High efficiency and high linearity space traveling wave tube (TWT) is required for satellite communication system as a high power, high gain microwaveamplifier.
作为卫星通讯系统所用的高增益、高功率微波放大器件，行波管的效率和线性是非常重要的。
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A 3 cm X-band microwave interferometer with a phase-locked amplifier as detector has been used to measure small phase changes as a microwave beam passing through the gas discharge tube.