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Feb 23, 2017 · So in short, "scatter" (in many forms) is claimed as the mechanism that allows VHF signals to be heard hundreds of miles beyond the primary "radio horizon".
VHF refers to radio waves operating in the range of 30 to 300 megahertz with a shorter wavelength than high-frequency (HF) bands. These bands, as with those in the UHF spectrum, are limited to a range within the line of sight (LOS), since they are not refracted by the ionosphere like lower frequency bands.
Apr 21, 2024 · Hz (Hertz): One complete cycle of a radio wave per second. HF (High Frequency): High Frequency refers to the range of radio frequencies from 3 to 30 megahertz (MHz). HF transceivers operate within this frequency range, allowing for long-distance communication.
The principle of VHF (Very High Frequency) refers to the use of radio waves with frequencies between 30 and 300 megahertz. This article provides an overview of how VHF works and its applications in various industries, including broadcasting, aviation, and maritime communication.
VHF radio waves on the 30 to 300 megahertz range are also known as "frequency modulated" or FM waves, and are used for commercial radio and television broadcast. VHF signals can carry a higher amount of information, which is why the signal is clearer. FM waves are not refracted by the ionosphere.
Mar 2, 2022 · The VHF range is thought of as channels 2-13, while the UHF range (as we use it today) is channels 14-36. But there’s a little more to it than that. Between channels 6 and 7 are a chunk of frequencies that are used for things like FM radio. So it’s really better to think of VHF-Low (channels 2-6) and VHF-High (channels 7-13.)
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Be it a simple walkie-talkie communication or a sophisticated repeater station set up – un-derstanding propagation basics enables you to evaluate an individual radio link and to take the right steps for improvement.