Implementation of the SIW Klopfenstein taper using a comb-SIW

摘要

The comb-substrate integrated waveguide (comb-SIW) and the SIW Klopfenstein taper are investigated and presented in this paper. By introducing comb-SIW, the characteristic impedance (ZC) of a SIW can be modified without changing the cut-off frequency (fc) and the width or height of the SIW. The ZC of a SIW can be increased by up to about 1.8 times using comb-SIW. Comb-SIW is used to implement the SIW Klopfenstein taper as an application of comb-SIW. The simulation and measurement results are presented to verify the analysis. The measured return loss of the SIW Klopfenstein taper is over 17.2 dB from 13 GHz to the TE20 mode fc.