Multifunctional reconfigurable broadband frequency selection wave absorber unit based on liquid metal

Abstract

The invention discloses a multifunctional reconfigurable broadband frequency selection wave absorber unit based on liquid metal, which is characterized in that the multifunctional reconfigurable broadband frequency selection wave absorber unit is arranged under a periodic boundary condition so as to simulate the condition that the unit is infinitely expanded in a horizontal plane; the multifunctional reconfigurable broadband frequency selection wave absorber unit comprises an upper-layer wave absorption loss structure, a fourth dielectric substrate, a first liquid metal flow channel, a fifth dielectric substrate, a sixth dielectric substrate and a second liquid metal flow channel which are sequentially distributed from top to bottom. A first liquid metal flow channel is etched in the fourth dielectric substrate, and a second liquid metal flow channel is etched in the sixth dielectric substrate. The switching between the wave absorbing performance and the transmission performance in different states can be realized by changing the injection and suction states of the liquid metal in the liquid metal runner I and the liquid metal runner II. According to the invention, the reconfigurable characteristic from all-pass to partial wave absorption in three states within the bandwidth range of 2GHz-18GHz can be realized.

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