Radio frequency - Wikipedia
网页Radio frequency (RF) is the oscillation rate of an alternating electric current or voltage or of a magnetic, electric or electromagnetic field or mechanical system in the frequency [1] range from around 20 kHz to around 300 GHz.
射频 - 百度百科
网页射频（RF）是Radio Frequency的缩写，表示可以辐射到空间的电磁频率，频率范围从300kHz～300GHz之间。 射频就是射频电流，简称RF，它是一种高频交流变化电磁波的简称。
RadioReference | Home
网页Explore and search our database of over 224K identified frequencies and 7.1K trunked radio systems.
What is radio frequency (RF, rf)? - Definition from WhatIs.com
网页Radio frequency (RF) is a measurement representing the oscillation rate of electromagnetic radiation spectrum, or electromagnetic radio waves, from frequencies ranging from 300 gigahertz (GHz) to as low as 9 kilohertz (kHz).
射频 - 维基百科，自由的百科全书
网页射频 （英语： Radio frequency，缩写为RF）又称 无线电频率 、 无线射频 、 高周波，为在 3kHz至 300GHz这个范围内的振荡频率，这个频率相当于 无线电波 的 频率，以及携带著 无线电 信号 的 交流电 的 频率 [1] 。 RF通常被用来指 电子 振荡，而不被用在 机械 振荡上，然而 机械 射频系统仍然是存在的（如 机械滤波器 与 射频微机电系统 （英语：RF MEMS））。 虽然射频在定义上是用来指一种 频率，但在日常使用中，常被用来当成 无 …
What Is RF and Why Do We Use It?
网页Learn about electromagnetic radiation and why it is so useful for wireless communication. When we think of electricity, we naturally think of wires. From high-voltage transmission lines to tiny traces on a printed circuit board, wires are still the fundamental means of transferring electrical energy from one location to another.
射頻 - 维基百科，自由的百科全书
网页射頻（英語： Radio frequency ，縮寫為RF）又稱無線電頻率、無線射頻、高周波，為在 3kHz至 300GHz這個範圍內的振盪頻率，這個頻率相當於無線電波的頻率，以及攜帶著無線電 信號的交流電的頻率 [1] 。
How the Radio Spectrum Works - HowStuffWorks
网页2023年4月10日 · Radio waves have different frequencies, and by tuning a radio receiver to a specific frequency you can pick up a specific signal. In the United States, the FCC (Federal Communications Commission) decides who is able to use which frequencies for which purposes, and it issues licenses to stations for specific frequencies.
What is Radio Frequency (RF) - RF Global Solutions Ltd
网页Radio frequency (RF) is a rate of oscillation in the range of around 3 kHz to 300 GHz, which corresponds to the frequency of radio waves, and the alternating currents which carry radio signals. RF usually refers to electrical rather than mechanical oscillations; however, mechanical RF systems do exist. Although radio frequency is a rate of ...
What Is Radio Frequency? - RF World
网页Radio Frequency is a term that is usually referring to a rate of oscillation that takes place in the range of 30 kHz to 300 Ghz. These correspond to a special frequency that is used to transmit and receive radio waves, which is where the name comes from.
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