Dual-frequency dual-circularly-polarized high-efficiency common-caliber planar antenna

Abstract

The invention discloses a dual-frequency dual-circularly-polarized efficient common-aperture planar antenna which comprises a radiation aperture layer, a resonant waveguide layer and a power division feed network layer. The radiation aperture layer comprises square high-frequency circularly-polarized radiation units and low-frequency circularly-polarized radiation units which are uniformly arranged in a staggered manner; the resonant waveguide layer comprises high-frequency feed waveguide cavities and low-frequency resonant waveguide cavities, the high-frequency feed waveguide cavities are horizontally distributed at equal intervals, and the low-frequency resonant waveguide cavities are vertically inserted between the walls of the adjacent high-frequency feed waveguide cavities; the power division feed network layer comprises high-frequency feed networks and low-frequency feed networks, the high-frequency feed networks are a one-to-six waveguide power divider and a one-to-four waveguide power divider respectively, the high-frequency feed networks are arranged on the vertical plane where the central axis of the array antenna is located, and the low-frequency feed networks are arranged on the two sides of the array antenna. The dual-frequency dual-circularly-polarized high-efficiency common-caliber antenna has the characteristics of compact structure, low profile, small size, light weight and large power capacity, and realizes dual-frequency dual-circularly-polarized high-efficiency common caliber.

Description

technical field [0001] The invention relates to the technical field of common-aperture antennas, in particular to a dual-frequency dual-circular polarization high-efficiency common-aperture panel antenna. Background technique [0002] In order to reduce the size of the phased array antenna system, increase the aperture utilization efficiency, increase the integration level, and reduce the weight cost, it is urgently hoped that the multi-band, multi-polarization, and multi-working mode antennas should be integrated as much as possible without affecting the system performance. Designed on the same aperture surface to meet the requirements of the front-end antenna of the multifunctional phased array system in the fields of modern satellite communication, space measurement and control, and radar detection, the common aperture antenna technology came into being. At present, the common-aperture phased array antennas at home and abroad mostly adopt single-layer or stacked arrangeme...

AI Technical Summary

Problems solved by technology

The working frequency band of the antenna covers 8.1GHz~8.29GHz and 8.39GHz~8.71GHz. It has the characteristics of high gain, low profile, low processing cost, and easy integration. However, the integration of the feed network and the radiation array on the same plane increases the antenna aperture and reduces the Aperture efficiency, considering the high dielectric loss and ohmic loss of the SIW power splitter, further reduces the overall efficiency of the antenna, and due to the selection of side-by-side feeding system, the operating frequency ratio of the antenna is limited

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