Abstract
Five novel slotted ground microstrip structures have been studied to prove that the gap and the cross junction capacitances and the associated inductance have significant influence on the attenuation poles and passband characteristics. A quasi-static analytical approach based on the concentration of the surface current on the slotted ground plane structure is adopted. Theory is validated against simulation results by commercial Electromagnetic (EM) solver CST Microwave Design Studio™ and measurement by an Agilent performance network analyzer (PNA) E8361A. Robust agreements between theoretical, simulation, and calculated results support the hypothesis. It has been proved that though both the gap and junction capacitances play significant role in determining the attenuation pole, the gap capacitance favorably reduce the location of the attenuation pole with moderately high selectivity of the stopband. © 2008 Wiley Periodicals, Inc. Int J RF and Microwave CAE, 2008.
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