阅读说明：本技术 毫米波阵列天线、壳体组件以及电子设备 (Millimeter wave array antenna, housing assembly, and electronic device ) 是由 王泽东 于 2020-11-30 设计创作，主要内容包括：本申请提供了一种毫米波阵列天线、壳体组件以及电子设备,该毫米波阵列天线包括依次排布设置的多个天线单元,其中每个天线单元设有耦合部,且至少一个天线单元的耦合部与相邻的另一天线单元的耦合部形成耦合电容。本实施例中的毫米波阵列天线通过相邻天线单元之间耦合部形成的耦合电容,使相邻的天线单元之间彼此发生耦合,并使得毫米波阵列天线的尺寸减小,实现毫米波阵列天线的小型化。(The application provides a millimeter wave array antenna, a shell assembly and electronic equipment, this millimeter wave array antenna is including arranging a plurality of antenna element that set up in proper order, and wherein every antenna element is equipped with coupling part, and at least one antenna element's coupling part and adjacent another antenna element's coupling part form coupling capacitance. The millimeter wave array antenna in this embodiment couples the adjacent antenna units with each other through the coupling capacitor formed by the coupling portion between the adjacent antenna units, and reduces the size of the millimeter wave array antenna, thereby realizing the miniaturization of the millimeter wave array antenna.)

1. The millimeter wave array antenna is characterized by comprising a plurality of antenna units which are sequentially arranged, each antenna unit is provided with a coupling part, and the coupling part of at least one antenna unit is configured to form a coupling capacitor with the coupling part of another adjacent antenna unit.

2. The millimeter-wave array antenna according to claim 1, wherein each of the antenna elements includes a radiating element, and the coupling portion is provided to the radiating element.

3. The millimeter-wave array antenna according to claim 2, wherein the number of the coupling portions of each of the antenna elements is two, and the two coupling portions include a first coupling portion and a second coupling portion; the first coupling part and the second coupling part are respectively positioned at two ends of the antenna unit which are deviated from each other.

4. The millimeter wave array antenna according to claim 3, wherein the plurality of antenna elements includes a first antenna element and a second antenna element, the first antenna element and the second antenna element are disposed adjacently in parallel, and the first coupling portion of the first antenna element and the second coupling portion of the second antenna element are disposed at an interval in a different plane.

5. The mmwave array antenna according to claim 3, wherein the radiating element of each antenna element comprises a first radiating sub-element and a second radiating sub-element which are spaced apart from each other, and the first coupling portion is disposed on a side of the first radiating sub-element away from the second radiating sub-element; the second coupling portion is disposed on a side of the second sub-radiating element away from the first sub-radiating element.

6. The millimeter-wave array antenna of claim 5, further comprising a dielectric substrate comprising first and second surfaces that face away from each other; the first sub-radiating element is arranged on the first surface, and the second sub-radiating element is arranged on the second surface.

7. The mmwave array antenna of claim 6, wherein the first sub-radiating element comprises a first radiator and a first metal conductor connected to the first radiator, and the first coupling portion is located on a side of the first radiator away from the first metal conductor; the first metal conductor is used for connecting the feed source.

8. The mmwave array antenna of claim 7, wherein the first radiator includes a first radiation portion and a first connection portion connected to the first radiation portion, and the first coupling portion is located on a side of the first radiation portion away from the first connection portion; one end of the first connecting part, which is far away from the first radiation part, is connected to the first metal conductor; the width of the first connecting part is gradually increased along the direction close to the first radiation part, and the maximum width is equal to the width of the first radiation part.

9. The mmwave array antenna of claim 7, wherein the second sub radiating element comprises a second radiator and a second metal conductor connected to the second radiator, and the second coupling portion is located on a side of the second radiator away from the second metal conductor; the second metal conductor is used for connecting the feed source.

10. The millimeter wave array antenna according to claim 9, wherein the second radiator includes a second radiation portion and a second connection portion connected to the second radiation portion, and the second coupling portion is located on a side of the second radiation portion away from the second connection portion; one end, far away from the second radiation part, of the second connecting part is connected to the second metal conductor; the width of the second connecting part is gradually increased along the direction close to the second radiation part, and the maximum width is equal to the width of the second radiation part.

11. The millimeter wave array antenna according to claim 9, wherein orthographic projections of the first metal conductor and the second metal conductor on the surface of the dielectric substrate are parallel to each other.

12. The mmwave array antenna of claim 9, wherein each of the antenna elements further comprises a pre-coupler disposed on at least one of the first surface and the second surface, the pre-coupler configured to couple with at least one of the first radiator and the second radiator.

13. The mmwave array antenna of claim 12, wherein the front coupler is disposed on the first surface, a first gap is disposed between the front coupler and the first radiator, and a second gap is disposed between an orthographic projection of the front coupler on the dielectric substrate surface and an orthographic projection of the second radiator on the dielectric substrate surface.

14. The millimeter wave array antenna according to any one of claims 1 to 13, wherein at least a part of the plurality of antenna elements are arranged in a row in sequence, and the antenna elements located at end positions of the row of antenna elements are edge antenna elements; the millimeter wave array antenna further comprises a parasitic antenna unit, wherein the parasitic antenna unit is arranged on one side of the edge antenna unit and used for enhancing the impedance matching performance of the edge antenna unit.

15. The mmwave array antenna of claim 14, wherein the number of the edge antenna elements is two, the two edge antenna elements are respectively located at two ends of the antenna elements arranged in a row, the number of the parasitic antenna elements is two, the two parasitic antenna elements are arranged in one-to-one correspondence with the two edge antenna elements, and each parasitic antenna element is arranged on one side of the corresponding edge antenna element away from other antenna elements.

16. A housing assembly, comprising:

a middle frame;

the rear shell is connected to the middle frame; and

the millimeter wave array antenna according to any one of claims 1 to 15, the millimeter wave array antenna being provided in at least one of the middle frame and the rear case.

17. An electronic device, comprising:

the housing assembly of claim 16;

the display panel is connected with the shell assembly and forms an accommodating space with the shell assembly; and

and the electronic element is accommodated in the accommodating space.

Technical Field

The application relates to the technical field of communication equipment, in particular to a millimeter wave array antenna, a shell assembly and electronic equipment.

Background

With the continuous iteration of communication technology, the millimeter wave antenna becomes an indispensable element of the mobile terminal. At present, a millimeter wave antenna applied to a mobile terminal is mostly a microstrip antenna, the working bandwidth of the microstrip antenna is usually narrow, and the microstrip antenna has a large volume. The space in the mobile terminal is limited, so the miniaturized design of the millimeter wave antenna is a hot spot studied by those skilled in the art.

Disclosure of Invention

The embodiment of the application provides a millimeter wave array antenna, a shell assembly and an electronic device.

The embodiment of the application provides a millimeter wave array antenna, and this millimeter wave array antenna is including arranging a plurality of antenna element that set up in proper order, and every antenna element is equipped with coupling part, and at least one antenna element's coupling part is configured to form the electric capacity with the coupling part of another antenna element that is adjacent.

The application further provides a shell assembly, which comprises a middle frame, a rear shell and the millimeter wave array antenna, wherein the rear shell is connected to the middle frame, and the millimeter wave array antenna is arranged on at least one of the middle frame and the rear shell.

The application also provides an electronic device, which comprises the shell assembly, the display panel and the electronic element; the display panel is connected with the shell assembly and forms an accommodating space with the shell assembly; the electronic component is accommodated in the accommodating space.

The millimeter wave array antenna comprises a plurality of antenna units which are sequentially arranged, wherein each antenna unit is provided with a coupling part, and the coupling part of at least one antenna unit is configured to form a coupling capacitor with the coupling part of another adjacent antenna unit. In the millimeter wave array antenna in this embodiment, the coupling capacitors formed by the coupling portions between the adjacent antenna elements couple the adjacent antenna elements with each other, so that the impedance matching performance of the millimeter wave antenna array is enhanced, the operating bandwidth of the millimeter wave array antenna is increased, the size of the millimeter wave array antenna is effectively reduced under the condition that the operating bandwidth is not changed, and the miniaturization of the millisecond wave array antenna is realized.

These and other aspects of the present application will be more readily apparent from the following description of the embodiments.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings that are needed to be used in the description of the present application will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of an electronic device according to an embodiment of the present application.

Fig. 2 is a schematic structural diagram of a housing assembly according to an embodiment of the present disclosure.

Fig. 3 is a schematic structural diagram of a millimeter wave array antenna according to an embodiment of the present application.

Fig. 4 is a schematic structural diagram of a coupling portion according to an embodiment of the present application.

Fig. 5 is a diagram illustrating a structure of a millimeter wave array antenna according to an embodiment of the present disclosure.

Fig. 6 is a schematic equivalent circuit diagram of an antenna unit according to an embodiment of the present application.

Fig. 7 is a reflection coefficient test chart of the millimeter wave array antenna according to the embodiment of the present application.

Fig. 8 is a far-field direction test chart of the millimeter wave array antenna provided in the embodiment of the present application.

Fig. 9 is a schematic structural diagram of a first antenna unit according to an embodiment of the present application.

Fig. 10 is a diagram illustrating another structure of a millimeter wave array antenna according to an embodiment of the present application.

Fig. 11 is an exploded schematic view of a millimeter wave array antenna according to an embodiment of the present application.

Fig. 12 is a schematic structural diagram of another millimeter wave array antenna provided in this embodiment of the present application

Fig. 13 is a schematic projection diagram of an antenna unit on a surface of a dielectric substrate according to an embodiment of the present application.

Fig. 14 is a schematic structural diagram of a radiation unit according to an embodiment of the present application.

Fig. 15 is a schematic projection diagram of adjacent antenna units on a surface of a dielectric substrate according to an embodiment of the present application.

Fig. 16 is a diagram illustrating still another structure of a millimeter wave array antenna according to an embodiment of the present application.

Fig. 17 is a schematic structural diagram of a pre-coupler according to an embodiment of the present application.

Fig. 18 is a schematic structural diagram of a second antenna unit according to an embodiment of the present application.

Fig. 19 is a schematic projection diagram of the antenna unit in fig. 18 on the surface of the dielectric substrate.

Fig. 20 is a schematic structural diagram of a third antenna unit according to an embodiment of the present application.

Fig. 21 is a schematic structural diagram of a fourth antenna unit according to an embodiment of the present application.

Fig. 22 is a schematic projection diagram of the antenna unit in fig. 20 on the surface of the dielectric substrate.

Fig. 23 is a schematic structural diagram of a fifth antenna unit according to an embodiment of the present application.

Fig. 24 is a schematic structural diagram of a sixth antenna unit according to an embodiment of the present application.

Fig. 25 is a schematic structural diagram of a parasitic antenna element according to an embodiment of the present application.

Fig. 26 is a schematic structural diagram of another parasitic antenna element according to an embodiment of the present application.

Fig. 27 is a schematic structural diagram of another parasitic antenna element according to an embodiment of the present application.

Detailed Description

Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative and are only for the purpose of explaining the present application and are not to be construed as limiting the present application.

As used in embodiments herein, "electronic device" includes, but is not limited to, an apparatus that is configured to receive/transmit communication signals via a wireline connection, such as via a Public Switched Telephone Network (PSTN), a Digital Subscriber Line (DSL), a digital cable, a direct cable connection, and/or another data connection/network, and/or via a wireless interface (e.g., for a cellular network, a Wireless Local Area Network (WLAN), a digital television network such as a DVB-H network, a satellite network, an AM-FM broadcast transmitter, and/or another communication terminal). A communication terminal arranged to communicate over a wireless interface may be referred to as a "wireless communication terminal", a "wireless terminal", an "electronic apparatus", and/or an "electronic device". Examples of electronic devices include, but are not limited to, satellite or cellular telephones; a Personal Communications System (PCS) terminal that may combine a cellular radiotelephone with data processing, facsimile and data communications capabilities; PDAs that may include radiotelephones, pagers, internet/intranet access, Web browsers, notepads, calendars, and/or Global Positioning System (GPS) receivers; as well as conventional laptop and/or palmtop receivers, gaming consoles, or other electronic devices that include radiotelephone transceivers.

In order to make the technical solutions of the present application better understood, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

Referring to fig. 1, fig. 1 schematically illustrates an electronic device 300, where the electronic device 300 may be a cellular phone, a smart phone, other wireless communication devices, a Personal Digital Assistant, an audio Player, other Media players, a music recorder, a video recorder, a camera, other Media recorders, a radio, a medical device, a vehicle transportation equipment, a calculator, a programmable remote controller, a pager, a laptop computer, a desktop computer, a printer, a netbook computer, a Personal Digital Assistant (PDA), a Portable Multimedia Player (MP), a Portable medical device, and a Digital camera, other handheld devices, such as a watch, a headset, a pendant, a headset, and the like, and where the electronic device 10 may also be other wearable devices capable of communicating (e.g., such as electronic glasses, electronic clothing, a headset, and the like), A head-mounted device of an electronic bracelet, an electronic necklace, an electronic device 10 or a smart watch.

In the embodiment of the present application, the electronic device 300 is described by taking a mobile phone as an example.

The electronic device 300 includes, but is not limited to, the display panel 100, the housing assembly 200, and electronic components (not shown). In this embodiment, the Display panel 100 may be, but not limited to, a Liquid Crystal Display (LCD), an Organic Light-Emitting Diode (OLED) Display panel, a Quantum Dot Light Emitting Diode (QLED) Display panel, a Micro-LED Display panel, and the like.

The display panel 100 and the housing assembly 200 are connected to form an accommodating space, and the electronic components are disposed in the accommodating space. The electronic components include, but are not limited to, radio frequency components, fingerprint identification modules, camera modules, face recognition modules, processors, memories, batteries, and the like.

Referring to fig. 2, the housing assembly 200 may include a middle frame 210 and a rear case 220. The middle frame 210 has two opposite sides, and one side of the middle frame 210 may be provided with a display panel and the other side of the middle frame 210. The rear case 220 is mounted on the other side of the middle frame 210, opposite to the display panel. The middle frame 210, the rear case 220, and the display panel form the above-mentioned receiving space.

Further, the housing assembly 200 may further include the millimeter wave array antenna 100, and the millimeter wave array antenna 100 may achieve good 5G (5th generation mobile communication technology) communication performance. Millimeter-wave array antenna 100 may be disposed in at least one of middle frame 210 and rear housing 220. In this embodiment, millimeter wave array antenna 100 may be disposed at middle frame 210. In some embodiments, millimeter-wave array antenna 100 may also be disposed in rear housing 220. In some embodiments, the millimeter-wave array antenna 100 may also be disposed on both the middle frame 210 and the rear housing 220.

Referring to fig. 3, the millimeter wave array antenna 100 includes a plurality of antenna units 10, and the antenna units 10 are sequentially arranged. The plurality of antenna units 10 may be arranged in a straight line. In this embodiment, the plurality of antenna units 10 may be sequentially arranged in a line along a straight line. In some embodiments, the plurality of antenna elements 10 may also be arranged in a multi-row array. In some embodiments, the plurality of antenna elements 10 may also be arranged in a stacked multi-layer structure, wherein each layer may be arranged in a multi-row array. In some embodiments, the plurality of antenna units 10 may be arranged in a circumferential sequence. Of course, in other embodiments, the plurality of antenna units 10 may be arranged along other predetermined tracks. The present application does not limit the arrangement locus of the millimeter wave array antenna 100.

Each antenna unit 10 may be connected to a feed source, and energy is transmitted to each antenna unit 10 through the feed source, so that the millimeter wave array antenna 100 may radiate a millimeter wave communication frequency band.

Referring to fig. 4, each antenna unit 10 is provided with a coupling portion 20, and the coupling portion 20 of at least one antenna unit 10 and the coupling portion 20 of another adjacent antenna unit 10 form a coupling capacitor. It should be noted that, when the millimeter wave array antenna 100 includes two antenna units 10, the coupling portions 20 of the two antenna units 10 are coupled to each other to form a coupling capacitor; when the millimeter wave array antenna 100 includes more than two antenna elements 10, each two adjacent antenna elements 10 may be coupled to each other through the coupling portion 20 to form a coupling capacitor.

Referring to fig. 5, taking the millimeter wave array antenna 100 as an example that includes three antenna units 10, the three antenna units 10 include a first antenna unit a, a second antenna unit B, and a third antenna unit C, which are sequentially arranged, wherein the first antenna unit a is adjacent to the second antenna unit B, the second antenna unit B is simultaneously adjacent to the first antenna unit a and the third antenna unit C, and the third antenna unit C is adjacent to the second antenna unit B. In this case, the coupling portion 20B of the second antenna element B can be coupled to the coupling portion 20A of the first antenna element a and the coupling portion 20C of the third antenna element C at the same time, so that a coupling capacitance is formed between the first antenna element a and the second antenna element B, and a coupling capacitance is formed between the third antenna element C and the second antenna element B.

Generally, in antenna design, the mutual coupling effect between a metal floor and an antenna affects the impedance matching performance of the antenna, wherein the metal floor is a metal conductor for reflecting electromagnetic waves during the operation of the antenna; in this embodiment, the millimeter wave array antenna 100 forms a coupling capacitor through the coupling portion 20 between the adjacent antenna units 10, so that the adjacent antenna units 10 are coupled with each other, thereby making up the coupling effect of the metal floor on the millimeter wave array antenna 100, and improving the impedance matching performance of the millimeter wave array antenna 100, so as to improve the working bandwidth of the millimeter wave array antenna 100, and thus effectively reduce the size of the millimeter wave antenna under the same bandwidth.

Specifically, referring to fig. 6, fig. 6 is an equivalent circuit diagram of a single antenna unit 10. The equivalent inductance of the antenna unit 10 is equivalent to the inductance L1, the coupling capacitance formed between adjacent antenna units 10 is equivalent to the capacitance C1, the coupling effect of the metal floor to the antenna unit 10 is equivalent to a transmission line with characteristic impedance Z0 and length H, and the air impedance is equivalent to the impedance Z0. Wherein Z0 may be about 377 ohms. The matching impedance performance of the antenna element 10 in the operating frequency band can be improved by the effect of the equivalent capacitor C1.

Referring to fig. 7, fig. 7 is a schematic diagram illustrating a reflection coefficient comparison test between the five-element millimeter wave array antenna 100 according to the embodiment of the present application and a conventional five-element millimeter wave array antenna. As can be seen from fig. 7, the millimeter wave array antenna 100 with the internal antenna elements coupled to each other has a smaller reflection coefficient than the conventional independent millimeter wave antenna with the internal antenna elements, and the millimeter wave array antenna 100 with the internal antenna elements coupled to each other has a reflection coefficient of less than-6 db in the range from 23.6GHz to 84.6GHz, and has a stronger impedance matching performance, a relative bandwidth ratio of about 3.6:1, and a very wide operating bandwidth. Millimeter-wave array antenna 100, in which internal antenna elements have a coupling effect with each other, is smaller in size than a conventional millimeter-wave array antenna in which internal antenna elements are independent, with the same bandwidth. Through tests, under the same bandwidth, the size of the quinary millimeter wave array antenna with the coupling function of the internal antenna elements of the embodiment is about 0.6 times of the wavelength, while the size of the quinary millimeter wave array antenna with the independent internal antenna elements is about 2.5 times of the wavelength, in comparison, the size of the millimeter wave array antenna 100 with the coupling function of the embodiment is only about one fourth of the size of the conventional millimeter wave array antenna, the size of the millimeter wave array antenna 100 is effectively reduced, and the miniaturization of the millimeter wave array antenna 100 is realized.

Meanwhile, referring to fig. 8, fig. 8 shows a schematic diagram of a five-element millimeter wave array antenna provided in the present application for testing in the far field directions of 24GHz and 42 GHz. As can be seen from the figure, the quinary millimeter wave array antenna has good directional radiation characteristics at 24GHz and 42 GHz.

Further, referring to fig. 9, in some embodiments, each antenna unit 10 includes a radiation unit 30, and the radiation unit 30 is configured to radiate electromagnetic waves. The radiation unit 30 includes a first sub-radiation unit 31 and a second sub-radiation unit 32. The first and second sub radiation elements 31 and 32 may radiate electromagnetic waves, respectively. Further, the first sub-radiating elements 31 and the second sub-radiating elements 32 are respectively arranged on two different planes. Specifically, the first sub-radiating elements 31 of the plurality of antenna elements 10 may be all arranged in a first plane, and the second sub-radiating elements 32 of the plurality of antenna elements 10 may be arranged in a second plane, where the first plane and the second plane are two planes parallel to each other. Further, the first sub-radiating element 31 and the second sub-radiating element 32 in each antenna element 10 are spaced from each other in a direction perpendicular to the first plane or the second plane and are not opposite to each other (i.e., are offset from each other).

The first sub-radiating element 31 has a first end 311, and the first end 311 may be a radiating end of the first sub-radiating element 31; the end of the first sub-radiating element 31 far from the first end 311 can be used for connecting a feed source, so that energy is transmitted to the radiating end of the first sub-radiating element 31; the second sub-radiating element 32 has a second end portion 321, and the second end portion 321 may be a radiating end of the second sub-radiating element 32; the end of the second sub-radiating element 32 remote from the second end 321 may be used to connect a feed source to transmit energy to the radiating end of the second sub-radiating element 32. It should be noted that the first sub-radiating element 31 and the second sub-radiating element 32 in the same antenna element 10 may be connected to the same feed source.

The first end 311 of the first sub-radiating element 31 and the second end 321 of the second sub-radiating element 32 may protrude toward two different directions. Specifically, in the plurality of antenna units 10 of the millimeter wave array antenna 100, except for the two antenna units 10 located at the edge, any other antenna unit 10 may have two adjacent first adjacent antenna units and second adjacent antenna units, and the first adjacent antenna units and the second adjacent antenna units are respectively arranged at two opposite sides of the antenna unit 10, so that the first end 311 of the first sub-radiating unit 31 of the antenna unit 10 may face the direction of the first adjacent antenna unit, and the second end 321 of the second sub-radiating unit 32 of the antenna unit 10 may face the direction of the second adjacent antenna unit. Thus, each antenna unit 10 except the edge-located antenna unit 10 can be coupled with two adjacent antenna units 10, so that the impedance matching performance of a single antenna unit 10 is improved, the overall impedance matching performance of the millimeter wave antenna array 100 is remarkably improved, and the overall size of the millimeter wave array antenna 100 is effectively reduced.

Each of the antenna elements 10 includes two coupling portions 20, and the two coupling portions 20 include a first coupling portion 21 and a second coupling portion 22. The first coupling portion 21 is disposed at the first end 311 of the first sub-radiating element 31, and the second coupling portion 22 is disposed at the second end 321 of the second sub-radiating element 32. The plurality of antenna elements 10 in the millimeter wave array antenna 100 may form a coupling capacitance by the first coupling section 21 and the second coupling section 22 between the adjacent antenna elements 10 being coupled to each other.

Referring to fig. 10, taking three antenna units 10 as an example, the three antenna units 10 include a first antenna unit a, a second antenna unit B and a third antenna unit C, which are sequentially arranged, wherein the first antenna unit a is adjacent to the second antenna unit B, the second antenna unit B is simultaneously adjacent to the first antenna unit a and the third antenna unit C, and the third antenna unit C is adjacent to the second antenna unit B. Specifically, the second sub-radiating element 32A of the first antenna element a is adjacent to the first sub-radiating element 31B of the second antenna element B, and the second sub-radiating element 32B of the second antenna element B is adjacent to the first sub-radiating element 31C of the third antenna element C. At this time, the second coupling portion 22A of the first antenna element a and the first coupling portion 21B of the second antenna element B are coupled to each other, so that a coupling capacitor is formed between the first antenna element a and the second antenna element B, and the first antenna element a and the second antenna element B are coupled to each other; the second coupling portion 22B of the second antenna unit B and the first coupling portion 21C of the third antenna unit C are coupled to each other, so that a coupling capacitor is formed between the second antenna unit B and the third antenna unit C, and the second antenna unit B and the third antenna unit C are coupled to each other.

Further, referring to fig. 11, in some embodiments, millimeter wave array antenna 100 may further include dielectric substrate 40, and the material of dielectric substrate 40 may include, but is not limited to, Polytetrafluoroethylene (PTFE) resin, polyphenylene ether (PPE) resin, Cyanate Ester (CE) resin, Polystyrene (PS) resin, Polyimide (PI) resin, and the like. The millimeter wave array antenna 100 is disposed on the dielectric substrate 40. The dielectric substrate 40 is substantially plate-shaped and includes a first surface 41 and a second surface 42 facing away from each other, wherein the first sub-radiating element 31 of each antenna unit 10 is disposed on the first surface 41 of the dielectric substrate 40, and the second sub-radiating element 32 of each antenna unit 10 is disposed on the second surface 42 of the dielectric substrate 40. In this embodiment, the first sub-radiating element 31 may be attached to the first surface 41 of the dielectric substrate 40 by a patch; the second sub-radiating element 32 may also be attached to the second surface 42 of the dielectric substrate 40 by a patch. In some embodiments, the first sub-radiating element 31 may be further embedded inside the dielectric substrate 40 on a side close to the first surface 41; the second sub-radiating element 32 may also be embedded inside the dielectric substrate 40 on a side close to the second surface 42. The dielectric substrate 40 not only serves to support the antenna elements 10, but also serves as a dielectric of a coupling capacitance formed by the coupling portions 20 between the adjacent antenna elements 10.

In this embodiment, the first sub-radiating elements 31 of each antenna element 10 are sequentially arranged at intervals on the first surface 41 of the dielectric substrate 40, and one second sub-radiating element 32 is arranged on the second surface 42 at a region opposite to the gap region between adjacent first sub-radiating elements 31. The second sub-radiating elements 32 of each antenna element 10 are also sequentially arranged at intervals on the second surface 42 of the dielectric substrate 40, and one first sub-radiating element 31 is arranged on the first surface 41 in an area opposite to the gap area between adjacent second sub-radiating elements 32.

In the present embodiment, the first coupling portion 21 of the first sub-radiating element 31 and the second coupling portion 22 of the second sub-radiating element 32 are disposed opposite to each other with the dielectric substrate 40 interposed therebetween between the adjacent antenna elements 10. Specifically, the first coupling portion 21 and the second coupling portion 22 between adjacent antenna units 10 are disposed substantially opposite to each other in the thickness direction of the dielectric substrate 40, and orthogonal projections of the first coupling portion 21 and the second coupling portion 22 on the surface of the dielectric substrate 40 between adjacent antenna units 10 substantially coincide with each other, so that the first coupling portion 21 and the second coupling portion 22 between adjacent antenna units 10 form a coupling capacitance. The first coupling portion 21 and the second coupling portion 22 between adjacent antenna units 10 constitute upper and lower plates of a coupling capacitor, and the dielectric substrate 40 serves as a dielectric between the two plates of the coupling capacitor. The orthographic projection on the surface of the dielectric substrate 40 may be an orthographic projection on the first surface 41 of the dielectric substrate 40, or an orthographic projection on the second surface 42 of the dielectric substrate 40, and is not limited herein.

Referring to fig. 12, taking three antenna units 10 as an example, the three antenna units 10 include a first antenna unit a, a second antenna unit B and a third antenna unit C, which are sequentially arranged, wherein the first antenna unit a is adjacent to the second antenna unit B, the second antenna unit B is simultaneously adjacent to the first antenna unit a and the third antenna unit C, and the third antenna unit C is adjacent to the second antenna unit B. Specifically, the second sub-radiating element 32A of the first antenna element a is adjacent to the first sub-radiating element 31B of the second antenna element B, and the second sub-radiating element 32B of the second antenna element B is adjacent to the first sub-radiating element 31C of the third antenna element C. At this time, the second coupling portion 22A of the first antenna element a and the first coupling portion 21B of the second antenna element B are disposed to face each other with the dielectric substrate 40 interposed therebetween, and a coupling capacitance is formed between the first antenna element a and the second antenna element B; the second coupling portion 22B of the second antenna element B and the first coupling portion 21C of the third antenna element C are provided to face each other with the dielectric substrate 40 interposed therebetween, and a coupling capacitance is formed between the second antenna element B and the third antenna element C.

Further, referring to fig. 11 and 13 simultaneously, fig. 13 shows schematic orthographic projections of the antenna units 10 on the surface of the dielectric substrate 40, although the first sub-radiating unit 31 and the second sub-radiating unit 32 of each antenna unit 10 are respectively disposed on two surfaces of the dielectric substrate 40 facing away from each other, the orthographic projection of the first sub-radiating unit 31 on the surface of the dielectric substrate 40 and the orthographic projection of the second sub-radiating unit 32 on the surface of the dielectric substrate 40 are spaced from each other. With this arrangement, it is possible to avoid the first sub-radiating element 31 and the second sub-radiating element 32 in each antenna element 10 from being coupled to each other, which may result in a decrease in the impedance matching performance of the antenna element 10.

Referring to fig. 14, the first sub-radiating element 31 includes a first metal conductor 312 and a first radiator 313 connected to the first metal conductor 312. The first metal conductor 312 is substantially in an elongated shape, and has a first end connected to the first radiator 313 and a second end for connecting to a feed source; the first metal conductor 312 is used to transmit the energy of the feed source to the first radiator 313, so that the first radiator 313 radiates an electromagnetic wave.

Further, the first radiator 313 may have a substantially plate shape, and a surface of the first radiator 313 and a surface of the first metal conductor 312 may be the same plane. The first radiator 313 further includes two adjacent sidewalls, wherein the two adjacent sidewalls include a first sidewall with a relatively long length and a second sidewall with a relatively short length, and the first metal conductor 312 is perpendicular to the first sidewall, so that the impedance matching performance of the antenna unit 10 can be improved, and energy can be effectively transmitted to the first radiator 313. Further, the first radiator 313 includes a first radiation portion 3131 and a first connection portion 3132 connected to the first radiation portion 3131. An end of the first radiating portion 3131 away from the first connecting portion 3132 is a first end portion 311 of the antenna unit 10, and the first end portion 311 is provided with a first coupling portion 21. The first connection portion 3132 has a first connection end 3133 at an end thereof away from the first radiation portion 3131, the first connection end 3133 being used for connecting with the first metal conductor 312.

Further, the first connection portion 3132 is integrally formed with the first radiator 313, a width of the first connection portion 3132 gradually increases along a direction of the first radiation portion 3131, and a maximum width of the first connection portion 3132 is equal to a width of the first radiation portion 3131. Specifically, the direction of the first sidewall of the first radiator 313 is the longitudinal direction of the first radiator 313, and may also be understood as the longitudinal direction of the first radiating portion 3131 and the first connection portion 3132; the direction of the second sidewall of the first radiator 313 is also the width direction of the first radiator 313, and can also be understood as the width direction of the first radiating portion 3131 and the first connecting portion 3132. The width of the first connection portion 3132 gradually increases along a direction close to the first radiation portion 3131, that is, the first connection portion 3132 is substantially in a trapezoid shape, and the width of the first connection portion 3132 gradually increases along the length direction of the first radiation body 313, so that the width of a path for transmitting energy to the first radiation portion 3131 gradually increases, and further, the impedance matching performance of the first sub-radiation unit 31 is improved.

The second sub-radiating element 32 includes a second metal conductor 322 and a second radiator 323 connected to the second metal conductor 322. The second metal conductor 322 is substantially strip-shaped, and a first end thereof is connected with the second radiator 323 and a second end thereof is used for connecting the feed source; the second metal conductor 322 serves to transmit the energy of the feed source to the second radiator 323 so that the second radiator 323 radiates an electromagnetic wave.

Further, the second radiator 323 has a substantially plate shape, and a surface of the second radiator 323 and a surface of the second metal conductor 322 may be the same plane. The second radiator 313 further includes two adjacent sidewalls, each of which includes a first sidewall having a relatively long length and a second sidewall having a relatively short length, and the second metal conductor 322 is perpendicular to the first sidewall, so that the impedance matching performance of the antenna unit 10 can be improved, and energy can be effectively transmitted to the second radiator 323. Further, the second radiator 323 includes a second radiation portion 3231 and a second connection portion 3232 connected to the second radiation portion 3231. An end of the second radiation portion 3231 away from the second connection portion 3232 is a second end portion 321 of the antenna unit 10, and the second end portion 321 is provided with a second coupling portion 22. An end of the second connection portion 3232 away from the second radiation portion 3231 is provided with a second connection end 3233, and the second connection end 3233 is used for connecting with the second metal conductor 322.

Further, the second connection portion 3232 is integrally formed with the second radiator 323, a width of the second connection portion 3232 gradually increases along a direction of the second radiation portion 3231, and a maximum width of the second connection portion 3232 is equal to a width of the second radiation portion 3231. Specifically, the direction of the first sidewall of the second radiator 323 is the longitudinal direction of the second radiator 323, and is also the longitudinal direction of the second radiation portion 3231 and the second connection portion 3232; the second side wall of the second radiator 323 is also in the width direction of the second radiator 323, and the second radiation portion 3231 and the second connection portion 3232 are also in the width direction. The width of the second connection portion 3232 gradually increases along a direction close to the second radiation portion 3231, that is, the second connection portion 3232 is substantially in a trapezoid shape, and the width of the second connection portion 3232 gradually increases along the length direction of the second radiator 323, so that the width of a path for transmitting energy to the second radiation portion 3231 gradually increases, and further, the impedance matching performance of the second sub-radiation unit 32 is improved.

Referring to fig. 13 and fig. 14, in the present embodiment, in a single antenna unit 10, orthographic projections of the first metal conductor 312 of the first sub-radiating element 31 and the second metal conductor 322 of the second sub-radiating element 32 on the surface of the dielectric substrate 40 are parallel to each other. Because the first sub-radiating element 31 and the second sub-radiating element 32 transmit energy through the same feed source, the first metal conductor 312 and the second metal conductor 322 can provide stable input impedance for the antenna unit 10, and further improve the impedance matching performance of the antenna unit 10.

Referring to fig. 15, in the present embodiment, orthogonal projections of the first radiator 313 and the second radiator 323 between adjacent antenna units 10 on the surface of the dielectric substrate 40 are at least partially overlapped. Since the first radiator 313 and the second radiator 323 of each antenna unit 10 are respectively disposed on both surfaces of the dielectric substrate 40, it can also be understood that the first radiator 313 and the second radiator 323 between adjacent antenna units 10 are staggered on both surfaces of the dielectric substrate 40. In the embodiment of the present application, the overlapped or staggered portions are also the first coupling portion 21 and the second coupling portion 22 between the adjacent antenna units 10.

Referring to fig. 16, in some specific implementation scenarios, taking three antenna units 10 as an example, the three antenna units 10 include a first antenna unit a, a second antenna unit B, and a third antenna unit C, which are sequentially arranged. The first antenna unit a is adjacent to the first side of the second antenna unit B, the orthographic projection part of the second radiator 323A of the first antenna unit a and the orthographic projection part of the first radiator 313B of the second antenna unit B on the surface of the dielectric substrate 40 coincide, the part of the second radiator 323A of the first antenna unit a coinciding with the first radiator 313B of the second antenna unit B is the second coupling part 22A of the first antenna unit a, and the part of the first radiator 313B of the second antenna unit B coinciding with the second radiator 323A of the first antenna unit a is the first coupling part 21B of the second antenna unit B; the third antenna unit C is adjacent to the second side of the second antenna unit B, the orthogonal projection portion of the second radiator 323B of the second antenna unit B and the first radiator 313C of the third antenna unit C on the surface of the dielectric substrate 40 is overlapped, the portion where the second radiator 323B of the second antenna unit B and the first radiator 313C of the third antenna unit C are overlapped is the second coupling portion 22B of the second antenna unit B, and the portion where the first radiator 313C of the third antenna unit C and the second radiator 323B of the second antenna unit B are overlapped is the first coupling portion 21C of the third antenna unit C.

In this embodiment, the orthographic projection parts of the first radiator 313 and the second radiator 323 between the adjacent antenna units 10 on the surface of the dielectric substrate 40 are overlapped, so that a coupling capacitor is formed between the adjacent antenna units 10, the impedance matching characteristic of the antenna units 10 is further improved, the bandwidth of the millimeter wave array antenna 100 is increased, and then the size of the millimeter wave array antenna 100 is smaller under the condition of the same bandwidth, thereby realizing the miniaturization of the millimeter wave array antenna 100.

It is worth noting that the larger the equivalent capacitance of the coupling capacitor is, the larger the improvement of the impedance matching performance of the antenna unit 10 is. In this embodiment, the size of the area where the orthographic projections of the first radiator 313 and the second radiator 323 between the adjacent antenna units 10 on the surface of the dielectric substrate 40 overlap can be changed, so as to change the size of the equivalent capacitance of the coupling capacitance. Specifically, the area of the first radiator 313 and the area of the second radiator 323 between the adjacent antenna units 10 that overlap each other in the orthographic projection on the surface of the dielectric substrate 40 are changed, that is, the area of the first coupling portion 21 and the second coupling portion 22 between the adjacent antenna units 10 are changed, and since the first coupling portion 21 and the second coupling portion 22 between the adjacent antenna units 10 correspond to the upper and lower two capacitor plates of the coupling capacitor formed by the first coupling portion 21 and the second coupling portion 22, the area of the first coupling portion 21 and the second coupling portion 22 between the adjacent antenna units 10 is changed, that is, the plate area of the coupling capacitor is changed. Therefore, when the overlapping area of the orthographic projections of the first radiator 313 and the second radiator 323 between the adjacent antenna units 10 on the surface of the dielectric substrate 40 is increased, the plate area of the coupling capacitor is increased, and further the equivalent capacitance of the coupling capacitor is increased, so that the impedance matching performance of the antenna units 10 is improved greatly, and the size of the millimeter wave array antenna 100 can be reduced.

Further, referring to fig. 17, each antenna unit 10 further includes a front coupling body 50. The pre-coupler 50 is disposed on the surface of the dielectric substrate 40. Specifically, the front coupler 50 is disposed on at least one of the first surface 41 and the second surface 42 of the dielectric substrate 40 for coupling with at least one of the first radiator 313 and the second radiator 323 in the antenna unit 10. The impedance matching performance of the antenna unit 10 can be further improved by coupling the pre-coupler 50 with at least one of the first radiator 313 and the second radiator 323.

In this embodiment, the pre-coupling body 50 is disposed on one of the first surface 41 and the second surface 42 of the dielectric substrate 40. Specifically, the front coupling body 50 may be disposed on the first surface 41 of the dielectric substrate 40, and may also be disposed on the second surface 42 of the dielectric substrate 40. The following description will be made by taking an example in which the pre-coupler 50 is provided on the first surface 41 of the dielectric substrate 40. Referring to fig. 18 and 19, fig. 19 is a schematic view of a projection of the antenna unit 10 on the surface of the dielectric substrate 40, in which the front coupler 50 is substantially in a long strip shape, a first gap is provided between the front coupler 50 and the first radiator 313, and a second gap is provided between an orthogonal projection of the front coupler 50 on the surface of the dielectric substrate 40 and an orthogonal projection of the second radiator 323 on the surface of the dielectric substrate 40.

Specifically, the front coupling body 50 may include a first front coupling portion 501 and a second front coupling portion 502, where the first front coupling portion 501 and the second front coupling portion 502 are respectively located at two opposite ends of the front coupling body 50. The first front coupling portion 501 is located on a side of the first surface 41 close to the first radiator 313. A first gap is formed between the first front coupling portion 501 and the first radiator 313, and the first front coupling portion 501 can be coupled with the first radiator 313, so as to further improve the impedance matching performance of the antenna unit 10. The second front coupling portion 502 is located on one side of the first surface 41 close to the second radiator 323, and a second gap is formed between an orthographic projection of the second front coupling portion 502 on the surface of the dielectric substrate 40 and an orthographic projection of the second radiator 323 on the surface of the dielectric substrate 40, and the second front coupling portion 502 and the second radiator 323 can generate a coupling effect, so as to further improve the impedance matching performance of the antenna unit 10. Further, the front coupler 50 is disposed substantially parallel to the first radiator 313, and an orthogonal projection of the front coupler 50 on the surface of the dielectric substrate 40 is substantially parallel to an orthogonal projection of the second radiator 323 on the surface of the dielectric substrate 40. Thus, the impedance matching performance of the antenna unit 10 can be further improved. In some embodiments, the pre-coupler 50 and the first radiator 313 may not be parallel, and an orthogonal projection of the pre-coupler 50 on the surface of the dielectric substrate 40 and an orthogonal projection of the second radiator 323 on the surface of the dielectric substrate 40 may not be parallel.

Referring to fig. 20, in some embodiments, the front coupler 50 may be coupled with only the first radiator 313 or the second radiator 323. The front radiator 50 is coupled to the first radiator 313 only, and the front coupler 50 is located on a side of the first surface 41 close to the first radiator 313 and has a first gap with the first radiator 313. Referring to fig. 21 and fig. 22, in which fig. 22 is a schematic view of a projection of an antenna unit on a surface of a dielectric substrate 40, a front coupler 50 is coupled to only the second radiator 323, the front coupler 50 is located on a side of the first surface 41 close to the second radiator 323, and a second gap is formed between an orthogonal projection of the front coupler 50 on the surface of the dielectric substrate 40 and an orthogonal projection of the second radiator 323 on the surface of the dielectric substrate 40.

It should be noted that, in the case that the pre-coupling element 50 is disposed on one of the first surface 41 and the second surface 42 of the dielectric substrate 40, the structure of the pre-coupling element 50 disposed on the second surface 42 of the dielectric substrate 40 may be the same as the structure of the pre-coupling element 50 disposed on the first surface 41 of the dielectric substrate 40, and will not be described again.

Referring to fig. 23, in some other embodiments, each antenna unit may include two front couplers 50, and the two front couplers 50 may include a first front coupler 51 and a second front coupler 52. The first pre-coupling body 51 is disposed on the first surface 41 of the dielectric substrate 40, and the second pre-coupling body 52 is disposed on the second surface 42 of the dielectric substrate 40. The first pre-coupler 51 may include two pre-coupler parts, and the two pre-coupler parts may be respectively disposed at a side close to the first radiator 313 and a side close to the second radiator 323 to be respectively coupled with the first radiator 313 and the second radiator 323, which may refer to the foregoing description and is not repeated herein; the second pre-coupler 52 may also include two pre-couplers, and the two pre-couplers may also be respectively disposed on a side close to the first radiator 313 and a side close to the second radiator 323 to respectively couple with the first radiator 313 and the second radiator 323, which may refer to the foregoing description and is not repeated herein.

Referring to fig. 24, in some embodiments, the first front coupler 51 may be disposed only on one side close to the first radiator 313, and the first front coupler 51 is coupled to the first radiator 313 only; the second pre-coupler 52 may be disposed only at a side close to the second radiator 323, and the first pre-coupler 51 is coupled only with the second radiator 323.

Referring to fig. 25, at least a portion of the antenna units 10 of the mm-wave array antenna 100 are sequentially arranged in a row, and the antenna unit 10 located at the end of the row of antenna units 10 is an edge antenna unit 110. In this embodiment, there are two edge antenna units 110, and the two edge antenna units 110 are respectively located at two ends of the antenna units 10 arranged in a row, specifically, the two edge antenna units 110 are the antenna units 10 located at two side edges among the multiple antenna units 10 of the millimeter wave array antenna 100. Each antenna element 10 includes a first radiation element 31 and a second radiation element 32, the antenna element 10 located at the edge has another adjacent antenna element 10 only on one side close to the first radiation element 31 or one side close to the second radiation element 32, and the other antenna elements 10 except the antenna element 10 located at the edge have another adjacent antenna element 10 on both one side close to the first radiation element 31 and one side close to the second radiation element 32. In this embodiment, the antenna units 10 located at the two side edges include a first edge antenna unit 111 located at the first edge and a second edge antenna unit 112 located at the second edge, wherein the first edge antenna unit 111 has another adjacent antenna unit 10 only on one side close to the second radiating unit 32, and the second edge antenna unit 112 has another adjacent antenna unit 10 only on one side close to the first radiating unit 31.

Further, the side of the first edge antenna element 111 away from the first edge is provided with another antenna element 10 adjacent to the first edge antenna element 111. The first edge antenna element 111 includes one coupling portion 20, and the coupling portion 20 forms a coupling capacitance with the coupling portion 20 of another adjacent antenna element 10. Specifically, the first edge antenna unit 111 includes a first end 311 and a second end 321 that are opposite to each other, the first end 311 is disposed on the first radiator 313 of the first edge antenna unit 111, and the second end 321 is disposed on the second radiator 323 of the first edge antenna unit 111. Wherein the first end 311 of the first edge antenna element 111 includes a first free end 3111, and the first free end 311 is located at the edge of the millimeter wave array antenna 100 and is not coupled to other antenna elements 10; the second end 321 of the first edge antenna element 111 is provided with a coupling portion 20, and a coupling capacitance is formed between the coupling portion 20 and the coupling portion 20 of the adjacent antenna element 10.

The side of the second edge antenna element 112 remote from the second edge is provided with another antenna element 10 adjacent to the second edge antenna element 112. The second edge antenna element 112 includes one coupling portion 20, and the coupling portion 20 forms a coupling capacitance with the coupling portion 20 of another adjacent antenna element 10. Specifically, the second edge antenna unit 112 includes a first end 311 and a second end 321 that are opposite to each other, the first end 311 is disposed on the first radiator 313 of the first edge antenna unit 111, and the second end 321 is disposed on the second radiator 323 of the first edge antenna unit 111. The first end 311 of the second edge antenna element 112 is provided with a coupling portion 20, the coupling portion 20 forms a coupling capacitance with the coupling portion 20 of the adjacent antenna element 10, and the second end 321 of the second edge antenna element 112 includes a second free end 3112, the second free end 3112 is located at the edge of the millimeter wave array antenna 100, and is not coupled with other antenna elements 10.

In this embodiment, the millimeter-wave array antenna 100 may further include a parasitic antenna unit 60, where the parasitic antenna unit 60 is disposed on one side of the edge antenna unit 110, so as to enhance the impedance matching performance of the edge antenna unit 110. Specifically, the parasitic antenna element 60 may be disposed in at least one of the first edge antenna element 111 and the second edge antenna element 112 to enhance at least one impedance matching characteristic in the first edge antenna element 111 and the second edge antenna element 112.

As another embodiment, referring to fig. 25, the parasitic antenna element 60 may be disposed on both the first edge antenna element 111 and the second edge antenna element 112. The number of the parasitic antenna units 60 is two, the two parasitic antenna units 60 are disposed in one-to-one correspondence with the two edge antenna units 110, and each parasitic antenna unit 60 is disposed on a side of the corresponding edge antenna unit 110 away from the other antenna units 10. Specifically, the two parasitic antenna elements 60 include a first parasitic antenna element 61 and a second parasitic antenna element 62. The first parasitic antenna element 61 is disposed at the first end 311 of the first edge antenna element 111, and particularly disposed at the first free end 3111 of the first end 311. In this embodiment, the first parasitic antenna element 61 is integrally formed with the first edge antenna element 111, that is, the first parasitic antenna element 61 is integrally formed with the first radiator 313 of the first edge antenna element 111, so that the length of the first radiator 313 of the first edge antenna element 111 is longer than that of the second radiator 323 of the first edge antenna element 111. The second parasitic antenna element 62 is disposed at the second end portion 321 of the second edge antenna element 112, and particularly disposed at the second free end 3112 of the second end portion 321. In this embodiment, the second parasitic antenna element 62 and the second edge antenna element 112 are integrally formed, that is, the second parasitic antenna element 62 and the second radiator 323 of the second edge antenna element 112 are integrally formed, so that the length of the second radiator 323 of the second edge antenna element 112 is longer than that of the first radiator 313 of the second edge antenna element 112. With this arrangement, the impedance matching performance of the first edge antenna element 111 and the second edge antenna element 112 can be improved at the same time.

Referring to fig. 26, as an embodiment, the parasitic antenna element 60 may be disposed on the first edge antenna element 111 or the second edge antenna element 112. Taking the parasitic antenna element 60 disposed on the first edge antenna element 111 as an example, the parasitic antenna element 60 is disposed on the first end portion 311 of the first edge antenna element 111, specifically, on the first free end 3111 of the first end portion 311. In this embodiment, the parasitic antenna unit 60 is integrally formed with the first edge antenna unit 111, that is, the parasitic antenna unit 60 is integrally formed with the first radiator 313 of the first edge antenna unit 111, so that the length of the first radiator 313 of the first edge antenna unit 111 is longer than the length of the second radiator 323 of the first edge antenna unit 111. With this configuration, the impedance matching performance of the first edge antenna unit 111 can be improved.

Referring to fig. 26, the parasitic antenna element 60 is disposed at the second end portion 321 of the second edge antenna element 112, specifically, at the second free end 3112 of the second end portion 321. In this embodiment, the parasitic antenna element 60 and the second edge antenna element 112 are integrally formed, that is, the parasitic antenna element 60 and the second radiator 323 of the second edge antenna element 112 are integrally formed, so that the length of the second radiator 323 of the second edge antenna element 112 is longer than that of the first radiator 313 of the second edge antenna element 112. With this configuration, the impedance matching performance of the second edge antenna unit 112 can be improved.

In some embodiments, the plurality of antenna elements 10 in the millimeter-wave array antenna 100 may be arranged in a circle, and the first free end 3111 of the first edge antenna element 111 may be coupled with the second free end 3112 of the second edge antenna element 112 to form a coupling capacitor, so that the impedance matching performance of the first edge antenna element 111 and the second edge antenna element 112 may be ensured without providing the parasitic antenna element 60 on the first edge antenna element 111 and the second edge antenna element 112.

The millimeter wave array antenna provided by the embodiment of the application comprises a plurality of antenna units which are sequentially arranged, wherein each antenna unit is provided with a coupling part, and a coupling capacitor is formed between the coupling part of at least one antenna unit and the coupling part of another adjacent antenna unit, so that the adjacent antenna units are coupled with each other, the size of the millimeter wave array antenna is reduced, and the miniaturization of the millimeter wave array antenna is realized.

Although the present application has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.