Tunable narrowband absorber based on plasmonic metamaterials

Abstract

The invention discloses an adjustable narrow-band wave absorber based on plasma metamaterials, which includes a bottom metal reflector plate, a dielectric substrate above the metal plate and a solid-state plasma resonance unit. The solid-state plasma is realized by an array composed of PIN units. There is an isolation layer between the PIN units for isolation, and the programmable logic array loaded at both ends is used to control and excite the PIN unit array, so as to obtain solid-state plasma. The solid-state plasma resonance unit has two working states, the excited state and the unexcited state. The absorber has a good absorption effect on TE polarized waves, and the excitation area of ​​the resonant unit composed of solid-state plasma is controlled by programming. The purpose of maintaining the high absorption rate and the dynamic regulation of the gradual optimization of the low-frequency absorption rate, and the operating frequency of the absorber can cover the entire X-band more efficiently when the excitation area is selected properly.

Description

technical field [0001] The invention relates to a controllable narrow-band wave absorber based on plasma metamaterials, which belongs to the fields of radio communication and microwave devices. Background technique [0002] With the development of information technology, microwave devices have been widely used in various systems in communication. Such as the antenna at the transmitting end, the electromagnetic shielding box, etc. Preventing electromagnetic interference and electromagnetic stealth have broad application prospects in military and civilian fields. Electromagnetic absorber is a kind of microwave device designed to meet this requirement, and it has been more and more widely used in the field of communication. Moreover, with the rapid development of military technology and wireless communication systems, the initial single-frequency absorber can no longer meet the application requirements in complex electromagnetic environments. Multi-frequency, narrow-band elec...

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Problems solved by technology

However, it is difficult to obtain a tunable absorption spectrum with a certain absorption bandwidth for the metamaterial absorber in the traditional sense. To obtain such an absorption spectrum, a large number of lumped components have to be introduced, and the control circuit is complicated and not conducive to integration. Integrated manufacturing with chips

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