阅读说明：本技术 阵列天线及其安装板装置 (Array antenna and mounting plate device thereof ) 是由 王宇 陈宏亮 李明超 于 2020-12-24 设计创作，主要内容包括：本发明涉及一种阵列天线及其安装板装置,安装板装置包括反射板及设于反射板的反射器。反射板具有承载面,且承载面上形成有用于安装低频辐射单元及高频辐射单元的安装区域；反射器分布于安装区域的两侧,每个反射器具有沿反射斜面,且反射斜面相对于承载面倾斜设置。高频辐射单元及低频辐射单元发出的电磁波信号向外辐射,在碰到天线罩时,部分电磁波信号便会朝反射板反射。由于反射斜面的存在,部分反射的电磁波信号经过再次反射后将朝斜向反射,从而避免了反射的电磁波信号与高频辐射单元发出的电磁波信号在高频辐射单元正前方的一定角度范围内发生叠加。如此,可有效地避免高频辐射单元的方向图产生畸形波纹效应,从而改善天线性能。(The invention relates to an array antenna and a mounting plate device thereof. The reflecting plate is provided with a bearing surface, and an installation area for installing the low-frequency radiation unit and the high-frequency radiation unit is formed on the bearing surface; the reflectors are distributed on two sides of the mounting area, each reflector is provided with a reflection inclined surface, and the reflection inclined surfaces are obliquely arranged relative to the bearing surface. The electromagnetic wave signals emitted by the high-frequency radiation unit and the low-frequency radiation unit are radiated outwards, and when the electromagnetic wave signals touch the antenna cover, part of the electromagnetic wave signals are reflected towards the reflecting plate. Due to the existence of the reflection inclined plane, part of the reflected electromagnetic wave signals are reflected towards the oblique direction after being reflected again, so that the reflected electromagnetic wave signals and the electromagnetic wave signals sent by the high-frequency radiation unit are prevented from being superposed in a certain angle range right in front of the high-frequency radiation unit. Therefore, the directional diagram of the high-frequency radiation unit can be effectively prevented from generating the malformed ripple effect, and the performance of the antenna is improved.)

1. The mounting plate device is characterized by comprising a reflecting plate and a reflector arranged on the reflecting plate, wherein the reflecting plate is provided with a bearing surface, and a mounting area for mounting a low-frequency radiation unit and a high-frequency radiation unit is formed on the bearing surface; the reflectors are distributed on two sides of the installation area in the first direction, each reflector is provided with a reflection inclined surface extending along the second direction perpendicular to the first direction, and the reflection inclined surfaces are obliquely arranged relative to the bearing surface.

2. The mounting plate assembly of claim 1, wherein the angle between the reflective bevel and the bearing surface is 30 to 45 degrees.

3. The mounting plate assembly of claim 1, wherein the reflector is formed with a plurality of slots through the reflective angled surface.

4. The mounting plate assembly of claim 3, wherein a plurality of the slits are distributed along the second direction on the reflective slope, each of the slits is U-shaped, and openings of two adjacent slits are opposite and are sleeved with each other.

5. The mounting board assembly according to claim 3, wherein the length of each slit is less than a quarter wavelength of a central frequency point of the high-frequency radiating element.

6. The mounting board assembly according to claim 5, wherein the sum of the lengths of the plurality of slits is equal to one-half wavelength of the center frequency point of the low frequency radiating element.

7. The mounting plate device of claim 1, wherein the reflector comprises a support plate parallel to the bearing surface and a tilted plate disposed on the support plate and tilted with respect to the support plate, and the reflective slope is formed on a surface of the tilted plate.

8. The mounting plate device according to any one of claims 1 to 7, wherein each of the reflectors has one of the reflecting slopes, and the width of the reflecting slope is equal to a quarter wavelength of a central frequency point of the high-frequency radiating element.

9. The mounting plate device according to any one of claims 1 to 7, wherein each reflector comprises three parallel and spaced reflection slopes, and the widths of the three reflection slopes are equal to a quarter wavelength of the start frequency point, the center frequency point and the cut-off frequency point of the high-frequency radiating unit, respectively.

10. An array antenna, comprising:

the mounting plate assembly of any one of claims 1 to 9; and

the high-frequency radiating units and the low-frequency radiating units are arranged in the mounting area, and the low-frequency radiating units are embedded between the high-frequency radiating units.

Technical Field

The invention relates to the technical field of wireless communication, in particular to an array antenna and a mounting plate device thereof.

Background

With the large-scale commercial use of 5G mobile communication systems, a plurality of communication systems, such as a phenomenon of coexistence of 5G and 4G, appear in most base stations. The base station antenna composed of the independent 4G multi-frequency antenna and the independent 5G antenna has a series of problems of large volume, difficult debugging and the like, so that the nested array antenna with the 4G antenna and the 5G antenna fused with each other is produced.

The conventional 5G antenna comprises an antenna housing, a reflector plate, a 5G antenna sub-array, a spacer bar, a back calibration network circuit and the like. In an array antenna combining a 4G antenna and a 5G antenna, a 4G radiating element needs to be embedded in a 5G antenna sub-array. Thus, the reflector of the fused array antenna is wider and the antenna housing is higher compared with the traditional 5G antenna. Finally, these changes can produce a misshapen ripple effect on the pattern of the 5G antenna subarray, resulting in poor performance of the array antenna.

Disclosure of Invention

In view of the above, it is desirable to provide an array antenna and a mounting board device thereof capable of improving antenna performance.

A mounting plate device comprises a reflecting plate and a reflector arranged on the reflecting plate, wherein the reflecting plate is provided with a bearing surface, and a mounting area for mounting a low-frequency radiation unit and a high-frequency radiation unit is formed on the bearing surface; the reflectors are distributed on two sides of the installation area in the first direction, each reflector is provided with a reflection inclined surface extending along the second direction perpendicular to the first direction, and the reflection inclined surfaces are obliquely arranged relative to the bearing surface.

In one embodiment, the included angle between the reflection inclined plane and the bearing surface is 30-45 degrees.

In one embodiment, the reflector is formed with a plurality of slits through the reflective slopes.

In one embodiment, the plurality of slits are distributed on the reflection inclined plane along the second direction, each slit is U-shaped, and openings of two adjacent slits are opposite in opposite directions and are sleeved with each other.

In one embodiment, the length of each gap is less than a quarter wavelength of a central frequency point of the high-frequency radiation unit.

In one embodiment, the sum of the lengths of the plurality of gaps is equal to one-half wavelength of the central frequency point of the low-frequency radiating unit.

In one embodiment, the reflector includes a supporting plate parallel to the bearing surface and an inclined plate disposed on the supporting plate and inclined with respect to the supporting plate, and the reflecting inclined surface is formed on a surface of the inclined plate.

In one embodiment, each reflector has one reflecting inclined surface, and the width of the reflecting inclined surface is equal to a quarter wavelength of a central frequency point of the high-frequency radiation unit.

In one embodiment, each reflector includes three reflecting inclined planes arranged in parallel and at intervals, and widths of the three reflecting inclined planes are respectively equal to a quarter wavelength of an initial frequency point, a central frequency point and a cut-off frequency point of the high-frequency radiation unit.

An array antenna, comprising:

the mounting plate arrangement as described in any of the above preferred embodiments; and

the high-frequency radiating units and the low-frequency radiating units are arranged in the mounting area, and the low-frequency radiating units are embedded between the high-frequency radiating units.

According to the array antenna and the mounting plate device thereof, electromagnetic wave signals emitted by the high-frequency radiation unit and the low-frequency radiation unit radiate outwards, and when the array antenna touches the antenna housing, part of the electromagnetic wave signals are reflected towards the reflecting plate. Due to the existence of the reflection inclined plane, part of the reflected electromagnetic wave signals are reflected towards the oblique direction after being reflected again, so that the reflected electromagnetic wave signals and the electromagnetic wave signals sent by the high-frequency radiation unit are prevented from being superposed in a certain angle range right in front of the high-frequency radiation unit. Therefore, the directional diagram of the high-frequency radiation unit can be effectively prevented from generating the malformed ripple effect, and the performance of the antenna is improved.

Drawings

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

FIG. 1 is a schematic diagram of an array antenna according to a preferred embodiment of the present invention;

fig. 2 is a cross-sectional view of the array antenna of fig. 1 taken along a first direction;

FIG. 3 is a top view of a reflector in one embodiment of the invention;

FIG. 4 is a cross-sectional view of the reflector of FIG. 3 taken along a first direction;

FIG. 5 is a cross-sectional view of a reflector in a first direction in accordance with another embodiment of the present invention;

fig. 6 is a schematic diagram of a simulation of a high frequency radiation element pattern in the array antenna shown in fig. 1;

fig. 7 is a simulation diagram of a high-frequency radiation element pattern in a conventional array antenna.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Referring to fig. 1, the present invention provides an array antenna 10 and a mounting board apparatus 100. The array antenna 10 includes a mounting board device 100, a high frequency radiation unit 200, and a low frequency radiation unit 300.

The mounting board device 100 is used to mount and carry the high frequency radiating unit 200 and the low frequency radiating unit 300, specifically, in the present embodiment, the high frequency radiating unit 200 is used in a 5G communication band, and the low frequency radiating unit 300 is used in a 4G communication band. The high-frequency radiating units 200 are generally arranged in an array, and the low-frequency radiating unit 300 is embedded between the high-frequency radiating units 200. Specifically, in this embodiment, 3 high-frequency radiation units 200 form a 5G antenna sub-array, and the mounting board apparatus 100 is provided with 32 5G antenna sub-arrays in total, including 4 rows and 8 columns.

To prevent mutual interference between the multiple 5G antenna sub-arrays, two adjacent 5G antenna sub-arrays are separated by a spacer 400. The isolation strip 400 is mainly used for constraining the directional diagram of the 5G antenna subarray and realizing the homopolarity and heteropolarity coupling degree indexes of the 5G antenna subarray.

In addition, to realize normal signal transceiving, the array antenna 10 further includes a calibration network (not shown) disposed on the back surface of the mounting board apparatus 100. The calibration network is provided with 32 or 64 connectors, and the connectors are electrically connected with the 5G antenna subarray through the feeding pins, so that the 5G antenna subarray is fed.

Referring to fig. 2, the mounting board apparatus 100 of the preferred embodiment of the present invention includes a reflective board 110 and a reflector 120.

The reflective plate 110 may be a metal plate or a dielectric plate with a metalized surface, and may reflect electromagnetic wave signals. The reflective plate 110 is generally in the shape of a long strip to match the desired shape of the array antenna 10. The reflective plate 110 includes a bottom plate 111 and side plates 112 vertically disposed at two opposite edges of the bottom plate 111, and the bottom plate 111 and the side plates 112 are integrally formed. The base plate 111 is generally rectangular to allow the outer profile of the array antenna 10 to be regular for ease of layout.

The reflective plate 110 has a carrying surface 113. Specifically, the carrying surface 113 is disposed on the surface of the bottom plate 111. The mounting surface 113 is formed with a mounting area for mounting the low-frequency radiating element 300 and the high-frequency radiating element 200.

The reflector 120 is provided on the reflection plate 110. Specifically, the reflector 120 may be connected to the reflective plate 110 by welding, clamping, or the like, or the reflective plate 110 may be integrally formed. Wherein the reflectors 120 are distributed on both sides of the mounting area in the first direction. That is, the number of the reflectors 120 is at least two. Also, each reflector 120 has a reflective slope 121 extending in the second direction. The second direction is perpendicular to the first direction, which is referred to as the horizontal direction and the second direction is the direction perpendicular to the plane of the drawing, as shown in fig. 2.

Also, the reflecting slope 121 is obliquely disposed with respect to the carrying surface 113. That is, the reflection slope 121 is not parallel to the supporting surface 113, and is not perpendicular to the supporting surface 113.

When the array antenna 10 operates, the high-frequency radiation unit 200 radiates an electromagnetic wave signal emitted by excitation of a high-frequency current and radiates the electromagnetic wave signal outward. When the antenna cover is touched, part of the electromagnetic wave signal is reflected and is incident toward the reflective plate 110. Further, a part of the reflected electromagnetic wave signal is directed perpendicularly to the surface of the reflection plate 110. If the part of the electromagnetic wave signal is reflected by the reflection plate 110, the propagation direction of the part of the electromagnetic wave signal is turned by 180 degrees, so that a straight-up and straight-down reflection line is formed between the radome and the reflection plate 110.

In the conventional array antenna, the reflected electromagnetic wave signals from the top and the bottom directly overlap with the electromagnetic wave signals from the high frequency radiating unit 200 within a certain angle range right in front of the high frequency radiating unit 200, so that the directional pattern of the high frequency radiating unit 200 is rippled within a certain range (generally, within a direction of ± 30 °), and when the amplitude of the ripple exceeds 3dB, the gain and the direction of the synthesized directional pattern are directly affected, resulting in poor antenna performance.

As shown in fig. 7, the high frequency pattern of the conventional array antenna has a very significant level front ripple, which is greater than 3d B, resulting in a lobe width of only 39.8 degrees.

In the array antenna 10 in this embodiment, due to the existence of the reflection inclined plane 121, the electromagnetic wave signal incident toward the reflection plate 110 is blocked by the reflection inclined plane 121 and is emitted obliquely after being reflected by the reflection inclined plane 121, so that a straight-up and straight-down reflection line is prevented from being formed between the antenna cover and the reflection plate 110 by the high-frequency electromagnetic wave signal, and the reflected electromagnetic wave signal and the electromagnetic wave signal emitted by the high-frequency radiation unit 200 are prevented from being superimposed within a certain angle range right in front of the high-frequency radiation unit 200. Thus, the directional diagram of the high-frequency radiating unit 200 can be effectively prevented from generating the malformed ripple effect, thereby improving the antenna performance.

As shown in fig. 6, the horizontal plane of the directional diagram of the 5G antenna subarray in the array antenna 10 is smooth and free from ripple phenomenon, and the lobe width reaches 105 degrees.

In the present embodiment, the included angle between the reflection slope 121 and the carrying surface 113 is 30 to 45 degrees. Since the superposition of the high-frequency electromagnetic wave signals generally occurs within a range of ± 30 ° in front of the radiation surface of the high-frequency radiation unit 200, and the included angle between the reflection inclined surface 121 and the bearing surface 113 is set to be 30 to 45 degrees, the reflected high-frequency electromagnetic wave signals can just avoid the above range. Therefore, the performance improvement for the array antenna 10 is more significant.

Referring to fig. 3 to 5, in the present embodiment, the reflector 120 includes a supporting plate 122 and a tilted plate 123. The supporting plate 122 is parallel to the bearing surface 113, the inclined plate 123 is disposed on the supporting plate 122 and is inclined with respect to the supporting plate 122, and the reflective inclined surface 121 is formed on the surface of the inclined plate 123.

Specifically, the supporting plate 122 and the sloping plate 123 are generally strip-shaped plate-shaped structures, and both can be integrally formed. The sloping plate 123 may be a metal plate or a dielectric plate with a metalized surface. When the device is installed, the supporting plate 122 is attached to the supporting surface 113. Thus, the angle between the tilted plate 123 and the supporting plate 122 is equal to the angle between the reflecting slope 121 and the carrying surface 121. Therefore, the reflector 120 may be mounted to the reflection plate 110 after the angle between the tilted plate 123 and the support plate 122 is adjusted to a desired angle, so that the assembly of the array antenna 10 is facilitated.

Each reflector 120 may include one or more reflective bevels 121. As shown in fig. 3, in one embodiment, each reflector 120 has a reflecting slope 121, and the width of the reflecting slope 121 is equal to a quarter wavelength of the center frequency point of the high-frequency radiating unit 200.

Specifically, the reflector 120 may be provided with a tilted plate 123, thereby forming a reflecting slope 121. The above width refers to a dimension of the reflective slope 121 in a direction perpendicular to the second direction. Since the high frequency electromagnetic wave signal is obliquely reflected by only one reflection slope 121, the reflector 120 has a simple structure. Moreover, the width of the inclined plane 121 is equal to a quarter wavelength of the central frequency point of the high-frequency radiation unit 200, so that most of the electromagnetic wave signals emitted by the high-frequency radiation unit 200 can be smoothly reflected by the inclined plane 121, and the requirement for improving the performance of the antenna can be met.

In another embodiment, as shown in fig. 5, each reflector 120 includes three parallel reflective inclined planes 121 disposed at intervals, and widths of the three reflective inclined planes 121 are equal to a quarter wavelength of a start frequency point, a center frequency point, and a cut-off frequency point of the high-frequency radiating unit 200, respectively.

Specifically, three tilted plates 123 may be disposed on the reflector 120, so as to obtain three reflecting inclined planes 121. The reflection inclined planes 121 with different widths can better reflect electromagnetic wave signals with different frequency points. The above difference exists due to the widths of the three reflective slopes 121. Therefore, the three reflection slopes 121 are matched to each other, so that a better reflection effect can be achieved on electromagnetic wave signals of the start frequency point, the center frequency point and the cut frequency point of the high-frequency radiation unit 200, and the improvement effect on directional diagram ripples of the high-frequency radiation unit 200 is better.

Referring to fig. 3 again, in order to improve the pattern of the high frequency radiating element 200 and reduce the influence on the pattern of the low frequency radiating element 300, in the present embodiment, the reflector 120 is formed with a plurality of slits penetrating the reflecting slope 121.

The wavelength of the high-frequency electromagnetic wave signal is shorter, and the diffraction phenomenon is less obvious, so the diffraction performance is poorer; the wavelength of the low-frequency electromagnetic wave signal is longer, and the diffraction phenomenon is more obvious, so the diffraction performance is better. The slit 1211 is disposed such that the reflection slope 121 can allow the low frequency electromagnetic wave signal to pass through while blocking the high frequency electromagnetic wave signal. The high frequency electromagnetic wave signal emitted from the high frequency radiating unit 200 is reflected by the reflecting slope 121, and the low frequency electromagnetic wave signal emitted from the low frequency radiating unit 300 smoothly passes through the reflecting slope 121 and is reflected by the reflecting plate 100. Therefore, the arrangement of the slit 1211 makes the low frequency electromagnetic wave signal have a wave-transparent effect, and the reflector 120 has a small influence on the directional pattern of the low frequency radiation unit 300.

Specifically, in the present embodiment, the plurality of slits 1211 are distributed on the reflection inclined surface 121 along the second direction, each slit 1211 is U-shaped, and the openings of two adjacent slits 1211 are opposite and are sleeved with each other.

Slot 1211 is U-shaped, meaning that slot 1211 extends along a U-shaped path, has two branches, and the two branches form an opening of slot 1211 therebetween. The two slots 1211 are nested with one another, meaning that one branch of one slot 1211 is inserted into the opening of the other slot 1211. Thus, the distribution density of the plurality of slits 1211 on the reflection inclined surface 121 is high, and the wave-transparent effect for the low-frequency electromagnetic wave signal is more obvious.

The reflecting slope 121 shown in fig. 3 has 14U-shaped slits 1211, wherein 7 slits 1211 are open downward, and the other 7 slits 1211 are open upward. It should be noted that in other embodiments, the slot 1211 can have other shapes. Such as a strip, a continuous S-shape, etc.

Further, in the present embodiment, the length of each slit 1211 is smaller than a quarter wavelength of the center frequency point of the high-frequency radiating unit 200.

The length of the slit 1211 refers to a dimension in an extending direction thereof. For example, for a U-shaped slot 1211, the length refers to the length in the direction of the U-shape. With such an arrangement, the high-frequency electromagnetic wave signal emitted from the high-frequency radiation unit 200 cannot form a diffraction effect on the reflection slope 121, and the blocking effect on the high-frequency electromagnetic wave signal is better.

Further, in the present embodiment, the sum of the lengths of the plurality of slits 1211 is equal to one-half wavelength of the center frequency point of the low frequency radiating unit 300.

The sum of the lengths means that the lengths of all the slits 1211 on the reflection slope 121 are added. For example, if the reflection slope 121 shown in fig. 3 has 14 slits 1211, the sum of the lengths is the sum of the lengths of the 14 slits 1211. With such an arrangement, the reflection inclined plane 121 has a better wave-transparent effect on the low-frequency electromagnetic wave signals emitted by the low-frequency radiation unit 300, and the influence on the directional diagram of the low-frequency radiation unit 300 is further reduced.

In the array antenna 10 and the mounting panel apparatus 100 thereof, the electromagnetic wave signals emitted by the high frequency radiation unit 200 and the low frequency radiation unit 300 are radiated outward, and when the electromagnetic wave signals hit the radome, a part of the electromagnetic wave signals are reflected toward the reflection plate 110. Due to the existence of the reflection inclined plane 121, the partially reflected electromagnetic wave signal is reflected obliquely after being reflected again, so that the reflected electromagnetic wave signal and the electromagnetic wave signal emitted by the high-frequency radiation unit 200 are prevented from being superimposed within a certain angle range right in front of the high-frequency radiation unit 200. Thus, the directional pattern of the high-frequency radiating element 200 can be effectively prevented from generating the malformed moire effect, thereby improving the antenna performance of the array antenna 10.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.