Characterization of microstrip open end in the structure of a parallel-coupled stripline resonator filter

An accurate characterization of the stripline open end in the parallel-coupled microstrip filter configuration is described. The method of analysis is based on a two-port resonance technique where the spectral-domain approach is used as a full-wave analysis. Even- and odd-mode edge effects are characterized separately by solving transcendental equations. Calculated results are used for the design of certain filters. Experimental results show excellent filter performances.<
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