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自60年代中期出现微波晶体管以来,系统设计者皆致力于在所有微波波段下采用晶体管放大器。最近外刊报导了一种在2～4千兆赫下具有40分贝增益的薄膜放大器,并被吹嘘为微波晶体管放大器方面的一个较大进展。此放大器的50欧姆匹配网络为整个信频程提供了非常低的输入和输出电压驻波比(1.3:
Since the advent of microwave transistors in the mid-1960s, system designers have been working on transistor amplifiers in all microwave bands. Recently, Foreign Journal reported a thin film amplifier with a gain of 40 dB at 2 to 4 GHz and has been touted as a major advance in microwave transistor amplifiers. The 50 Ohm matching network of this amplifier provides very low input and output voltage standing wave ratio (1.3: