Abstract: The design of passive components in quadruple subharmonic image rejection mixer is proposed in this paper.The passive components include double-balun and lange coupler. With the help of ADS, getting the final simulation results thatthe balun realized magnitude imbalance degree in the range of 7.9 ~ 9.5GHz is less than 0.2dB,the phase imbalance degree isless than 1 °, and the Insertion loss is about 7.3 dB at the center frequency of 8.7GHz; lange coupler realized magnitudeimbalance degree in the range of 30 ~ 40GHz is less than 0.3 dB,the phase imbalance degree is less than 1 °, and the Insertion loss is about 3.25 dB at the center frequency of 35GHz . The satisfactory result, which has been reached in this simulation ofbalun and lange coupler, does make a significant foundation to the realization of the monolithic quadruple subharmonic imagerejection mixer. .