Sergio: My friend told me that there is a new short signal radio technology.

塞吉奥：我的朋友告诉我，现在有一种新的短距离无线通信技术。

youdao

Firstly, the obtained radar signal radio frequency, pulse width, repeat frequency are composed to get a combined probability assignment function of radar parameters by applying D-S method.

首先，对侦察雷达所能探测到的目标雷达信号的载频、脉宽、重频，应用证据理论将其组合，得到雷达参数的联合概率分配函数。

youdao

A radio signal was sent to the spacecraft.

向宇宙飞船发出了无线电信号。

《牛津词典》

AM radio can be sent over larger distances, but the quality of the sound is not as good as a later kind of radio signal processing, called frequency modulation.

VOA: special.2010.12.08

Or maybe,instead of a radio signal, an alien civilization sent us something physical.

VOA: standard.2010.04.16

Would each individual person affect the RFID tag's radio signal in a unique way?

ENGADGET: Putting your finger on it

Would the sending of a radio signal to activate this system constitute a trespass to chattels?

FORBES: Scalia Finds 18th-Century Precedent For GPS Search

The fences work by burying a boundary wire which transmits a radio signal to a collar.

BBC: Monima O'Connor, Russell George and William Powell