【摘要】 采用鳍线结构研制出三毫米波亚谐波混频器。混频的核心元件是反向并联的GaAs梁式引线肖特基势垒二极管对。根据亚谐波混频器对本振、射频和中频网络的要求,先用谐波平衡法分析出反向并联二极管对在本振信号单独激励下的大信号阻抗,由此设计出本振网络。然后模拟出该器件在大信号本振激励下的小信号射频输入阻抗,并由此设计出射频网络。中频网络采用微带线结构实现。该混频器工作在射频92~96GHz,中频8~12GHz,实测带内变频损耗小于19.1dB。更多还原

【Abstract】 A 3mm subharmonic mixer using finline is presented.The key device of the mixer is a pair of GaAs beam lead antiparallel Schottky diodes.According to the request of the local oscillator(LO),radio frequency(RF) and intermediate frequency(IF) networks of subharmonic mixer,the large signal impedance of antiparallel diode pair,which is stimulated with the LO signal excited alone,is simulated by harmonic balance method firstly.The LO network is designed based on the results.Then the small signal impedance of antiparallel diode pair with LO stimulation is simulated and the RF network is designed.The IF network is realized with microstrip.The mixer is designed to operate at RF frequencies of 92~96GHz and IF frequencies of 8~12GHz.The measured frequency conversion loss is better than 19.1dB.更多还原