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。

youdao

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。

youdao

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。

youdao

Its state-of-the-art radio frequency (RF) performance exceeds requirements established by EMVCo and the NFC Forum.

ENGADGET: Qualcomm announces cheap, battery efficient NFC chip, hopes to put it in phones next year

The concerns stem from the emissions of radio frequency (RF) radiation by both the handsets and the base stations that transmit and receive the signals.

BBC: Public Petitions Committee