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.
Harris will supply Falcon II RF-5800H high-frequency (HF) radio systems for long-haul, beyond line-of-sight terrestrial communications.
Harris公司将提供Falcon II RF - 5800 H长途高频(HF)无线电系统,具有超视距地面通信能力。
3
Conventional dual up-conversion transmitter usually employs an intermediate frequency (IF) mixer and a radiofrequency (RF) mixer to convert baseband user signal to IF and RF in sequence.