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四、民用微波半导体器件的民用有着极其广阔的领域,这里仅举几例,只能略见一斑,难见其应用的全貌。 1.海缆通信海缆通信近年来有很大发展。信号在电缆上传送时有一定损耗。为了补偿这种损耗,就需要用增音器,增音器是一个宽频带放大器,它以一定的间隔插入海底电缆。在这种宽频带放大器中必须采用微波晶体管。例如,六十年代以来,英国曾多次在英-美两国和英国-加拿大之间敷设多路通信用的海底电缆。在电缆增音器中的负反馈式宽频带放大器,采用了PO-
Fourth, civilian microwave semiconductor device has a very wide range of civilian areas, here to name a few, only a little obvious, difficult to see the full picture of its application. 1. Submarine communications Submarine communications have greatly developed in recent years. Signal transmission in the cable there is a certain loss. To compensate for this loss, a repeater is required. The repeater is a wideband amplifier that plugs submarine cables at regular intervals. Microwave transistors must be used in this wideband amplifier. For example, since the 1960s, Britain has repeatedly laid out multiple communications submarine cables between Britain, the United States and Britain-Canada. In the cable amplifier in the negative feedback broadband amplifier, using a PO-