Adjustable absorption and transmission integrated conformal frequency selective surface

Abstract

The invention discloses an adjustable absorption and transmission integrated conformal frequency selective surface, which comprises a dielectric substrate, wherein a plurality of frequency selective surface units are periodically arranged on the surface of the dielectric substrate, and each frequency selective surface unit comprises a selective wave absorbing layer and a selective wave transmission layer which are arranged on the surfaces of the two sides of the dielectric substrate respectively, and adjustable PIN diodes are arranged in the selective wave absorbing layer and the selective wave transmission layer; a direct current bias circuit is arranged on the dielectric substrate and is used for regulating and controlling the adjustable PIN diodes; and the frequency selective surface unit and the dielectric substrate are conformal. The frequency selective surface has the advantages of adjustability, conformality, stable angle and polarization, compact design, broadband absorption, broadband wave transmission and the like. The on / off state of the PIN diode can be adjusted through the designed biasing circuit, so that the structure can be switched between the performance of medium-frequency wave transmission and low-frequency / high-frequency wave absorption and the performance of all absorption of interested frequency bands; the frequency selective surface has good angle stability and polarization stability, and can be conformal on various conformal structures such as a cylindrical surface and the like.

Description

technical field [0001] The present invention relates to the field of antenna microwave technology, in particular to an adjustable absorbing and penetrating integrated conformal frequency selective surface, which can realize intermediate frequency wave transmission and low frequency / high frequency wave absorption, or realize all absorption of interest frequency bands . Background technique [0002] As a one-dimensional or two-dimensional periodic structure composed of metal patch units or aperture units periodically arranged on a dielectric substrate, a frequency selective surface (FSS) can transmit or strongly reflect incident electromagnetic waves at the resonance point. Frequency selective characteristics, the characteristics of which affect the performance of radar communications. [0003] Prior art, Chinese invention patent "Absorbing and penetrating integrated frequency selective surface with high-frequency broadband absorbing and low-frequency wave-transmitting" (publ...

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Problems solved by technology

[0004] However, with the development of communication technology, the frequency selective surface puts forward the requirements of active tunability and conformability, etc., and the existing technology can not meet the requirements.

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