Multiband Tunable FSS structure with using feeding network microstrip lines based on Microwave Circuit

Design and analysis of a miniaturized tunable periodic structure using PIN diodes is presented. The behaviour of the structure for two different incidences of electromagnetic waves, namely TE and TM incidences, is reported in the frequency range between 2 and 14 GHz. To achieve a proper way to overcome the problems introduced by the biasing of the lumped elements, biasing microstrip lines have been designed. Special care in the design had to focus on the symmetry breaking introduced by the feeding lines. The proposed tunable metasurface exhibits broadband and multiband frequency response.