A Split Ring Circularly Polarized Cavity Backed Antenna Array
An antenna array, circular polarization technology, applied in the fields of communication, measurement and control, can solve the problems of cumbersome structure, unfavorable antenna, network integration design, low profile design, etc. Effect
Active Publication Date: 2017-09-29
NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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[0004] 2. Circularly polarized microstrip antenna form with external circularly polarized bridge. The axial ratio and standing wave bandwidth of this form of microstrip antenna are generally wider than 3dB. The axial ratio bandwidth is greater than 15%, and the standing wave bandwidth of less than 2 is greater than 20. %, but the external circular polarization bridge takes up a lot of space, the feeder is long, and the difference loss is large, which is not conducive to the integrated design of antenna and network
[0005] 3. The waveguide structure circularly polarized antenna has high radiation efficiency and a bandwidth greater than 20% with an axial ratio of less than 3dB, but the feed network takes up a lot of space and has a bulky structure, which is not conducive to the low profile design of the antenna
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[0017] refer to figure 1 , figure 2 and image 3 , a split ring circularly polarized cavity-backed antenna array, including a plurality of antenna sub-arrays, each antenna unit sub-array is composed of two antenna units, the antenna unit includes a radiation layer 1, a feed network layer 2 and a back The cavity layer 3 is characterized in that: the feed network layer 2 includes an inner open ring 5, an outer open ring 6 and a feeder line arranged on the printed board, and one end of the outer open ring 6 is connected to the feeder line, The other end of the outer opening ring 6 is a free end, the inner opening ring 5 is arranged on the inside of the outer opening ring 6 and is concentric with the outer opening ring 6, and the opening direction of the inner opening ring 5 is the outer opening connected with the feeder. The direction at which one end of the split ring 6 is rotated counterclockwise by 90°.
[0018] Wherein, the antenna sub-array is composed of a first antenna...
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The invention discloses a split-ring circularly polarized array antenna, which relates to a circularly polarized microstrip antenna device in the fields of communication and measurement and control. It consists of a radiation layer, a feed network layer, and a back cavity layer. It designs a circularly polarized antenna structure with a wide standing wave bandwidth and a wide axial ratio bandwidth according to the requirements of communication, measurement and control for polarization purity and installation space. The invention also has the characteristics of low profile, small size, and easy conformality. It is especially suitable for the manufacture of high-performance low-profile circularly polarized antennas for aircraft carriers in communication and measurement and control systems.
Description
technical field [0001] The invention relates to a split-ring circularly polarized cavity-backed antenna array in the fields of communication and measurement and control. The invention is more suitable for application in communication and measurement and control systems requiring circularly polarized radiation antennas. Background technique [0002] At present, there are mainly the following structural forms that can form circularly polarized antennas in communication and measurement and control systems. Although they have their own characteristics in terms of performance, they all have certain deficiencies. [0003] 1. Cutting angle circularly polarized microstrip antenna: This type of antenna has a simple structure and a low profile, but the axial ratio and standing wave bandwidth of the antenna are less than 2%. [0004] 2. Circularly polarized microstrip antenna form with external circularly polarized bridge. The axial ratio and standing wave bandwidth of this form of mic...
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IPC IPC(8): H01Q1/38H01Q1/36H01Q21/24
Inventor 宋长宏路志勇邓智勇李振生周建寨赵航
Owner NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP