Reconfigurable Cross Dipole - Hash Frequency Selective Surface

The authors present an RFSS structure with two states based on the cross dipole element. The structure is designed to behave as an array of cross dipole elements in one state, and as an array of hash elements in the other state. The cross dipole patch array has a stop-band filter response, and the hash array behaves as a pass band filter at the design frequency of 12.5 GHz. The frequency response of these filters is analysed using the equivalent circuit method. CST software simulations and experimental results are used to validate the RFSS design.