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Ka-band wide-angle scanning circularly-polarized microstrip antenna array

A wide-angle scanning, microstrip antenna technology, applied in the field of satellite communication antennas, can solve the problems of reduced main beam gain, small beam scanning range, excessive weight, etc., to achieve large communication capacity, large beam scanning range, and light weight.

Pending Publication Date: 2017-10-27
CHENGDU TOPANTECH CO LTD
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  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

[0005] The currently used digital multi-beam antenna arrays mostly use slot arrays and horn arrays. The disadvantages of this array antenna are not only large size and excessive weight, but also a small beam scanning range, generally around ±20°. Large grating lobes will appear, and the gain of the main beam will also drop significantly

Method used

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  • Ka-band wide-angle scanning circularly-polarized microstrip antenna array
  • Ka-band wide-angle scanning circularly-polarized microstrip antenna array
  • Ka-band wide-angle scanning circularly-polarized microstrip antenna array

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Embodiment Construction

[0056] see Figure 1-8 ,as well as Figures 21 to 25 .

[0057] The Ka-band wide-angle scanning circularly polarized microstrip antenna array is characterized in that it is composed of M×N antenna units, M=1, N=16, and the antenna unit includes an antenna part and a base part, and the antenna part is installed on On the base portion, the antenna portion includes:

[0058] The first antenna substrate 21 is provided with a first balun feeder 24 on its front side, and a first microstrip dipole line 31 is provided on its back side, and the first balun feeder 24 is connected to the first signal connection end 42;

[0059] The second antenna substrate 22 is provided with a second balun feeder 20 on its front, and a second microstrip dipole line 32 on its back, and the second balun feeder 20 is connected to the second signal connection end 41;

[0060] The first antenna substrate 21 and the second antenna substrate 22 are installed on the antenna floor 25, and the first antenna su...

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Abstract

The invention provides a Ka-band wide-angle scanning circularly-polarized microstrip antenna array and relates to the technical field of a satellite communication antenna. The Ka-band wide-angle scanning circularly-polarized microstrip antenna array is formed by M*N antenna units, M and N being an integer, M>=1, N>=2. Each antenna unit comprises an antenna portion and a base portion. The antenna portion is mounted on the base portion; and the antenna portion comprises a first antenna substrate and a second antenna substrate, wherein the first antenna substrate and the second antenna substrate are mounted on an antenna floor, and the first antenna substrate and the second antenna substrate intersect. The antenna floor is provided with a floor grounding wire. The antenna floor is also provided with four metal parasitic rods, which locate at the two ends of the first antenna substrate and the two ends of the second antenna substrate respectively. A first Balun feeder and a second Balun feeder are insulated mutually. The base portion comprises a base, which is internally provided with a feed network circuit. The Ka-band wide-angle scanning circularly-polarized microstrip antenna array is light in weight, large in beam scanning range, wide in frequency bandwidth and large in communication capacity.

Description

technical field [0001] The present invention relates to satellite communication antenna technology. Background technique [0002] Satellite communication refers to the use of artificial earth satellites as relay stations to forward radio waves, thereby realizing communication between two or more earth stations. [0003] Spaceborne antenna is an important part of the communication satellite payload, and has an extremely important impact on the performance of the entire satellite communication system. Among them, the wide beam (2θ 0.5 >90°) wide-angle circularly polarized antenna has excellent characteristics such as no need for polarization tracking, accepting incoming waves of any polarization, and small polarization mismatch loss in the wide-angle range. It is used in mobile satellite systems, airborne radars There is a huge application potential in the field of system and so on. [0004] At the same time, during the homing process of space-borne antennas and cutting-...

Claims

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Application Information

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IPC IPC(8): H01Q1/38H01Q1/48H01Q1/50H01Q21/00H01Q21/24H01Q21/29H01Q1/28
CPCH01Q1/288H01Q1/38H01Q1/48H01Q1/50H01Q21/0006H01Q21/24H01Q21/293
Inventor 蒋立平袁赤诚邹景孝
Owner CHENGDU TOPANTECH CO LTD
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