Abstract: In this paper, a design method of hybrid integrated detector from 210 to 230 GHz is introduced with InP Schottky barrier diode and hybrid integrated circuit process. The input port of the detector is WR4.3 standard rectangular waveguide and the output is an SMA connector. The signal was coupled into the circuit through a waveguide to micro-strip transition. The detector’s negative polarity dc output was picked off the input micro-strip through a low pass filter. The voltage responsivity is above 1200mV/mW at the center frequency with -24dBm input power.