Radio frequency (RF) is a representation of the oscillation rate of the electromagnetic spectrum measured in hertz (Hz).
How is RF created?
Radio frequency is created when an alternating current (AC) passes through a conductive cloth. It is widely used in communications and broadcasting applications such every bit transmitters and antennas. The waves are characterized by their length (centimeters) and frequency (Hz). The wavelength and frequency are inversely proportional to each other which means if the frequency increases, the wavelength decreases. When the radio frequency is transmitted it is not visible or audible to humans.
Properties of Radio Frequency
One of the core backdrop of radio frequency is that it tin radiate into space as radio waves. Another holding of radio frequency is highlighted in the pare consequence, in which RF is shown to non penetrate deep into electrical conductors. Instead, information technology flows along the surface of the usher. However, radio frequencies have the ability to ionize the air, making a conductive path.
Some other property of radio frequency is that information technology can be blocked past a bend in wire or curl wire. It likewise has the power to reflect and travel back downwards cablevision towards the source.
How is RF used?
Aside from radio receivers, many kinds of technologies rely on RF field propagation to transmit and receive data. These include
remote controls, microwave ovens,
transceivers, among others.
wireless LANs (WLANs)
also operate using radio frequencies.
Other applications of radio frequency include contactless debit and credit card use, automobile immobilizers, RFID inventory tags, door access cards, ePassport and security cards, transit payments, and price payment tags.
RF and medicine
Radio frequency does not cause any sensation of pain in the man body, making it useful in several medical applications.
Radio frequency has been used in medical applications for over a century. The proper radio frequency allows information technology to exist used for minimally invasive surgeries and other medical procedures. Some of the about common applications of radio frequency include the treatment of cancer, diathermy, ablation procedure, and more.
Radio frequency is also used to reshape the cornea to help correct vision. Information technology is also unremarkably used in cosmetic procedures such equally skin tightening, apoptosis, and reducing fat by lipolysis.
RF ranges: How is RF measured?
is equal to i cycle per second, and most radio frequencies are measured in hundreds, thousands, millions, or billions of cycles per second. Radio frequencies are able to carry
fields via specialized antennas and transmitters.
RF in item is a measurement of the oscillation rate of the electromagnetic radiation spectrum ranging from around 9 kHz to 300 GHz. However, dissimilar sources specify different ranges for radio frequency with some sources specifying the lower limit to be as low as 3 kHz.
The radio frequency spectrum was given a formal naming structure by the
International Telecommunications Union (ITU)
in the 1800s. The language that designates each ring in the spectrum is very specific and should be used carefully. The RF spectrum is equally follows:
Tremendously depression frequency
(TLF): < 3Hz
Extremely low frequency
(ELF): 3-30 Hz
Super low frequency
(SLF): 30-300 Hz
(ULF): 300-3000 Hz (3 kHz)
Very low frequency
(VLF): three-30 kHz
(LF): 30-300 kHz
(MF): 300-3000 kHz (3 MHz)
(HF): 3-30 MHz
Very high frequency
(VHF): 30-300 MHz
(UHF): 300-3000 MHz (iii GHz)
Super high frequency
(SHF): iii-30 GHz
Extremely loftier frequency
(EHF): xxx-300 GHz
Tremendously high frequency
(THF): 300-3000 GHz (iii THz)
As indicated in the list higher up, 1
is equal to i,000 hertz (Hz), one
is equal to i,000 kilohertz, one
is equal to 1,000 megahertz, and one
is equal to 1,000 gigahertz.
Is RF harmful?
Higher radio frequencies are thought to have cancerous effects on the human body after repeated prolonged periods of exposure. However, significant numbers of research organizations take reported that there is either insufficient evidence to establish a causal relationship between radio frequencies and cancer or that there is the
for radio frequency radiation to have carcinogenic effects.
However, this is an ongoing field of biomedical enquiry.