Dual-circularly polarized antenna unit and array antenna

Abstract

The invention discloses a dual-circularly polarized antenna unit and array antenna, and relates to the sensing field of electronic information. The array antenna comprises m*n dual-circularly polarized antenna units and a feed network; the dual-circularly polarized antenna unit comprises a radiation chamber, the first to the second circularly polarized waveguide radiators, the first to the second waveguide chambers, the first to the second feed ports and a metal wall. Different metal partitions are used for shifting phases, thereby covering a high frequency band and a low frequency band; the array antenna can be used for the radar, communication, navigation and like antennas which are high in gain, common in transmitting / receiving and strong in directionality, and is an efficient transmitting / receiving dual-circularly polarized array antenna, and is the circularly polarized phased-array antenna capable of being used for electronic beam scanning after extension.

Description

technical field [0001] The field related to the design of the present invention is electronic information sensing system, which can be used in radar, communication, navigation and other antennas with high gain and strong directivity. It is a high-efficiency transceiver dual circularly polarized array antenna. Circularly polarized phased array antennas available for electronic beam scanning. Background technique [0002] In electronic information systems, there are many forms of traditional circularly polarized arrays or phased array antennas, but each antenna form has its own characteristics, advantages and disadvantages, specifically as follows: [0003] 1. Microstrip circularly polarized antenna. The microstrip circularly polarized antenna is a resonant antenna, and the circular polarization is realized by means of perturbation, bridge and multi-port feed cooperation. Among them, the perturbation method is easy to realize, and only needs to be integrated when making the ...

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Problems solved by technology

Among them, the perturbation method is easy to realize, and only needs to be integrated when making the printed board, without additional power distribution components, but its standing wave ratio and axial ratio are narrow, and the radiation loss is large, which is not conducive to the realization of dual circular polarization and High-efficiency radiation; the implementation of circular polarization combined with bridge and multi-port feed can achieve a large radiation bandwidth and good axial ratio characteristics, but due to the introduction of additional components, its production is relatively complicated, and additional insertion is also introduced loss

[0004]2. Single-port radiating waveguide circularly polarized antenna, this antenna is very suitable for the generation of circularly polarized signals, and the axis is relatively small within a certain angle range, The implementation method is simple and easy to process, but the port radiation mode is not conducive to realizing broadband characteristics and transceiver isolation. If it is to be realized, it is often implemented by separating the transmitting and receiving antennas or backfeeding, which is very complicated.

The implementation technology of circularly polarized signals in this way is relatively simple, but this way introduces the insertion loss of the polarization grid, and because the polarization grid is in a resonant form, it is not conducive to the realization of broadband axial ratio

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