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美国Varian公司开发成功单级5～100GHz单片毫米波集成电路(Monolithic Millimeter-Wave Integrated Circuit,MMIC),其平均增益大于5.0dB。据R.Majidi-Ahy等在最近的IEEE-MTT学报上的论文所述,这种MMIC分布放大器具有迄今为止报导过的最高的工作频率和带宽(5～100GHz)。这种七段分布放大器的有源器件是晶格匹配的In_(0.53)Ga_(0.47)As-In_(0.52)Al_(0.48)AsHEMT,它们也是匹配到磷化铟(InP)半绝缘衬底上的。决定高频性能的关键因素是
The United States Varian company successfully developed single-stage 5 ~ 100GHz monolithic millimeter-wave integrated circuit (Monolithic Millimeter-Wave Integrated Circuit, MMIC), the average gain greater than 5.0dB. According to a paper by R. Majidi-Ahy et al. In a recent IEEE-MTT Journal, this MMIC distribution amplifier has the highest operating frequency and bandwidth (5-100 GHz) reported to date. The active devices of the seven-segment distribution amplifier are lattice-matched In_ (0.53) Ga_ (0.47) As_In_ (0.52) Al_ (0.48) AsHEMTs, which are also matched to indium phosphide of. The key factor that determines high frequency performance is