Multi-frequency antenna array

Abstract

The utility model discloses a multi -frequency antenna array, including reflector, phase shifter, a plurality of high frequency oscillator, a plurality of low frequency oscillator and a plurality of switching assembly, switching assembly includes feed network, filter circuit and ground circuit, phase shifter sets up at the back of reflector, high frequency oscillator is arranged into several high frequency arrays on the front of reflector, and low frequency oscillator is arranged into several low frequency arrays on the front of reflector, feed network is connected with high frequency oscillator respectively and the phase shift circuit connection of phase shifter, filter circuit is connected with low frequency oscillator, ground circuit is connected with feed network and extends to high frequency oscillator back, and ground circuit is connected with the cavity of phase shifter, can effectively complete feed through above -mentioned structure, and prolongs ground and can effectively filter out the interference between oscillator, can reduce the area required to array and reflector, greatly reduces the overall investment cost, needs the selection requirement of array and oscillator to be lower under the same condition, has compact structure, easy to realize's advantage.

Description

Technical Field

[0001] This utility model relates to the field of antennas, and in particular to a multi-frequency antenna array. Background Technology

[0002] In traditional array structures, high- and low-frequency vibrators are prone to mutual interference, leading to unstable performance. The causes and effects of this mutual interference mainly include electromagnetic signal attenuation, co-frequency interference, and physical obstacles. Generally, to avoid interference, sufficient space isolation between antennas is required. In this case, a large reflector area is needed, which increases the spacing between the vibrators. The principle is that the electromagnetic waves generated by one vibrator attenuate when they reach the field of another vibrator. The attenuation increases with distance until it reaches a certain value, at which point the attenuation becomes too large to cause a significant impact. The disadvantages of this approach are that the array and reflector require a larger area, resulting in higher costs and weaker mutual interference between vibrators of different frequency bands. Therefore, a multi-frequency antenna array is urgently needed to solve the above problems. Utility Model Content

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a multi-frequency antenna array.

[0004] The technical solution adopted by one embodiment of this utility model to solve its technical problem is: a multi-frequency antenna array, including a reflector, a phase shifter, multiple high-frequency vibrators, multiple low-frequency vibrators, and multiple transition components, wherein the transition components include a feed network, a filter circuit, and a grounding circuit;

[0005] The phase shifter is located on the back of the reflector;

[0006] High-frequency oscillators are arranged in a high-frequency array on the front of the reflector, and low-frequency oscillators are arranged in a low-frequency array on the front of the reflector.

[0007] The power supply network is connected to the high-frequency oscillator and the phase-shifting circuit of the phase shifter, respectively.

[0008] The filter circuit is connected to the low-frequency oscillator;

[0009] The grounding circuit is connected to the power supply network and extends away from the high-frequency oscillator. The grounding circuit is connected to the cavity of the phase shifter.

[0010] As one of the preferred embodiments of this utility model, a dielectric plate is provided on the front side of the reflector, a power supply network is provided on the front side of the dielectric plate, and a filter circuit and a grounding circuit are provided on the back side of the dielectric plate.

[0011] In one of the preferred embodiments of this utility model, the grounding circuit is composed of a metal strip.

[0012] In one of the preferred embodiments of this utility model, the grounding circuit is connected to the cavity of the phase shifter through a coupling structure.

[0013] In one of the preferred embodiments of this utility model, the coupling structure is configured as a coupling plate.

[0014] As one of the preferred embodiments of this utility model, two high-frequency arrays are arranged on both sides of a low-frequency array to form a sub-array.

[0015] As one of the preferred embodiments of this utility model, the high-frequency oscillators and low-frequency oscillators in the same subarray are staggered in the extension direction of the array.

[0016] As one of the preferred embodiments of this utility model, the high-frequency oscillators and low-frequency oscillators in two adjacent subarrays are staggered in the extension direction of the array.

[0017] The beneficial effects of this utility model are as follows: The multi-frequency antenna array includes a reflector, a phase shifter, multiple high-frequency vibrators, multiple low-frequency vibrators, and multiple adapter components. The adapter components include a feeding network, a filtering circuit, and a grounding circuit. The phase shifter is located on the back of the reflector. The high-frequency vibrators are arranged in several high-frequency arrays on the front of the reflector, and the low-frequency vibrators are arranged in several low-frequency arrays on the front of the reflector. The feeding network is connected to the high-frequency vibrators and the phase shifting circuit of the phase shifter. The filtering circuit is connected to the low-frequency vibrators. The grounding circuit is connected to the feeding network and extends away from the high-frequency vibrators. The grounding circuit is connected to the cavity of the phase shifter. The above structure can effectively complete the feeding, and the extended grounding can effectively filter out the interference between the vibrators. It can reduce the area required for the array and reflector, greatly reduce the overall investment cost, and under the same conditions, the selection requirements for the array and vibrators are lower. It has the advantages of compact structure and easy implementation. Attached Figure Description

[0018] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0019] Figure 1 This is a schematic diagram of the first structure of a first embodiment of a multi-frequency antenna array;

[0020] Figure 2 This is a schematic diagram of the second structure of the first embodiment of the multi-frequency antenna array;

[0021] Figure 3 This is an exploded view of a portion of the structure of the first embodiment of the multi-frequency antenna array;

[0022] Figure 4 This is a schematic diagram of the first structure of the second embodiment of the multi-frequency antenna array;

[0023] Figure 5This is a schematic diagram of the second structure of the second embodiment of the multi-frequency antenna array;

[0024] Figure 6 This is an exploded view of a portion of the structure of the second embodiment of the multi-frequency antenna array;

[0025] Figure 7 A comparison diagram of the peak directivity coefficients of the first embodiment of the multi-frequency antenna array;

[0026] Figure 8 This is a comparison diagram of the peak directivity coefficients of the second embodiment of the multi-frequency antenna array. Detailed Implementation

[0027] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0028] In the description of this utility model, "multiple" means two or more; "greater than," "less than," and "exceeding" are understood to exclude the stated number; "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly specifying the number of indicated technical features or their sequential relationship.

[0029] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0030] In this utility model, unless otherwise explicitly defined, the terms "setting," "installing," and "connecting" should be interpreted broadly. For example, they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to a fixed connection, a detachable connection, or an integral molding; they can refer to a mechanical connection; they can refer to the internal connection of two components or the interaction between two components. Those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0031] Reference Figures 1 to 6The multi-frequency antenna array includes a reflector 10, a phase shifter 20, multiple high-frequency vibrators 31, multiple low-frequency vibrators 32, and multiple transition components 40. The transition components 40 include a feed network 41, a filter circuit 42, and a grounding circuit 43.

[0032] The phase shifter 20 is disposed on the back of the reflector 10;

[0033] High-frequency oscillators 31 are arranged in several high-frequency arrays 31A on the front side of the reflector 10, and low-frequency oscillators 32 are arranged in several low-frequency arrays 32A on the front side of the reflector 10.

[0034] The power supply network 41 is connected to the high-frequency oscillator 31 and the phase shifting circuit 21 of the phase shifter 20, respectively;

[0035] The filter circuit 42 is connected to the low-frequency oscillator 32;

[0036] The grounding circuit 43 is connected to the power supply network 41 and extends away from the high-frequency oscillator 31. The grounding circuit 43 is connected to the cavity 22 of the phase shifter 20.

[0037] Reference Figures 1-3 In the first embodiment of this utility model, a dielectric plate 50 is disposed on the front side of the reflector 10, a power supply network 41 is disposed on the front side of the dielectric plate 50, and a filter circuit 42 and a grounding circuit 43 are disposed on the back side of the dielectric plate 50. Specifically, one low-frequency vibrator 32 is arranged in a low-frequency array 32A on the reflector 10, and four high-frequency vibrators 31 are arranged in two groups on both sides of the low-frequency array 32A to form two high-frequency arrays 31A. Two phase shifters 20 are distributed on the back side of the reflector 10. The adapter assembly 40 is connected to the power supply points, and after powering the two high-frequency arrays 31A respectively, the two power supply points of the low-frequency vibrators 32 are connected to the front side of the reflector 10 for power supply. The filter circuit 42 included in the adapter assembly 40 can effectively filter out high-frequency interference to low-frequency interference. Preferably, as shown in the figure, Figure 3 As shown, after the phase shifter 20 is connected to the adapter assembly 40, it is directly connected to the low-frequency vibrator 32 by the filter circuit 42. The high-frequency vibrator 31 is connected to the filter circuit 42 through the feed network 41. The microstrip line on the high-frequency vibrator 31 is connected to the metal strip line. The grounding circuit 43 extends the physical length of the circuit, thereby extending the current path between the high-frequency vibrator 31 and the reflector 10. In a further embodiment, the total length of the high-frequency vibrator 31, the feed network 41, and the grounding circuit 43 is 1 / 4 wavelength of the operating frequency band of the high-frequency vibrator 31. It should be noted that after the high-frequency vibrator 31 is connected to the feed network 41, it is connected to the phase shifting circuit of the phase shifter 20 by the feed line 70. The feed line 70 is located on the front of the dielectric plate 50 and extends away from the high-frequency vibrator 31, so that the length of the feed line 70 is also extended, increasing the effective distance of the current, thereby filtering out the interference between the high-frequency vibrator 31 and the low-frequency vibrator 32.

[0038] Reference Figure 7 Compared to the existing scheme where the high-frequency vibrator 31 is directly connected downwards to the cavity 22 of the phase shifter 20, the antenna array provided by this utility model effectively implements extended grounding. Preferably, the solid line represents the result of extended grounding in the radiation diagram, where the peak directivity coefficient increases with frequency, gradually increasing from 8.1dB to 8.4dB and remaining above 8.1dB. The dashed line represents the result of direct downward grounding in the radiation diagram, where the peak directivity coefficient does not reach 7.7dB. In summary, within the operating frequency range of 0.698-0.960GHz, the result of direct downward grounding is 0.5dB lower than that of extended grounding. Compared to the existing scheme, the peak directivity coefficient of the antenna array provided by this utility model remains stable even as the frequency increases.

[0039] Reference Figures 4-6 In the second embodiment of this utility model, the grounding circuit 43 is made of metal strip wire. A hole is drilled in the reflector 10. The high-frequency vibrator 31 is connected to the cavity 22 of the phase shifter 20 below the reflector 10 after the distance is extended through the grounding circuit 43 made of metal strip wire. After the phase shifter 20 is connected to the conversion component 40, the filter circuit 42 is directly connected to the low-frequency vibrator 32. Compared with the existing solution where the high-frequency vibrator 31 is directly connected to the cavity 22 of the phase shifter 20, the antenna array provided by this utility model effectively implements extended grounding, which can reduce the mutual interference between the high-frequency vibrator 31 and the low-frequency vibrator 32 without increasing the area of ​​the reflector 10 and without significantly increasing the cost, making the array structure more stable and resulting in no distortion.

[0040] Reference Figure 8 The solid line represents the result of extended grounding in the radiation diagram. The peak directivity coefficient increases with frequency in the early stage and decreases in the later stage, but remains above 7.5dB within the required frequency range. It gradually increases from 7.5dB to 8.75dB in the 0.6-1GHz range, and decreases after 1.00GHz. The dashed line represents the result of direct downward grounding in the radiation diagram. The peak directivity coefficient does not reach 8.1dB and is relatively low in the 1.00-1.20GHz range. In summary, in the operating frequency range of 0.698-0.960GHz, the result of direct downward grounding is about 1dB lower than that of extended grounding, and the result of extended grounding is better across the entire frequency band. In addition, the peak directivity coefficient of the antenna array provided by this utility model remains stable even as the frequency increases compared to existing solutions.

[0041] Preferably, the high-frequency oscillator 31 and / or the low-frequency oscillator 32 can be made of various possible materials, such as sheet metal or PCB.

[0042] ReferenceFigures 4-6 In some embodiments, the high-frequency oscillator 31 contains a layer of guide plate, the balun has a vertical structure, and achieves dual-polarized radiation along ±45° directions. The oscillator surface is parallel to the reflector 10. There are two feed points at the bottom of the vertical structure. After the adapter assembly 40 connects the two feed points, it is connected to the feed structure on the back of the reflector 10 and the phase shifter 20. The adapter assembly 40 feeds the oscillator through the balun.

[0043] Reference Figures 4-6 In some embodiments, the grounding circuit 43 is connected to the cavity 22 of the phase shifter 20 through the coupling structure 60. Preferably, the coupling structure 60 is set as a coupling plate. Coupled grounding has the advantages of low cost, simple implementation and wide applicability. The grounding method is flexible and unrestricted, and the structure is compact and easy to implement. It can reduce the area required for the array and reflector 10. The layout of different grounding methods of this utility model is not limited to the above-mentioned distribution. Other layouts can be adopted according to local conditions.

[0044] Reference Figures 1-2 and Figures 4-5 In some embodiments, two columns of high-frequency arrays 31A are arranged on both sides of a column of low-frequency arrays 32A to form a subarray 30; in other embodiments, the high-frequency oscillators 31 and low-frequency oscillators 32 in the same subarray 30 are staggered in the extension direction of the array; in a further embodiment, the high-frequency oscillators 31 and low-frequency oscillators 32 in two adjacent subarrays 30 are staggered in the extension direction of the array; this can reduce the mutual interference between the high-frequency oscillators 31 and low-frequency oscillators 32, making the array structure more stable.

[0045] The advantages of this utility model are: the above structure can effectively complete the power supply, and the extended grounding can effectively filter out the interference between the vibrators, reduce the area required for the array and reflector, greatly reduce the overall investment cost, and the selection requirements for the array and vibrators are lower under the same conditions. It has the advantages of compact structure and easy implementation.

[0046] Of course, this utility model is not limited to the above-described embodiments. Those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of this utility model. All such equivalent modifications and substitutions are included within the scope defined by the claims of this application.

Claims

1. A multi-frequency antenna array, characterized in that: It includes a reflector (10), a phase shifter (20), multiple high-frequency oscillators (31), multiple low-frequency oscillators (32), and multiple adapter components (40), wherein the adapter components (40) include a power supply network (41), a filter circuit (42), and a grounding circuit (43). The phase shifter (20) is disposed on the back of the reflector (10); The high-frequency oscillators (31) are arranged in a plurality of high-frequency arrays (31A) on the front side of the reflector (10), and the low-frequency oscillators (32) are arranged in a plurality of low-frequency arrays (32A) on the front side of the reflector (10). The power supply network (41) is connected to the high-frequency oscillator (31) and the phase shifting circuit (21) of the phase shifter (20); The filter circuit (42) is connected to the low-frequency oscillator (32); The grounding circuit (43) is connected to the power supply network (41) and extends away from the high-frequency vibrator (31). The grounding circuit (43) is connected to the cavity (22) of the phase shifter (20).

2. The multi-frequency antenna array according to claim 1, characterized in that: The reflector (10) has a dielectric plate (50) on its front side, the power supply network (41) is located on the front side of the dielectric plate (50), and the filter circuit (42) and the grounding circuit (43) are located on the back side of the dielectric plate (50).

3. The multi-frequency antenna array according to claim 1, characterized in that: The grounding circuit (43) is composed of metal strip wire.

4. The multi-frequency antenna array according to claim 1, characterized in that: The grounding circuit (43) is connected to the cavity (22) of the phase shifter (20) through a coupling structure (60).

5. The multi-frequency antenna array according to claim 4, characterized in that: The coupling structure (60) is configured as a coupling plate.

6. The multi-frequency antenna array according to claim 1, characterized in that: The two columns of the high-frequency array (31A) are arranged on both sides of the column of the low-frequency array (32A) to form a subarray (30).

7. The multi-frequency antenna array according to claim 6, characterized in that: The high-frequency oscillator (31) and the low-frequency oscillator (32) in the same subarray (30) are staggered in the extension direction of the array.

8. The multi-frequency antenna array according to claim 6, characterized in that: The high-frequency oscillator (31) and the low-frequency oscillator (32) in two adjacent subarrays (30) are staggered in the extension direction of the array.

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