Reconfigurable low-RCS circularly polarized antenna array

Abstract

The invention discloses a reconfigurable low-RCS circularly polarized antenna array, which comprises a metal resonant structure, a dielectric substrate, a metal copper-clad floor, a feed network dielectric substrate, a microstrip feed network, a diode bias network dielectric substrate and a diode bias network which are arranged in sequence, the microstrip feed network penetrates through the feed network dielectric substrate, the metal copper-clad floor and the dielectric substrate through a metal probe to be connected with the metal resonant structure, so that circular polarization radiation of the antenna array is realized; the diode bias network is connected with the microstrip feed network through a metalized through hole penetrating through the diode bias network dielectric substrate; a PIN type diode is loaded at the tail end of a microstrip feeder network to serve as an electronic switch, and when the diode is in a conducting state, an antenna array is in a radiation state; when the diode is in a cut-off state, the antenna array is in a scattering state. The antenna has the advantages of being low in profile, high in aperture utilization rate and reconfigurable, and the RCS of the antenna is reduced from the angle of time domain stealth.

Description

technical field [0001] The invention belongs to the field of communication technology, and further relates to a reconfigurable low-RCS circularly polarized antenna array in the field of antenna technology. Background technique [0002] Radar is one of the most common means of detection. During the detection process, the electromagnetic waves emitted by the radar will be reflected if they encounter obstacles. Radar detects the outside world by receiving and processing information in reflected electromagnetic waves. The Radar Cross Section (RCS) characterizes the ability of the target to generate echoes under the irradiation of electromagnetic waves emitted by the radar, and is an important indicator to measure the stealth characteristics. [0003] In the stealth design platform, taking the aircraft as an example, the air intake, cockpit and antenna are the three sources of scattering that contribute the most to the RCS of the entire system. The antenna needs to ensure its ...

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Problems solved by technology

[0005] In order to solve the above-mentioned defects existing in the prior art, the object of the present invention is to provide a reconfigurable low RCS circularly polarized antenna array, which is used to solve the problem of low aperture efficiency and large section of the existing low RCS antenna loaded with electromagnetic metasurfaces. The problem is to achieve low profile, high aperture utilization, reconfigurable antenna, and realize the reduction of antenna RCS from the perspective of time domain stealth

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