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Spectral analysis of defective photonic band-gap (PBG) structures on coplanar waveguide (CPW)

This paper presents some interesting results in the analysis of some defective photonic band-gap (PBG) structures on a coplanar waveguide. PBG structures have been broadly applied in recent years in communications and microelectronics areas. They are formed by periodic circuit elements and act as a band-stop device in which unwanted signals at certain frequency range are filtered. Frequency characteristics are usually determined either numerically or experimentally. Nevertheless, with a slight distortion of a PBG pattern, interesting pattern characterizing the perturbed source is imposed on the original characteristics of the PBG, which leads to broad studies in scattering and inverse scattering areas. Keywordsdefective PBG, CPW.