Analysis and application of photonic band-gap (PBG) structures for microwave circuits

The analysis and application of photonic band-gap (PBG) structures for micr ostrip circuits are presented. Microstrip PEG structures can be realized by either drilling holes in the dielectric substrates or etching periodic sha pes in the ground planes. A simple analysis method, based on an equivalent microstrip line model, is proposed and verified by means of comparison with measured data. The equivalent microstrip line model can be used with comme rcial software to efficiently analyze the effect of a defect in the microst rip PEG structure, Optimization of the defect geometry allows realizing a p lanar resonator.