very high frequency wikipedia - EAS
- Very high frequency ( VHF) is the ITU designation for the range of radio frequency electromagnetic waves ( radio waves) from 30 to 300 megahertz (MHz), with corresponding wavelengths of ten meters to one meter. Frequencies immediately below VHF are denoted high frequency (HF), and the next higher frequencies are known as ultra high frequency (UHF).
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See all on Wikipediahttps://en.wikipedia.org/wiki/Very_high_frequencyVery high frequency (VHF) is the ITU designation for the range of radio frequency electromagnetic waves (radio waves) from 30 to 300 megahertz (MHz), with corresponding wavelengths of ten meters to one meter. Frequencies immediately below VHF are denoted high frequency (HF), and the next higher … See more
Radio waves in the VHF band propagate mainly by line-of-sight and ground-bounce paths; unlike in the HF band there is only some reflection at lower frequencies from the ionosphere (skywave propagation). They do not follow … See more
VHF is the first band at which wavelengths are small enough that efficient transmitting antennas are short enough to mount on vehicles and … See more
Australia
The VHF TV band in Australia was originally allocated channels 1 to 10-with channels 2, 7 and 9 … See moreVHF transmission range is a function of transmitter power, receiver sensitivity, and distance to the horizon, since VHF signals propagate under … See more
Certain subparts of the VHF band have the same use around the world. Some national uses are detailed below.
• 50–54 MHz: Amateur Radio 6-meter band.
• 108–118 … See moreIn some countries, particularly the United States and Canada, limited low-power license-free operation is available in the FM broadcast band … See more
Wikipedia text under CC-BY-SA license- https://nl.wikipedia.org/wiki/Very_high_frequency
Met very high frequency of VHF worden frequenties in het radiospectrum aangeduid tussen 30,0 en 299,9 MHz. De radiogolven hebben een golflengte van 1 m tot 10 m en worden daarom ook wel metergolf genoemd. Een andere benaming voor deze frequenties is ultrakortegolf, in het Duits aangeduid als UKW (voor Ultrakurzwelle). Dit moet echter niet verward worden met ultra-high frequency (UHF), de band die een stap hoger ligt dan VHF.
Wikipedia · Text under CC-BY-SA license- Estimated Reading Time: 4 mins
- https://en.wikipedia.org/wiki/High_frequency
- High frequency is the ITU designation for the range of radio frequency electromagnetic waves between 3 and 30 megahertz. It is also known as the decameter band or decameter wave as its wavelengths range from one to ten decameters. Frequencies immediately below HF are denoted medium frequency, while the next band of higher frequencies is known as th...
- Wavelength range: 100 to 10 m
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- https://it.wikipedia.org/wiki/Very_high_frequencySee more on it.wikipedia.org
- 50 MHz: riservate all'attività di radioamatore;
- 70 MHz: riservate al servizio di emergenza, al soccorso alpino, al SRD e al Ministero della difesa;
- 88–108 MHz: SRD e riservato al Ministero della difesa e alla radiodiffusione sonora in FM;
- 108–118 MHz: VORaeronautici;
- Estimated Reading Time: 3 mins
- https://en.wikipedia.org/wiki/Extremely_high_frequency
- Extremely high frequency is the International Telecommunication Union designation for the band of radio frequencies in the electromagnetic spectrum from 30 to 300 gigahertz. It lies between the super high frequency band and the far infrared band, the lower part of which is the terahertz band. Radio waves in this band have wavelengths from ten to on...
- https://en.wikipedia.org/wiki/VHF_omnidirectional_range
WebVery high frequency omnirange station (VOR) is a type of short-range radio navigation system for aircraft, enabling aircraft with a receiving unit to determine its position and stay …
- https://en.wikipedia.org/wiki/Talk:Very_high_frequency
WebGiven that the radius of the earth is 6373 km, and a mile is 5280 feet or 1609.344 metres, the asymptotically correct formula for the distance to the horizon in miles is sqrt (2 × …
- https://en.wikipedia.org/wiki/Ultra_high_frequency
WebUltra high frequency is the ITU designation for radio frequencies in the range between 300 megahertz and 3 gigahertz, also known as the decimetre band as the wavelengths range …
Very high frequency - Wikipedia
https://wiki.alquds.edu/?query=Very_high_frequencyWebSep 01, 2022 · Very high frequency(VHF) is the ITUdesignation[1]for the range of radio frequencyelectromagnetic waves(radio waves) from 30 to 300 megahertz(MHz), with …
- https://en.wikipedia.org/wiki/Very_low_frequency
WebVery low frequency or VLF is the ITU designation for radio frequencies in the range of 3–30 kHz, corresponding to wavelengths from 100 to 10 km, respectively. The band is …
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