What is radiofrequency?
Radiofrequency is a measurement that shows the oscillation rate of the electromagnetic radiation spectrum, or electromagnetic radio waves, from frequencies varying from 300 (GHz) to as low as 9 (kHz). With the aid of antennas and transmitters, an RF field can be applied and used for numerous types of wireless broadcasting and transmissions systems and technologies.
Radiofrequency is recorded and measured in units called hertz (Hz), which represent the number of cycles per second when a radio wave is transmitted. One hertz equals one cycle per second; radio waves spread from thousands (kilohertz) to millions (megahertz) to billions (gigahertz) of cycles per second.
In a radio wave, the wavelength is inversely corresponding to the frequency. We cannot see Radio frequencies. As it increased the frequency beyond that of the RF spectrum, electromagnetic energy takes the form of microwaves, infrared radiation (IR), visible, ultraviolet, X-rays and gamma rays.
How the radio frequency spectrum is used?
The radio frequency spectrum has a set of frequencies of the electromagnetic framework ranging from 30 Hz to 300 GHz. It is divided into several varieties, or bands, and given labels, such as low frequency (LF), medium frequency (MF) and high frequency (HF), for clearer identification.
Except for the lowest-frequency segment, each band represents an increase in frequency compared to an order of magnitude (power of 10). The supporting table depicts the eight bands in the RF spectrum, showing frequency and bandwidth ranges. The super high frequency (SHF) and extremely high frequency (EHF) bands are often referred to as the microwave spectrum
Why is radiofrequency (RF) energy important and what are the benefits?
Probably the most powerful use for RF energy is in presenting radiocommunication services all over the world from the public to industries to governments. Television and radio broadcasting, mobile phones, radio communications for emergency services, weather radar and satellite communications are some of the important real-world uses of Rf and microwave technology.
Non-communication uses of RF energy include industrial heating and microwave ovens. Some consumer uses of radiocommunication include baby monitors, garage door openers, cordless telephones, Wi-Fi, remote keyless car entry devices and various medical devices, just to name a few. As well, certain non-radio devices, including computers and other digital devices, also emit RF energy.