Switchable Rasorber/Absorber Based on PIN Diodes

To improve its stealth performance within the passband, a reconfigurable rasorber/absorber with resorbing and absorbing states is presented. By introducing PIN diodes, proposed devices achieve a switchable function. At the lossless layer, a square-slot patch is designed to match the transmission window of the resistive layer to achieve a lower insertion loss. Equivalent circuit model of switchable rabsorber/absorber is constructed to provide physical insight into operation. Finally, the simulated results of switchable rasorber/absorber show that the intermediate transmission band can be switched between ON and OFF states.