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The analysis and application of photonic band-gap (PBG) structures for microstrip circuits are presented. Microstrip PBG structures can be realized by either drilling holes in the dielectric substrates or etching periodic shapes 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 commercial software to efficiently analyze the effect of a defect in the microstrip PBG structure. Optimization of the defect geometry allows realizing a planar resonator.
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Yang et al. (1999) studied this question.
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