Up-conversion module is the core of transmitter,which plays a critical role in millimeter wave communication,radar,guidance and electronic warfare.This paper introduces the design and measurement of a W-band up-conversion module.W-band LO signal is obtained by frequency multiplying,and a 2.5~15.5 GHz IF signal is up-converted to W-band.Then,the W-band signal is filtered and outputted by a fin-line structure W-band band-pass filters,in order to restrict the LO signal,which pass band are 88.5~101 GHz.Finally,...