Dual-polarized transmissive surface with controlled electrical characteristics and its design method with filter circuit terminated

Abstract

The invention discloses a dual-polarized transmissive surface and a design method thereof for controlling electrical characteristics with a filter circuit terminated. The transmissive surface includes: a dual-polarized receiving antenna array, a filter circuit, and a transmitting antenna array. The receiving antenna array is used for For transmitting the received electromagnetic wave signal to the filter circuit, the filter circuit is used to control the amplitude, phase and frequency characteristics of the transmission surface, and the transmitting antenna array is connected to the terminal of the filter circuit. The present invention provides a new idea of ​​using a circuit to control the electrical characteristics of incident electromagnetic waves. Through rational design of the circuit, a single-band or multi-band transmission surface with filtering characteristics can be realized. The present invention can obtain a reflection frequency band and a transmission frequency band. A frequency selective surface that can be used as a dichroic mirror for a Cassegrain antenna subreflector.

Description

technical field [0001] The invention belongs to the field of transmissive frequency selective surfaces, in particular to a dual-polarized transmissive surface and a design method thereof, which are terminated with a filter circuit to control electrical characteristics. Background technique [0002] The frequency selective surface is a one-dimensional or two-dimensional infinite periodic array composed of independent units, which is essentially a spatial filter circuit, which is used to select the frequency of incident electromagnetic wave transmission and reflection to achieve band-pass or band-stop filtering characteristics . Transmissive frequency selective surfaces have important applications in transmission arrays, dichroic mirrors, radomes and radar stealth because they can obtain high transmission efficiency and good phase adjustment ability at the same time. [0003] In order to obtain a good frequency selection capability and a wide range of phase adjustment capabil...

AI Technical Summary

Problems solved by technology

The structure of the transceiver antenna is simple, the phase adjustment ability is strong, but the frequency selection ability is relatively poor. The transmission unit designed with the transceiver antenna has a slow transition sideband in the upper and lower sidebands of the transmission frequency band, and it is impossible to obtain a steep out-of-band suppression effect.

The multi-layer frequency selective surface structure is relatively complex, and it is difficult to realize the transmission surface with two polarizations having different transmission frequency bands

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