(Askeri) TELSİZ FREKANSI: Boşluğa yayılan herhangi bir elektriki enerji frekansı. Telsiz frekansları normal olarak ses dalgası frekanslarından daha yüksektir
Английский Язык - Английский Язык
Определение radio frequencies в Английский Язык Английский Язык словарь
Radio frequency refers to a signal generated by a radio transmitter and sent out through an antenna The frequency of the transmission is described in terms of the number of cycles per second or Hertz (Hz) A radio would be tuned to this frequency in order to receive the transmission A radio signal is sometimes referred to by its initials, "RF"
Frequency in the portion of the electromagnetic spectrum between audible frequencies and infrared frequencies Present practical limits are roughly 10 kilohertz to 100,000 megahertz
RF (as oposed to IF) refers to the incoming frequency or band of frequencies being studied In an heterodyne receiver the RF is mixed down to an IF band In bolometers the RF band is measured directly
A frequency at which coherent electromagnetic radiation of energy is useful for communications Radio frequencies are designated as very low: <30 kHz, low: 30 to 300 kHz, medium: 300 to 3,000 kHz, high: 3 to 30 MHz, very high: 30 to 300 MHz, ultrahigh: 300 to 3,000 MHz, superhigh: 3 to 30 GHz, and extremely high: 30 to 300 GHz
GHz, MHz, Hz The international unit for measuring frequency is Hertz (Hz), which is equivalent to the older unit of cycles per second One Mega-Hertz (MHz) is one million Hertz One Giga-Hertz (GHz) is one billion Hertz For reference: the standard US electrical power frequency is 60 Hz, the AM broadcast radio frequency band is 0 55 -1 6 MHz, the FM broadcast radio frequency band is 88-108 MHz, and microwave ovens typically operate at 2 45 GHz
The group of electromagnetic wavelengths between 500 KHz and 300 GHz These wavelengths are used to transmit data or voice signals through the air, to avoid dependence on terrestrial wire transmissions
Any frequency within the electromagnetic spectrum normally associated with radio wave propagation (188) For designation of subdivisions, see electromagnetic spectrum and associated diagram
The frequencies of the electromagnetic spectrum normally associated with radio wave propagation Sometimes defined as any frequency at which transmission of coherent electromagnetic energy radiation is possible Any frequency at which electromagnetic radiation is useful for telecommunication
Typically a frequency from 20 kHz to 3 GHZ RF is usually referred to whenever a signal is radiated through the air Literally, any and all frequencies that can be radiated as an electromagnetic wave
That group of electromagnetic energy whose wavelengths are between the audio and the light range Electromagnetic waves transmitted usually are between 500 KHz and 300 GHz
Any ac frequency at which coherent electromagnetic radiation of energy is possible Usually considered to denote frequencies above 150 kilohertz and extending up to the infrared range