Very high frequency (VHF) channel refers to a range of radio-radio frequencies generally allocated for broadcast, communication and navigation purposes. In the United States, VHF frequencies range from 30 MHz to 300 MHz. VHF channels are commonly used for FM radio broadcasting, television broadcasting (channels 2 to 13), aircraft communication and navigation, maritime communication, and public safety services.
VHF signals travel relatively long distances by line-of-sight propagation and can penetrate foliage and buildings to some extent, making them suitable for various applications.
The highest frequency levels refer to the upper limits of the electromagnetic spectrum, where frequencies are extremely high. These frequencies are typically found in the Terahertz (THz) range and beyond, corresponding to wavelengths measured in micrometers or nanometers.
The higher frequencies are used in specialized scientific and industrial applications, including spectroscopy, imaging, and certain types of wireless communication that require very high data rates and precise control over electromagnetic radiation.
The Ultra High Frequency (UHF) channel refers to a range of radio frequencies higher than VHF, typically ranging from 300 MHz to 3 GHz. UHF channels are widely used for television broadcasting (channels 14 to 83), satellite communication, cellular networks, Wi-Fi, Bluetooth, and various military and aerospace applications.
UHF signals can carry more data and are less susceptible to interference compared to lower frequency bands, making them suitable for modern telecommunications and broadcast systems.
Highest media frequency refers to the highest frequency range used to transmit electromagnetic signals through various media, including air, water, and solid materials. In free space (air), the highest media frequencies can extend into the infrared, visible, and ultraviolet regions of the electromagnetic spectrum, beyond x-rays and gamma rays.
In other media such as water or solids, the highest frequencies depend on the electrical properties of the material and the absorption characteristics of electromagnetic waves.
Very high frequency (VHF) signals generally refer to radio frequencies between 30 MHz and 300 MHz. These frequencies are commonly used for various communications and broadcasting purposes due to their ability to travel relatively long distances via line-of-sight propagation.
VHF frequencies are rated for their penetration capabilities through foliage and buildings to some extent, making them suitable for applications such as FM radio broadcasting, television broadcasting, aircraft communication and maritime communication