The HMC129 chip is a miniature doublebalanced mixer which can be used as an upconverter or downconverter in the 4 to 8 GHz band. The chip can be integrated directly into hybrid MICs without DC bias or external baluns to provide an extremely compact mixer. It is ideally suited for telecom and EW / ECM applications where small size, no DC Bias, and consistent IC performance is required. It performs equally well as a Bi-Phase modulator or demodulator . See the HMC136 data sheet in section 5.