论文部分内容阅读
东芝公司最近推出一种μM2300B型卫星通信地面站接收放大器,该放大器在室温(25℃)下,不用电子冷却装置噪声可降至2dB.实现低噪声主要原因是应用了高电子迁移率的晶体管:一个为18～30GHz频段的S8900型,另一个为12～18GHz频段的S8901型.这两个晶体管的放大倍数为传统GaAs晶体管的10倍,然而噪声却降低了一半,为0.1dB.这在同类产品中是最低的.此接收放大器用了六只S8900晶体管,其体积缩小到原放大器的六十分之一,重量仅为二十分之一,功耗为一百四十分之一,并有极高的工作效率.
Toshiba recently introduced a μM2300B satellite communications ground station receiver amplifier that reduces noise to 2dB without electronic cooling at room temperature (25 ° C). The primary reason for achieving low noise is the use of high electron mobility transistors: One for the S8900 18- to 30-GHz band and the S8901 12- to 18-GHz band, these two transistors are 10 times more powerful than conventional GaAs transistors but reduce the noise by half in 0.1dB, The receiver is the lowest. The receiver uses six S8900 transistor amplifier, which reduced the size of the original one-sixth of the amplifier, weighs only one-twentieth, the power consumption of one hundred forty-one, and Have a very high working efficiency.