Dual-frequency dual-circularly-polarized common-caliber antenna for satellite communication

Abstract

The invention discloses a dual-frequency dual-circularly-polarized common-aperture antenna for satellite communication. The dual-frequency dual-circularly-polarized common-aperture antenna comprises a first dielectric substrate, a second dielectric substrate and a third dielectric substrate which are sequentially stacked from bottom to top; the bottom surface of the first dielectric substrate is provided with a feed network structure, and the top surface is provided with a metal ground; a low-frequency radiation unit is arranged on the top surface of the second dielectric substrate; a high-frequency radiation unit is arranged on the top surface of the third dielectric substrate; the feed network structure comprises a low-frequency port feed network structure and a high-frequency port feed network structure, and band-pass filtering structures are arranged in the feed network structures respectively; and the high-frequency and low-frequency port feed network structures are connected with the high-frequency and low-frequency radiation units through the slot coupling structures respectively. According to the invention, the high port isolation is realized by introducing the band-pass filtering structure, the feed network structure is connected with the radiation unit through the slot coupling structure, and impedance and axial ratio bandwidth are improved by introducing the slot coupling structure; the high-frequency and low-frequency radiation units are designed in a layered manner, so that the overall size of the antenna is reduced; the overall design is simple and the weight is light.

Description

technical field [0001] The invention belongs to the technical field of wireless communication antennas, in particular to a dual-frequency dual-circular polarization common-aperture antenna for satellite communication. Background technique [0002] The antenna is the core equipment in a communication system. As a device for receiving and transmitting electromagnetic waves, it plays an increasingly important role in modern radio communication systems; however, the use of the electromagnetic spectrum is gradually becoming saturated. In the small size and complex electromagnetic environment, designing an antenna with high gain and multi-band coverage has become an important problem to be solved; at the same time, with the increasing integration of electronic equipment, the miniaturization and broadband of antennas are also research hotspots today. . [0003] In radio communication systems, circularly polarized antennas can not only receive circularly polarized waves correspondi...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the technical problems existing in the prior art, the present invention provides a dual-frequency dual-circular-polarization common-aperture antenna for satellite communication to solve the problems of existing circular-polarization antennas, which have relatively large size space and poor port isolation. low technical issues

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