radio spectrum
Wireless transmission range
The radio spectrum is the range of electromagnetic frequencies used for wireless communication—from AM radio at the low end through FM, television, cellular signals, Wi-Fi, and satellite transmissions at higher frequencies.
Governments regulate and allocate portions of the spectrum to prevent interference between broadcasters, military operations, and commercial services.
The auction of radio spectrum licenses raised billions for the treasury.
Pre-midday designation
- FMCarrier wave frequency variation
- shortwaveHigh-frequency radio band
- longwaveLow-frequency radio transmission
- mediumwaveRadio frequency band
airwaves · transmitter · antenna · terrestrial · DAB · simulcast · programming · broadcast tower
Pre-midday designation
- FMCarrier wave frequency variation
- amplitudeMaximum oscillation displacement
- frequencyRate of recurrence
- phaseDistinct period in sequence
carrier wave · sideband · PSK · analog · digital · encoding · baseband · multiplexing
Spatial repetition interval
- frequencyRate of recurrence
- transmissionSending of information
- receptionAct of receiving guests
- interferenceUnwelcome involvement in affairs
attenuation · reflection · refraction · diffraction · multipath · fading · line-of-sight · ionospheric
Composed of small units
- 4GFourth-generation mobile technology
- 5GCurrent mobile network standard
- LTEWireless broadband standard
- Wi-FiWireless network standard
Bluetooth · NFC · microwave · satellite · GPS · radar · UHF · VHF
Data transmission capacity
- licensingGranting official permission
- FCCBroadcast oversight agency
- assignmentAllocated work or duty
- regulationOfficial rules governing conduct
AM
Pre-midday designation
- FMCarrier wave frequency variation
- shortwaveHigh-frequency radio band
- longwaveLow-frequency radio transmission
mediumwave · airwaves · transmitter · antenna · terrestrial · DAB · simulcast · programming · broadcast tower · signal strength
AM
Pre-midday designation
- FMCarrier wave frequency variation
- amplitudeMaximum oscillation displacement
- frequencyRate of recurrence
phase · carrier wave · sideband · PSK · analog · digital · encoding · baseband · multiplexing · CDMA
wavelength
Spatial repetition interval
- frequencyRate of recurrence
- transmissionSending of information
- receptionAct of receiving guests
interference · attenuation · reflection · refraction · diffraction · multipath · fading · line-of-sight · ionospheric · tropospheric
cellular
Composed of small units
- 4GFourth-generation mobile technology
- 5GCurrent mobile network standard
- LTEWireless broadband standard
Wi-Fi · Bluetooth · NFC · microwave · satellite · GPS · radar · UHF · VHF · mobile communications
bandwidth
Data transmission capacity
- licensingGranting official permission
- FCCBroadcast oversight agency
- assignmentAllocated work or duty
- broadcastingbroadcasting, TV, television, news, broadcast
- Electromagnetic Wavesvisible light, infrared light, ultraviolet light, gamma rays, X-rays
- radiocrystal set, AM, FM, news broadcast, AM/FM
- nationalized sectorsrailways, postal service, national bank, national railway, public utilities
- radio wavesRF, AM, FM, frequency modulation, amplitude modulation
- Spectra
radio spectrumgamma rays
Highest-frequency electromagnetic radiation
X-rays · gamma radiation · visible light · optical spectrum · visible spectrum
radio spectrumfiber optics
Light-carrying cable technology
landline · copper wire · physical media · wireline · coaxial cable
radio, spectrum, radios, radioactive, radiology, radiologist, radiological, radiologists, radioman