基于X波段源,通过9×2×2次倍频链实现了输出约1-2m W的320-356GHz全固态倍频源。该信号源作为本振信号驱动664GHz接收前端的二次谐波混频器,该混频器采用了有源偏置技术以降低混频器的本振驱动功率和接收机的噪声温度。仿真结果表明,混频二极管在0.3m W本振驱动功率及0.35V直流偏置下,在650-680GHz带宽内,仿真得到的单边带变频损耗小于12d B,666GHz最小损耗为10.8d B。 Based on the X-band source, a 320-356GHz all-solid-state frequency doubling source outputting about 1-2 mW is realized by a 9 × 2 × 2 times-multiplying chain. The signal source drives the second harmonic mixer at the front end of the 664GHz receive as a local oscillator signal. This mixer uses an active bias technique to reduce the mixer’s LO drive power and receiver noise temperature. The simulation results show that in the frequency range of 650-680GHz, the frequency conversion loss of the single sideband is less than 12d B and the minimum loss of 66.8GHz is 10.8d B at the frequency of 0.3m W LO and 0.35V DC bias.