標籤: radio frequency

射頻（英语：Radio frequency，縮寫為RF），又稱無線電頻率、無線射頻、高周波，為在3 kHz至300 GHz這個範圍內的震盪頻率，這個頻率相當於無線電波的頻率，以及 ...

Radio frequency (RF) refers to the rate of oscillation of electromagnetic radio waves in the range of 3 kHz to 300 GHz, as well as the alternating currents carrying the radio signals. This is the frequency band that is used for communications transmission and broadcasting.

2017年11月16日 - An advantage of using RF to heat tissues, as opposed to lasers (which use higher-frequency light waves), is that the lower frequency of RF can safely penetrate to a deeper level, helping to improve skin tone and structure, even lifting tissues. Lasers for the most part work to improve the skin's surface.

RFS (Radio Frequency Systems) is a global designer and manufacturer of cable and antenna systems plus active and passive RF conditioning modules, ...

Radio frequency (RF) refers to an oscillation rate of an alternating electric current or voltage or of a magnetic, electric or electromagnetic field or mechanical system in the frequency range from around twenty thousand times per second (20 kHz) to around three hundred billion times per second (300 GHz).

The world's largest scanner frequency and radio communications reference source.

Radio frequency (RF) is any frequency within the electromagnetic spectrum associated with radio wave propagation.

A radio wave is an electromagnetic wave propagated by an antenna. Radio waves have different frequencies, and by tuning a radio receiver to a specific ...

A radio frequency (RF) signal refers to a wireless electromagnetic signal used as a form of communication, if one is discussing wireless electronics. Radio waves ...

Radio Frequency Co., a leading international developer/mfr. of advanced industrial RF processing systems for rapid heating and drying of materials such as ...