I want to make a TRL calibration setup for measuring my two port device which operate from 26-30 GHz frequency range. 2.92 mm End-launch connector has used in the device to facilitate measurement. For my device I have used CPW to SIW transition at both ports. End launch connector need conductor backed CPW line at the transition end. I am observing in simulation that for end-launch connector attached through line has very high insertion loss for through line (S21 is between -3 to -4 dB). So my question is what kind of transition I should used while making TRL. Can any one share me any documents or you tube video link to make the TRL for mm wave measurement.
Thanking you
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