阅读说明：本技术 双频天线及其电子装置 (Dual-frequency antenna and electronic device thereof ) 是由 陈星豪 邱弘伟 简瑞志 游舜荃 于 2021-10-15 设计创作，主要内容包括：本发明提供一种双频天线及其电子装置。双频天线包括馈入端；环形连接端具有开孔,环形连接端连接于馈入端；金属螺丝的螺纹头穿设于开孔,使得金属螺丝与环形连接端电性导通连接；第一延伸路径连接于馈入端；第二延伸路径连接于第一延伸路径；第三延伸路径连接于第二延伸路径；接地部连接于第三延伸路径；其中本发明双频天线构成单极天线以及回路天线的形式,让双频天线形成宽带的操作频带,使天线频带变宽,以及让单极天线操作在3.6GHz和回路天线操作在4.6GHz,可涵盖Sub-6G所需要使用的频带。(The invention provides a dual-frequency antenna and an electronic device thereof. The dual-frequency antenna comprises a feed-in end; the annular connecting end is provided with an opening and is connected with the feed-in end; the thread head of the metal screw penetrates through the opening, so that the metal screw is electrically connected with the annular connecting end in a conduction manner; the first extending path is connected with the feed-in end; the second extending path is connected with the first extending path; the third extending path is connected with the second extending path; the grounding part is connected to the third extending path; the dual-frequency antenna of the invention forms a monopole antenna and a loop antenna, so that the dual-frequency antenna forms a broadband operation frequency band, the frequency band of the antenna is widened, the monopole antenna operates at 3.6GHz and the loop antenna operates at 4.6GHz, and the frequency band required by Sub-6G can be covered.)

1. A dual-band antenna, comprising:

a feed-in terminal;

the annular connecting end is provided with an opening and is connected with the feed-in end;

the screw thread head of the metal screw penetrates through the opening, so that the metal screw is electrically connected with the annular connecting end in a conduction manner;

a first extending path connected to the feeding end;

a second extending path connected to the first extending path;

a third extending path connected to the second extending path; and

a grounding part connected to the third extending path;

the feed end, the first extension path, the second extension path, the third extension path and the grounding part form a loop antenna.

2. The dual-band antenna of claim 1, wherein the length of the metal screw is selected to be 6mm to 8mm, and the width of the metal screw is selected to be 4 mm.

3. The dual-band antenna of claim 2, wherein the length of the metal screw is selected to be 6 mm.

4. The dual-band antenna of claim 1, wherein the loop antenna comprises a substrate in the form of a flexible printed circuit board.

5. The dual-band antenna of claim 1, wherein the monopole antenna operates at a quarter-wave resonant frequency and the loop antenna operates at a half-wave resonant frequency.

6. The dual-band antenna of claim 1, wherein the loop connector is formed using copper foil tape.

7. The dual-band antenna of claim 1, wherein the monopole antenna and the loop antenna have current paths oriented orthogonally to each other.

8. An electronic device using the dual band antenna as claimed in any of claims 1 to 7, wherein the metal screw is a screw used for fixing on the electronic device.

9. The electronic device of claim 8, wherein multiple sets of the dual-band antenna are used at multiple peripheries of the electronic device.

10. The electronic device of claim 8, wherein the metal screw is directly fixed at a position on the electronic device or the metal screw is fixed at the position on the electronic device through a housing of the electronic device.

Technical Field

The present disclosure relates to antennas, and particularly to a dual-band antenna and an electronic device thereof.

Background

Since the smaller the electronic product is, the space for placing the antenna in the electronic product is limited, it is difficult to design an antenna meeting the frequency band or specification requirement in the limited space of the electronic product.

The conventional antenna is designed with a reduced chip antenna and a high dielectric coefficient material as a carrier, and the chip antenna has the advantage of small size, but the antenna operation bandwidth is usually narrow, and the bandwidth cannot completely meet the requirements of the communication system at present.

Disclosure of Invention

In view of the problems of the prior art, an object of the present invention is to provide a dual-band antenna, so as to solve the problems of how to effectively improve the bandwidth of the antenna and how to adapt to the limited space of the electronic product to design the antenna meeting the specification requirements.

According to an embodiment of the present invention, a dual-band antenna is provided, which includes a feeding terminal; the annular connecting end is provided with an opening and is connected with the feed-in end; the screw thread head of the metal screw penetrates through the opening, so that the metal screw is electrically connected with the annular connecting end in a conduction manner; a first extending path connected to the feeding end; a second extending path connected to the first extending path; a third extending path connected to the second extending path; a grounding part connected to the third extending path; the feed end, the first extension path, the second extension path, the third extension path and the grounding part form a loop antenna.

According to another embodiment of the present invention, an electronic device using a dual-band antenna is provided, wherein the metal screw is used for fixing the electronic device.

The possible technical effects of the invention are that the dual-frequency antenna forms a monopole antenna and a loop antenna, the dual-frequency antenna forms a broadband operation frequency band, the antenna frequency band is widened, and the monopole antenna operates at 3.6GHz and the loop antenna operates at 4.6GHz, which can cover the frequency band required by Sub-6G.

In addition, when the metal screw is designed to be a part of the antenna, especially when the metal screw is used as a monopole antenna, the monopole antenna is very convenient to manufacture and low in material cost, and the metal screw can be directly fixed, so that the metal screw can be directly applied to electronic products.

The metal screw is designed to be a part of the antenna, so that the metal material required to be arranged in the original monopole antenna and the material of the substrate are replaced, the design cost of the antenna can be greatly reduced, the metal screw is designed to be a part of the antenna, the occupied space of the monopole antenna due to the design of the path is simplified, and the size of the whole dual-frequency antenna can be reduced.

For a further understanding of the techniques, methods and functions of the present invention, reference should be made to the following detailed description of the invention, taken in conjunction with the accompanying drawings, which are included to provide a further understanding of the invention, and to the purpose of the invention, and to the features and advantages thereof, and to the accompanying drawings, which are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification.

Drawings

Fig. 1 is a schematic structural diagram of a dual-band antenna according to an embodiment of the invention.

Fig. 2 is a schematic structural diagram of a dual-band antenna combined with an electronic device according to an embodiment of the invention.

Fig. 3 is a schematic structural diagram of a metal screw of a monopole antenna of a dual-band antenna and a chassis of an electronic device in a vertical design, and a loop antenna and a chassis of an electronic device in a horizontal design according to an embodiment of the invention.

FIG. 4 shows Reflection coefficients (Reflection coefficients) of the dual-band antenna operating in the 3.125-5.5135 GHz band according to an embodiment of the invention.

Fig. 5 is a diagram showing a radiation pattern of a monopole antenna of a dual-band antenna operating at 3.6GHz and viewed from the front along the X-Y-Z axis according to an embodiment of the present invention.

Fig. 6 is a diagram showing the radiation pattern of the monopole antenna of the dual-band antenna operating at 3.6GHz and having an X-Y-Z axis as a reverse viewing angle according to an embodiment of the present invention.

Fig. 7 is a radiation pattern diagram of the loop antenna of the dual-band antenna according to an embodiment of the present invention operating at 4.6GHz and viewed from the front along the X-Y-Z axis.

Fig. 8 is a diagram showing the radiation pattern of the loop antenna of the dual-band antenna operating at 4.6GHz and viewed from the opposite side in the X-Y-Z axis according to an embodiment of the present invention.

Detailed Description

The following is a description of embodiments of the present disclosure related to a dual-band antenna and an electronic device thereof, and those skilled in the art will understand the advantages and effects of the present disclosure from the disclosure of the present disclosure. The invention is capable of other and different embodiments and its several details are capable of modification and various other changes, which can be made in various details within the specification and without departing from the spirit and scope of the invention. The drawings of the present invention are for illustrative purposes only and are not intended to be drawn to scale. The following embodiments will further explain the related art of the present invention in detail, but the disclosure is not intended to limit the scope of the present invention.

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

The invention discloses a dual-frequency antenna applicable to electronic devices, such as intelligent or portable electronic devices of mobile phones, industrial mobile phones, tablet computers and the like, but the dual-frequency antenna of the invention does not exclude the matching use in any kind of electronic devices. In addition, the dual-band antenna of the invention does not exclude the self-operation to transmit and receive signals with the electronic device. In addition to the metal screw as a part of the antenna, the dual-band antenna of the present invention can be made of platinum, such as copper foil, or a metal member, such as an iron member or an aluminum alloy member. And the double-frequency antenna of this case passes through the setting of metal screw, reduces or avoids the antenna to set up the problem that the signal probably shields in the time of in electronic device, and its design difficulty can simplify when letting the antenna put in electronic device, and the design size of antenna also can reduce relatively moreover, and then lets the transmission effect of antenna signal also can be better.

The dual-band antenna of the present invention can also support a specific communication protocol to support, for example, multiple-input multiple-output (MIMO) communication technology when being installed in a mobile electronic device, and the mobile electronic device needs to install a dual-band antenna with two bands to implement the MIMO technology. The dual-frequency antenna with different frequency bands reduces or avoids the interference of the transmission of the antenna, reduces the size of the antenna and improves the efficiency of MIMO.

The dual-frequency antenna can be matched and designed aiming at different product applications, and is suitable for products which have no requirement on the overall thickness of a machine, such as industrial electronic machines, intelligent watches and the like.

Referring to fig. 1 and fig. 2, fig. 1 is a schematic structural diagram of a dual-band antenna according to an embodiment of the invention. Fig. 2 is a schematic structural diagram of a dual-band antenna combined with an electronic device according to an embodiment of the invention.

The present invention provides a dual-band antenna 1, which includes but is not limited to: a feed-in terminal 11, an annular connection terminal 12, a metal screw 13, a first extension path 14, a second extension path 15, a third extension path 16 and a grounding part 17, so as to form the radiator structure of the dual-band antenna 1.

In an embodiment, the feeding terminal 11 is used as a signal feeding terminal shared by the dual-band antenna 1, and one of the paths includes the feeding terminal 11, the loop connecting terminal 12 and the metal screw 13 to form a monopole antenna, and the other path includes the feeding terminal 11, the first to third extending paths 14, 15, 16 and the grounding portion 17 to form a loop antenna.

The annular connection end 12 has an opening 121, the annular connection end 12 is connected to the feeding end 11, and the screw head of the metal screw 13 is inserted into the opening 121, so that the metal screw 13 is electrically connected to the annular connection end 12. In an embodiment, the electrical conduction between the metal screw 13 and the annular connection end 12 may be performed by pressing the head of the metal screw 13 (the top of the metal screw 13) against the annular connection end 12 after the screw head of the metal screw 13 is inserted into the opening 121, and when the annular connection end 12 uses a copper foil tape, the copper foil portion and the head of the metal screw 13 are electrically conducted in a contact manner and are connected to the loop antenna.

The first extension path 14 is connected to the feeding end 11, and the first to third extension paths 14, 15, 16 are sequentially connected to each other, that is, the second extension path 15 is connected to the first extension path 14, and the third extension path 16 is connected to the second extension path 15. In an embodiment, the feeding end 11, the first to third extending paths 14, 15, 16 and the grounding portion 17 may be disposed in a manner of being electrically connected with each other but being segmented in sequence, or may be disposed in a manner of being integrally formed as a whole, and is not limited thereto.

Therefore, the ground portion 17 is connected to the third extending path 16 to adjust antenna Impedance Matching (Impedance Matching) characteristics. The widths, lengths and shapes of the first to third extending paths 14, 15 and 16 or the area and shape of the grounding portion 17 can be adjusted to achieve good impedance matching characteristics, so as to adjust the signal transceiving effect of the loop antenna or adapt to a specific operating frequency band.

In an embodiment, the feeding end 11, the first to third extending paths 14, 15, 16 and the grounding portion 17 may be connected in a long rectangular shape in sequence, but not limited thereto. The angle of each radiator is not limited by the attached drawings, and can be determined according to the actual space design requirement of the electronic product.

In an embodiment, included angles may be respectively disposed between the feeding end 11 and the first extending path 14, between the first extending path 14 and the second extending path 15, between the second extending path 15 and the third extending path 16, and between the third extending path 16 and the grounding portion 17, so as to significantly reduce the area and volume of the whole dual-band antenna 1.

In an embodiment, the monopole antenna and the loop antenna of the dual-band antenna 1 may be perpendicular to each other in the design of the antenna space, and particularly, the metal screw 13 and the loop antenna are perpendicular to each other, so that when the dual-band antenna 1 of the present invention is disposed inside the electronic device 200, the specific position of the dual-band antenna 1 may be configured according to the limited space of the electronic device 200, and when the monopole antenna and the loop antenna are configured inside the electronic device 200, the relative spatial placement relationship between the monopole antenna and the loop antenna is not limited, and the present invention is not limited thereto.

In one embodiment, the loop antenna is disposed in the electronic device 200 and includes a substrate in the form of a Flexible Printed Circuit (FPC), so that the loop antenna can be disposed in the electronic device 200 in a Flexible manner or an adhesive manner, but the rigid pcb is not excluded.

In an embodiment, the signal transmission mode of the dual-band antenna 1 of the present invention can be connected through an antenna signal feeder (feed line)100, and the signal feed terminal (feed)101 is connected to the feed terminal 11 of the dual-band antenna 1, and the signal ground terminal (ground)102 of the antenna signal feeder 100 is connected to the ground portion 17, so that the dual-band antenna 1 can perform signal transmission. In addition, the signal transmission of the dual-band antenna 1 of the present invention can also be provided by the signal processing circuit of the electronic device 200 after the dual-band antenna 1 is disposed on the electronic device 200, but the present invention is not limited thereto.

In an embodiment, the connection between the loop connection end 12 and the feeding end 11 of the dual-band antenna 1 may have an angular configuration, and further, the loop connection end 12 may include a complete loop and the feeding end 11 may include a complete rectangle and be connected to each other in an edge contact manner or partially fused with each other to adjust the current path, but the invention is not limited thereto.

In an embodiment, referring to fig. 3, fig. 3 is a schematic structural diagram illustrating a structure in which a metal screw of a monopole antenna of a dual-band antenna and a chassis of an electronic device are designed vertically and a structure in which a loop antenna and the chassis of the electronic device are designed horizontally according to an embodiment of the present invention.

When the dual-band antenna 1 is disposed in the electronic device 200, the metal screw 13 may be a screw used for fixing the electronic device 200. As shown in fig. 2 and fig. 3, after the head of the metal screw 13 of the monopole antenna is electrically contacted with the annular connection end 12, the metal screw 13 is locked on the circuit substrate 201 of the electronic device 200 (or on the housing of the electronic device 200), and the metal screw 13 is used as a part of the antenna radiator to save the area and volume occupied by the antenna.

In one embodiment, multiple sets of dual-band antennas 1 may be disposed at multiple peripheral locations of the electronic device 200, such as multiple corners of the electronic device 200, so as to be suitable for MIMO communication technology. Moreover, the metal screw 13 may be directly fixed to a position on the electronic device 200, such as the circuit board 201 or the chassis of the electronic device 200, or the metal screw 13 is fixed to the position on the electronic device 200 through the chassis of the electronic device 200, although the position where the metal screw 13 is fixed is only for illustration, according to the design form of the electronic device 200, the metal screw 13 may penetrate through the chassis of the electronic device 200 to fix the electronic device 200.

In one embodiment, the monopole antenna made by the metal screw 13 is designed to be vertical with respect to one side 202 of the housing of the electronic device 200, and the loop antenna is designed to be horizontal with respect to the other side 203 of the housing of the electronic device 200, so that the current directions of the two antennas are orthogonal (orthogonal), thereby making the overall antenna pattern coverage uniform and the antenna pattern without directivity.

In an embodiment, the metal screw 13 may be used as a part of the radiator of the monopole antenna, in addition to being directly used as (a part of) the antenna by the original fixing screw of the electronic device 200. The length and the width of the metal screw 13 are respectively 8mm and 4mm, and the metal screw is electrically connected with the copper foil tape of the annular connecting end 12 and electrically connected with the loop antenna on the side wall of the chassis of the electronic device 200, and the length of the metal screw 13 can be selected to be 6mm or 7 mm.

In one embodiment, the metal screw 13 is used as a part of the monopole antenna, when the length of the metal screw 13 is 8mm, the current path length is about 10mm (including the part of the copper foil path formed by the loop connection terminal 12), and the loop antenna current path length is about 20 mm. And when the length of the metal screw 13 is 6mm, the length of the monopole antenna current path is about 7.5mm (including the part of the copper foil path formed by the loop connection end 12), and the loop antenna current path length can be set to about 25mm, but not limited thereto. When the length of the metal screw 13 is set to be shorter, the metal screw is suitable for being applied to light and thin consumer electronic products.

In an embodiment, referring to fig. 4, fig. 4 shows a Reflection Coefficient (Reflection Coefficient) of a dual band antenna operating in a 3.125 to 5.5135GHz band according to an embodiment of the present invention. The frequency bands in the figure are only data that are actually obtained when the characteristics of the antenna are measured, and are not used to limit the characteristics and the operating frequency bands of the antenna. As can be seen from the illustration of fig. 4, the graph simulated by the reflection coefficient S11 shows that the impedance matching characteristic is good to improve the antenna transceiving effect, i.e. the effect below-10 dB can be exhibited when the operating bandwidth is 3.13 GHz-5.51 GHz, the bandwidth can completely cover the use frequency band (3.3 GHz-5 GHz) of the sub-6GHz communication system, wherein the reflection coefficient S11 can also be referred to as reflection Loss (Return Loss).

Referring to fig. 5 to 8, fig. 5 is a radiation pattern diagram of the dual-band antenna according to an embodiment of the invention, wherein the monopole antenna operates at 3.6GHz and the X-Y-Z axis is the front view. Fig. 6 is a diagram showing the radiation pattern of the monopole antenna of the dual-band antenna operating at 3.6GHz and having an X-Y-Z axis as a reverse viewing angle according to an embodiment of the present invention. Fig. 7 is a radiation pattern diagram of the loop antenna of the dual-band antenna according to an embodiment of the present invention operating at 4.6GHz and viewed from the front along the X-Y-Z axis. Fig. 8 is a diagram showing the radiation pattern of the loop antenna of the dual-band antenna operating at 4.6GHz and viewed from the opposite side in the X-Y-Z axis according to an embodiment of the present invention.

In one embodiment, the dual-band antenna 1 of the present invention supports a first resonance mode and a second resonance mode, i.e., the first resonance mode corresponds to the 3.6GHz band (fig. 5 and 6), and the second resonance mode corresponds to the 4.6GHz band (fig. 7 and 8). That is, the first resonant mode is a mode where the monopole antenna generates a quarter wavelength of about 3.6GHz, thereby resonating at 3.6GHz, and the second resonant mode is a mode where the loop antenna generates a half wavelength of about 4.6GHz, thereby resonating at 4.6 GHz. The frequency band corresponding to the resonance mode is not limited in the present invention. Furthermore, in order to make the dual-band antenna 1 of the present invention support two resonance modes simultaneously, the length of the overall resonance path of the dual-band antenna 1 needs to be designed, so that the resonance path of the dual-band antenna 1 can be configured to make the dual-band antenna 1 support a first resonance mode corresponding to a monopole antenna and a second resonance mode corresponding to a loop antenna simultaneously, and when the resonance condition is satisfied to improve the radiation gain of the antenna, for example, the present invention can provide the antenna gains of 0.3dBi and 0.6dBi at the operating bands of 3.6GHz and 4.6GHz, respectively.

[ possible technical effects of the invention ]

The technical effect of the invention is that the metal screw is used as a monopole antenna and combined with a loop antenna to form the operation of the antenna broadband, the frequency of the monopole antenna operation is about one quarter wavelength at 3.6GHz, and the frequency of the loop antenna operation is about one half wavelength at 4.6GHz, and the frequency band (3.3 GHz-5 GHz) used by the sub-6GHz communication system can be covered by combining the two bandwidths.

The broadband antenna can be suitable for electronic products with smaller volumes, and can be designed in the limited space of the electronic products. The metal screw is used as a branch of the monopole antenna, and a loop antenna is combined, so that the operating bandwidth of the monopole antenna can be very wide, the reflection loss can be below-10 dB, and the monopole antenna can cover the operating frequency band of 3.12 GHz-5.5 GHz.

The antenna can be combined with the existing screw in the limited space of an electronic product, the size of the antenna can be reduced (the space used by the antenna and the manufacturing cost of the antenna are relatively saved), and the antenna with a wide operating frequency band can be designed and can completely cover the frequency band required by sub-6 GHz. And the antenna gain is 0.3dBi and 0.6dBi respectively at 3.6GHz and 4.6GHz, the antenna efficiency is about 40% -50%, no directivity exists, the radiation pattern is uniform in all directions, and therefore, the antenna signal shielding problem is avoided when the antenna is applied to electronic products.

In addition, the loop antenna containing the FPC material is placed on the side edge of an electronic product such as a mobile phone, and a metal screw as a monopole antenna, the length and width of the metal screw being 8mm and 4mm, respectively, the copper foil tape being used as a contact portion between the antenna and the metal screw, when the metal screw is fixed on the electronic product (such as the shell), the metal screw is contacted with the metal copper foil, the antenna design mode can reduce the metal material required by the antenna, the operating frequency of the monopole antenna is a quarter wavelength and operates at 3.6GHz, the loop antenna of the other path of the dual-band antenna is attached to the side of the electronic product, so that the operating frequency is one half of the wavelength and operates at 4.6GHz, and the two operation modes are combined together to form a broadband application, and the operation bandwidth can be 3.3 GHz-5.5 GHz.

The invention can also match and design two antennas of the dual-frequency antenna according to different electronic product requirements, and can effectively reduce the design limitation caused by insufficient product space.

Finally, while in the foregoing specification, the present technology has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the scope of the present technology as defined by the following claims.