摘要:一、什么是射频信号 射频信号（RF-Radio Frequency signal） 射频信号就是经过调制的，拥有一定发射频率的电波。 电磁波频率低于100khz时,电磁波会被地表吸收,不能形成有效的传输
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In fact, due to their lower frequency, at similar RF exposure levels, the body absorbs up to five times more of the signal from FM radio and television than from base stations.
事实上，由于频率较低，在射频接触水平相同的情况下，人体从调频收音机和电视吸收的信号比从基台吸收的信号要多四倍。
Conventional dual up-conversion transmitter usually employs an intermediate frequency (IF) mixer and a radio frequency (RF) mixer to convert baseband user signal to IF and RF in sequence.
传统双上变频发射器通常采用中频(IF)混合器和射频(RF)混合器将基带用户信号依次转换成IF和RF。
The distributed parameters of signal path of high frequency relay are the main factors that influence the radio frequency (rf) performances of relay.
高频继电器信号路径的分布参数是影响继电器射频(RF)性能的主要因素。
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