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A Novel HPF of Substrate Integrated Waveguide


N.Molanian, G.R.Solat, P.Parvand


Vol. 8  No. 10  pp. 230-235


Utilizing filters to suppress spurious signals is inevitable in communication systems. In some applications, where the level of spurious signals is high or the frequency of LO is near to IF (in up-conversion), increasing the slope of the filter to eliminate spurious signals is unavoidable. In this paper we are going to present an idea about usage of evanescent mode of Substrate Integrated Waveguide (SIW) as a High Pass Filter (HPF), to excellently reject spurious signals and a novel method for matching between the filter and a microstrip line for this filter is presented. The mathematical calculations based on the presented method and the structure, and also the similarities between the calculations and the simulations done by HFSS confirm the efficiency of this new method. The validation of method is shown by measurement results.


Evanescent Mode, SIW HPF, Matching, Microstrip Line