Dual-circular-polarization phased-array antenna array

Abstract

The invention discloses a dual-circular-polarization phased-array antenna array, belonging to the technical field of antennas. The phased-array antenna array comprises a plurality of phased-array antenna array elements. Each phased-array antenna array element comprises a radiation unit with a microstrip patch, a dual-circular-polarization feed network, a capacitive loading unit and an AMC reflection floor, wherein the radiation unit comprises an upper dipole and a lower dipole, the two dipoles are distributed in a crisscross manner, the radiation arms of the dipoles are ellipses with gradual change structures, capacitive loading units are arranged at the tail ends of the radiation arms of the dipoles, the radiation unit is arranged right above the AMC reflection floor, the dual-circular-polarization feed network is a four-feed-point network, provides 90-degree or 270-degree phase difference feed for two adjacent radiation arms, and can realize left-hand circular polarization and right-hand circular polarization, the dual-circular polarization feed network comprises a bridge combination unit, and the bridge combination unit adopts a GaAs technology. According to the invention, the ultra-wideband low-profile dual-circular-polarization phased-array antenna array is realized.

Description

technical field [0001] The invention relates to a dual circular polarization phased array antenna array, which belongs to the field of antenna technology. Background technique [0002] The reflection and refraction of the electromagnetic wave during propagation will cause the polarization direction to deflect, which will cause the polarization direction of the electromagnetic wave at the receiving end to be different from the polarization direction of the antenna (polarization mismatch). However, circularly polarized waves can use any line The polarized antenna receives, and the circularly polarized antenna can also receive incoming waves in any polarization direction. The attenuation of circularly polarized waves in rainy and snowy weather is small, and the ability to penetrate the ionosphere is strong. It is not affected by the Faraday effect produced by the magnetic field at the two poles of the earth. Electronic countermeasures, synthetic aperture imaging radar and othe...

AI Technical Summary

Problems solved by technology

Compared with the resonant antenna, this size is small in the low frequency band, and the design is relatively difficult, so it is relatively difficult to design a phased array antenna with a large bandwidth (the relative size of the low frequency is too small, and the relative size of the high frequency is too large)

The emergence of tightly coupled array antennas has changed this situation. However, there are relatively few practical engineering applications of tightly coupled arrays, which cannot meet the needs of current engineering design.

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