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What is the difference between radio frequency (RF) and microwave?

Time：2023-07-27

Radio frequency (abbreviated as RF), also known as radio frequency, radio frequency, high frequency, is an oscillation frequency in the range of 3 kHz to 300 GHz, which is equivalent to the frequency of radio waves and the frequency of alternating current carrying radio signals.

Among the radio frequency allocations defined by the International Telecommunication Union:

Very low frequency (VLF): 3~30 kilohertz (KHz).

Low frequency (LF): 30~300 kilohertz (KHz).

Intermediate frequency (MF): 300~3000 kHz (KHz).

High frequency (HF): 3~30 megahertz (MHz).

Very high frequency (VHF): 30~300 megahertz (MHz).

Ultra-high frequency (UHF): 300~3000 megahertz (MHz).

Ultra-high frequency (SHF): 3~30 GHz (GHz).

Very high frequency (EHF): 30~300 GHz (GHz).

Microwaves are electromagnetic waves with wavelengths between infrared and radio waves. The frequency range of microwaves is approximately between 300MHz and 300GHz. The corresponding wavelength is between 1 meter and 1 mm. Microwave frequencies are higher than radio frequencies and are also commonly referred to as "ultra-high frequency electromagnetic waves". Corresponds to the RF segment:

Ultra-high frequency (UHF): 300~3000 megahertz (MHz).

Ultra-high frequency (SHF): 3~30 GHz (GHz).

Very high frequency (EHF): 30~300 GHz (GHz).

Author: Zhihu user

Link: https://www. zhihu。 com/question/60818732/answer/866247567

Source: Zhihu

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