Adjustable narrowband wave-absorbing device based on plasma meta-material

Abstract

The invention discloses an adjustable narrowband wave-absorbing device based on a plasma meta-material. The adjustable narrowband wave-absorbing device comprises a bottom metal reflecting plate, a dielectric substrate and solid-state plasma resonator units, the dielectric substrate and the solid-state plasma resonator units are arranged on the metal reflecting plate, solid-state plasma is implemented by an array composed of PIN units, the PIN units are isolated from one another through isolation layers, and the PIN unit array is controlled and excited through a programmable logic array loadedon two ends of the PIN unit array to obtain the solid-state plasma. Each solid-state plasma resonator unit has two kinds of working states including the excited state and the unexcited state. the wave-absorbing device has a good absorption effect on TE polarized waves, the excitation region of each resonator unit formed by the solid-state plasma is controlled in a programming mode, excitation of different resonator units can be achieved, and therefore the aim of maintaining the high absorption rate of the wave-absorbing device in a high frequency band and dynamically controlling progressive optimization of the absorption rate in a low frequency band is achieved, and the working frequency of the wave-absorbing device can efficiently cover the whole X wave band when the excitation region isselected appropriately.

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 absorpt

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