Millimeter wave circularly polarized planar slot array antenna

Abstract

The invention discloses a millimeter wave circularly polarized planar slot array antenna. The antenna comprises an antenna radiation layer, an antenna coupling layer, an antenna feed layer and an antenna receiving layer which are superposed together from top to bottom. The antenna radiation layer comprises multiple antenna units, each antenna unit is composed of a horn unit, a radiation slot and a radiation matching block, and one horn unit forms one horn subarray; the antenna feed layer comprises a feed slot, a feed waveguide and a feed matching block, and the feed slot, the feed waveguide and the feed matching block form a feed network together; and the antenna units of the antenna radiation layer have no polarization cover, and the horn subarrays are used for realizing the circularly polarized radiation. The millimeter wave circularly polarized planar slot array antenna has no polarization cover, and has the circularly polarized property, high gain property and perfect difference beam coverage performance; the coverage rate of the difference beam pairs and the beams is up to 100%; and compared with the prior art, the millimeter wave circularly polarized planar slot array antenna has the advantages that the difficulty in the electric fitting technology is reduced, the consistency of production is improved greatly, the workload of debugging in the later stage is avoided, the environmental suitability of the antenna is enhanced, and the production cost is lowered.

Description

technical field [0001] The invention relates to the field of flat-panel slot antennas, in particular to a millimeter-wave circularly polarized flat-panel slot array antenna. Background technique [0002] With the complexity of the modern battlefield situation, the battlefield environment is worse than before. In this form, the communication system is required to be able to work around the clock in various complex environments and battlefield situations such as sand, dust, and fog. This requires that the antenna in the RF front-end should not only work in the millimeter-wave frequency band, but also have circular polarization, high gain characteristics, and perfect sum-difference beam coverage. It can be seen that the millimeter-wave circularly polarized antenna has a wide range of application values. Broad prospects. [0003] Microstrip antennas have developed rapidly in recent years, with various forms, and have their unique advantages in the method of realizing circular p...

AI Technical Summary

Problems solved by technology

[0004] In order to simplify the design of the feeding network, conventional millimeter-wave waveguide wide-side slot array antennas are usually used in combination with series feed and parallel feed. Due to the existence of series feed factors, the processing accuracy is directly increased, and the indicators in the frequency band are easy to deteriorate.

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