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本文叙述了作为组成通信卫星用的中频系统(4千兆赫)放大器以及主要从轻量,小型和高可靠性等要求考虑的晶体管放大器的实验结果。考虑到振动和冲击,电路采用了介质衬底两端由聚四氟乙烯支撑的三重线带状线电路。使用部件按高可靠性的设计目的考虑。取得了总增益为70分贝(十一级),带宽3.6～4.2千兆赫,增益平滑度为±0.8分贝,噪声系数为7分贝和总重量为260克的结果。并且对二级的放大器进行了振动试验(最大40克,50～5000周,36分钟),冲击试验(60克/12毫秒)和热真空试验,证实其电特性无异常。还有,作为卫星用的放大器,从可靠性角度也进行了研究。
This article describes the experimental results of a transistor amplifier as an intermediate frequency system (4 GHz) amplifier for communications satellites and mainly as a lightweight, compact, and high reliability. Taking into account the vibration and shock, the circuit uses a triple-stripline circuit supported by Teflon at both ends of the dielectric substrate. Use parts for high reliability design purposes. A total gain of 70 decibels (eleven levels), a bandwidth of 3.6 to 4.2 GHz, a gain smoothness of ± 0.8 dB, a noise figure of 7 dB and a total weight of 260 g was obtained. The two-stage amplifier was tested for vibration (max. 40 g, 50-5000 wk, 36 min), impact test (60 g / 12 msec) and thermal vacuum test to confirm that there was no abnormal electrical characteristics. In addition, as a satellite amplifier, reliability has also been studied.