A 330 Ghz Active Frequency Quadrupler In Inp Dhbt Transferred-Substrate Technology

This paper presents a wideband 330 GHz frequency quadrupler using 0.8 mu m transferred substrate (TS) InP-HBT technology. The process includes a heat-spreading diamond layer, which improves the power handling capability of the circuit. The quadrupler delivers -7 dBm output power at 325 GHz, at a DC consumption of only 40 mW, which corresponds to 0.5 % of efficiency. It achieves 90 GHz bandwidth and exhibits very low unwanted harmonics. The circuit utilizes a balanced architecture. The results demonstrate the potential of the InP TS.