A Highly Integrated Quasi-millimeter Wave Transmitter MMIC Using 3D-MMIC Technology

A highly integrated quasi-millimeter-wave transmitter MMIC that integrates 26 circuits in a 3 mm times 3 mm area using three-dimensional MMIC (3D-MMIC) technology is presented. The power dissipation of the MMIC is only 0.54 W. It achieved a high P
<sub>1

dB</sub>
of 6 dBm and gain of 19 dB at 26 GHz. Furthermore, it integrated step attenuators with a new built-in inverter using an N-channel depression FET for transmit power control.