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前售为了满足远距离传送微波调频信号的要求,必须对微波调频信号作功率放大。通常,采用行波管作为这种连续波动率放大器是行之有效的。这是因为行波管有如下的优良性能:它有极高的功率增益值。现在功率增益达三十多分贝的行波管只是很一般的水平。国外目前已有更大增益的行波管问世。例如,1980年2月法国汤姆逊公司的产品,用于卫星的TH3626型行波管频段为:12.50～12.75千兆赫,输出功率达20瓦,增
Pre-sale In order to meet the requirements of transmitting microwave FM signals over long distances, the microwave FM signals must be power amplified. In general, traveling wave tubes are effective as such continuous-rate amplifiers. This is because traveling wave tubes have the following excellent properties: They have very high power gain values. Now more than thirty decibels of power gain traveling wave tube is only a very general level. At present, the traveling wave tube with larger gain has come out abroad. For example, in February 1980, the Thomson-based company in France, the TH3626 TWT frequency band for satellites ranged from 12.50 to 12.75 GHz with an output power of 20 W,