S-band circularly polarized array antenna

Abstract

The utility model provides an S-band circularly polarized array antenna, which comprises a radiator, a substrate, a plurality of radio frequency connectors and a power divider, and is characterized in that the plurality of radio frequency connectors are distributed on the substrate, and the power divider is used for controlling the signal amplitude of the radio frequency connectors; a plurality of radiators are arranged, the number of the radiators is the same as that of the radio frequency connectors, and the radiators are respectively communicated with the radio frequency connectors; the plurality of radiators are uniformly distributed on the substrate in a matrix shape, the power divider is used for controlling excitation current distributed to each radio frequency connector so as to control the signal amplitude of the radiators, and the signal amplitude of the radiators is in direct proportion to the excitation current; the S-band circularly polarized array antenna is simple in structure, and miniaturization of the antenna is realized under the condition that good bandwidth performance is ensured; the transverse distance and the longitudinal distance between the adjacent radiators are equal, mutual interference between the radiators is avoided, meanwhile, miniaturization of the antenna is considered, and the radiation efficiency is improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of antennas for communication systems, and more particularly relates to an S-band circularly polarized array antenna. BACKGROUND

[0002] Circularly polarized array antennas have important application value in modern communication and radar systems, and their design needs to consider factors such as array element selection, array arrangement, feed network, and phase control. Through reasonable design and optimization, circularly polarized array antennas can achieve high gain, beam control, and anti-multipath interference performance, meeting the needs of complex application scenarios.

[0003] Existing circularly polarized array antennas mainly have the following shortcomings: In order to achieve circularly polarized radiation, the phase and amplitude of each array element in the array need to be accurately controlled, which increases the complexity of the design; the feed network needs to ensure that each array element obtains the correct phase and amplitude, and the design of a complex feed network will increase the complexity and cost of the system. SUMMARY

[0004] The utility model aims at making up for the insufficient of prior art, provides a kind of standing wave array efficiency, bandwidth is narrow, miniaturized S-band circularly polarized array antenna, the technical scheme used in the present application is:

[0005] An S-band circularly polarized array antenna includes a radiator, a substrate, a radio frequency connector, and a power divider. The radio frequency connector is provided with a plurality of and distributed on the substrate, and the power divider is used to control the signal amplitude of the radio frequency connector. The radiator is provided with a plurality of, and the number of radiators is the same as the number of radio frequency connectors. The radiators are respectively connected with the radio frequency connectors. The radiators are uniformly distributed in a matrix on the substrate.

[0006] Optionally, the lateral distance d1 between adjacent radiators is equal.

[0007] Optionally, the longitudinal distance d2 between adjacent radiators is equal.

[0008] Optionally, the lateral distance d1 is equal to the longitudinal distance d2.

[0009] Optionally, the radiator is provided with a phase shifter, and the phase shifter is used to control the phase of the signal transmitted or received by the radiator.

[0010] Optionally, the radiator adopts a circular patch antenna.

[0011] Optionally, the edge of the radiator is provided with a first cut seam and a second cut seam, and the first cut seam and the second cut seam are oppositely arranged.

[0012] Optionally, the radiator is further provided with a feed pin, which is arranged between the radio frequency connector and the radiator and connects the radio frequency connector and the radiator.

[0013] Optionally, the antenna reflector is further included, the radio frequency connector is arranged on the antenna reflector, and the substrate is arranged between the antenna reflector and the radiator, and the feed pin passes through the antenna reflector and the substrate.

[0014] The advantages of the utility model are as follows:

[0015] The radiator is provided with a plurality of and is uniformly distributed in a matrix on the substrate, the power distributor is used for controlling the excitation current distributed to each radio frequency connector, and then the signal amplitude of the radiator is controlled, and the signal amplitude of the radiator is proportional to the size of the excitation current; the S frequency band circularly polarized array antenna of the application has simple structure, realizes the miniaturization of the antenna under the condition of guaranteeing the good bandwidth performance;

[0016] The horizontal and vertical distances between the radiators are same, mutual interference between the radiators is avoided, meanwhile, the miniaturization of the antenna is considered, and the radiation efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical scheme in the embodiment of the application, the drawings needed to be used in the embodiment or prior art description will be briefly introduced as follows, obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained without paying the creative labor for the person skilled in the art.

[0018] Figure 1 It is a top view of the S frequency band circularly polarized array antenna;

[0019] Figure 2 It is a bottom view of the S frequency band circularly polarized array antenna;

[0020] Figure 3 It is a schematic view of the S frequency band circularly polarized array antenna locally;

[0021] Figure 4 It is a schematic view of the working principle of the S frequency band circularly polarized array antenna.

[0022] Explanation of symbols in the drawing:

[0023] 1 is a radiator, 11 is a first cut seam, 12 is a second cut seam, 13 is a feed pin, 14 is a phase shifter, 15 is a target direction, and 16 is a beam direction;

[0024] 2 is a substrate;

[0025] 3 is a radio frequency connector;

[0026] 4 is an antenna reflector;

[0027] 5 is a power distributor. DETAILED DESCRIPTION

[0028] In order to make the technical problems, technical solutions and beneficial effects of the present application clearer, the present application will be further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not to limit the present application.

[0029] The S-band circularly polarized array antenna provided by the embodiment of the present application will be described. The S-band circularly polarized array antenna is as shown in the figure: Figures 1 to 3

[0030] An S-band circularly polarized array antenna, comprising a radiator 1 and a substrate 2, further comprising a radio frequency connector 3 and a power divider 5, the radio frequency connector 3 is provided with a plurality of and is distributed on the substrate 2, the power divider 5 is used to control the signal amplitude of the radio frequency connector 3; the radiator 1 is provided with a plurality of and is uniformly distributed in a matrix on the substrate 2, the number of the radiator 1 is the same as that of the radio frequency connector 3, and the radiator 1 is connected with the radio frequency connector 3 in communication respectively.

[0031] The radiator 1 is provided with a plurality of and is uniformly distributed in a matrix on the substrate 2, the power divider 5 is used to control the excitation current distributed to each radio frequency connector 3, thereby controlling the signal amplitude of the radiator 1, and the signal amplitude of the radiator 1 is proportional to the size of the excitation current; the S-band circularly polarized array antenna of the present application has a simple structure, realizes the miniaturization of the antenna under the condition of ensuring the good bandwidth performance.

[0032] The transverse distance d1 between the adjacent radiators 1 is equal.

[0033] The longitudinal distance d2 between the adjacent radiators 1 is equal.

[0034] The transverse distance d1 is equal to the longitudinal distance d2, and the transverse and vertical distances between the radiators 1 are the same; the mutual interference between the radiators 1 is avoided, the miniaturization of the antenna is taken into account at the same time, and the radiation efficiency is improved.

[0035] In the embodiment, the S-band circularly polarized array antenna further comprises an antenna reflector 4, the radio frequency connector 3 is arranged on the antenna reflector 4, and the antenna reflector 4 is used to install and fix the radio frequency connector 3; the substrate 2 is arranged between the antenna reflector 4 and the radiator 1, wherein the substrate 2 and the inner side of the antenna reflector 4 are mutually attached and fixed together by bolts, the radio frequency connector 3 is arranged on the outer side of the antenna reflector 4, the radiator 1 is arranged on the outer side of the substrate 2, and the feed pin 13 penetrates through the antenna reflector 4 and the substrate 2.

[0036] As shown in the figures: Figure 3 and Figure 4 ​As shown, the radiator 1 is provided with a phase shifter 14, which controls the phase of the signal transmitted or received by the radiator 1 by changing the in-array phase shift value between adjacent elements in the array, so that the beam direction 16 matches the target direction 15; the phase shifter 14 can ensure that the beam direction of the radiator 1 is rapid and flexible, without the need for mechanical movement to adjust the beam direction like ordinary array antennas or reflector antennas. In the embodiment, the phase shifter 14 is arranged at the inner end of the radiator 1 close to the radio frequency connector 3. Among them, represents the phase difference of the signal received by adjacent radiators 1 from a certain direction, and the spatial phase difference between adjacent elements is

[0037]

[0038] The radiator 1 adopts a circular patch antenna, which has a compact structure, is easy to manufacture, and has good gain and radiation directivity.

[0039] The edge of the radiator 1 is provided with a first cut seam 11 and a second cut seam 12, which are oppositely arranged, which can help to improve the directivity of the antenna and enhance the signal receiving or transmitting ability in a certain direction; the two slit cuts provide more design freedom, so that the antenna performance can be optimized while meeting different size and structure requirements.

[0040] The radiator 1 is also provided with a feed needle 13, which is arranged between the radio frequency connector 3 and the radiator 1 and communicates the radio frequency connector 3 with the radiator 1; the position of the feed needle 13 is offset outward from the center, which is used to ensure the circular polarization characteristics of the radiator 1.

[0041] The above only describes the preferred embodiments of the present application and does not limit the present application, and any modifications, equivalent replacements and improvements made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A S-band circularly polarized array antenna comprising a radiator and a substrate, characterized in that: It also includes radio frequency connectors and power dividers, the radio frequency connectors are provided with a plurality of and distributed on the substrate, the power divider is used for controlling the signal amplitude of the radio frequency connector; the radiator is provided with a plurality, the number of the radiator is same with the number of the radio frequency connector, the radiator is respectively communicated with the radio frequency connector; the radiators are uniformly distributed in matrix on the substrate.

2. The S-band circularly polarized array antenna of claim 1, wherein: The transverse distance d1 between adjacent radiators is equal.

3. The S-band circularly polarized array antenna of claim 2, wherein: The longitudinal distance d2 between adjacent radiators is equal.

4. The S-band circularly polarized array antenna of claim 3, wherein: The transverse distance d1 is equal to the longitudinal distance d2.

5. The S-band circularly polarized array antenna according to any one of claims 1-4, characterized in that: The radiator is provided with a phase shifter, and the phase shifter is used for controlling the phase of the signal transmitted and received by the radiator.

6. The S-band circularly polarized array antenna according to any one of claims 1-4, wherein: The radiator adopts a circular patch antenna.

7. The S-band circularly polarized array antenna of claim 6, wherein: The edge of the radiator is provided with a first cut seam and a second cut seam, and the first cut seam and the second cut seam are oppositely arranged. 8.The S-band circularly polarized array antenna according to claim 7, wherein: The radiator is also provided with a feed needle, which is arranged between the radio frequency connector and the radiator and communicates the radio frequency connector with the radiator.

9. The S-band circularly polarized array antenna of claim 8, wherein: It also includes an antenna reflector, the radio frequency connector is arranged on the antenna reflector; the substrate is arranged between the antenna reflector and the radiator, and the feed needle passes through the antenna reflector and the substrate.

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