Designs of Substrate Integrated Waveguide(SIW) and Its Microstrip Transition

This paper designs the substrate integrated waveguide(SIW) operating in Ka-band,expatiates the principle and structure of SIW and its microstrip transition,and deduces the calculation method of each parameter in the transition structure by means of formulas,performs the simulation through HFSS software,makes a transition sample from SIW to the microstrip and performs test,and the results show that the insertion loss of the waveguide is from-1dB to-2 dB and the return loss is less than-10 dB from 35.5 GHz to 37.5 GHz.