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A novel miniaturized frequency selective rasorber (FSR) with tunable passband is proposed. The unit cell dimension of designed structure is miniaturized to λ0/30. Miniaturization of the FSR unit cell is achieved by using convoluted elements, introducing varactors, and adopting nonresonant elements. The property of tunable passband is obtained from the variable capacitance of loaded varactors. The...
A novel design of absorptive frequency selective surface (AFSS) with tunable absorptive/switchable transmissive property is presented. The AFSS is comprised of a resistive surface and a metallic bandpass FSS on which PIN diodes are mounted. By changing the working state of the PIN diode, a tunable absorption performance at 3.5–11.2 GHz is achieved with a switchable transmission at the frequency of...
This paper analyzes the influence of geometric dimensions of absorptive/transmissive radome to its performance based on equivalent circuit theory. When the impedance of free space matches the impedance of absorber, no wave would be reflected and most energy would be absorbed. The absorptive/transmissiveradome is consisted by aperture frequency selective surface(FSS), substrate and absorptive FSS....
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