Abstract: In this paper, using detector diode, design a hybrid integrated microstrip detector whose center frequency is 94 GHzwith 4 GHz bandwidth are presented. The input port of the detector is the form of WR10 standard rectangular waveguide and outputport of which is an SMA junction. The waveguide to microstrip transition is realized by tapering antipodal fin-line. The polarity ofoutput signal is negative. The voltage sensitivity is above 320mV/mW in the center frequency when the input power is -20dBm.