Wave absorbing and transmitting integrated wave absorber

Abstract

The invention discloses a wave absorbing and transmitting integrated wave absorber which comprises M * N active frequency selection surface units arranged periodically, M is larger than or equal to 2, and N is larger than or equal to 2. The active frequency selective surface unit comprises an upper wave absorbing layer and a lower wave transmitting layer; the wave absorbing layer comprises a first dielectric layer and a first metal layer located on the upper surface of the first dielectric layer; the wave-transparent layer comprises a second dielectric layer and a second metal layer located on the upper surface of the second dielectric layer; an air layer is arranged between the first dielectric layer and the second dielectric layer; the wave absorbing layer is used for absorbing low-frequency electromagnetic waves; the wave-transparent layer is used for transmitting high-frequency-band electromagnetic waves; and the air layer is used for connecting the wave-absorbing layer and the wave-transparent layer and simultaneously plays a role in increasing bandwidth and matching impedance. According to the invention, a geometric symmetry structure design is adopted, a stable dual-polarization characteristic can be provided, and the antenna has the advantages of wide broadband, low profile and the like, is simple in manufacturing process, and has an important application prospect in the aspect of stealth equipment.

Description

technical field [0001] The invention belongs to the technical field of radar stealth, and in particular relates to a wave-absorbing and wave-transmitting integrated wave absorber. Background technique [0002] In modern electronic warfare, stealth technology, especially intelligent stealth system, is more and more important to the rapid development of detection technology. Radar stealth technology is mainly achieved by reducing the RCS of the target. With the development of technology, people's demand for integrated radomes and radomes with wave absorption and transmission is getting higher and higher. This means that it is very important to design a radome with in-band absorption and out-of-band transmission. Therefore, an ideal radome should transmit the operating signal and absorb out-of-band input power. [0003] Frequency selective surface (FSS) has selective permeability to electromagnetic waves, which makes it widely used in the modification of radomes, space elect...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide an integrated wave absorber for absorbing and transmitting waves, which can effectively solve the problems of single structure and polarization sensitivity in the existing structure.

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