UHF and VHF: What is the difference?

When it comes to two-way radios, there are two main frequency bands that are commonly used: 403-470 MHz UHF (ultra high frequency) and 136-174 MHz VHF (very high frequency). Each band has its own advantages, which makes them suitable for different applications and industries. In this article we explore the differences between UHF and VHF, and when it is best to use each.

What is UHF?

UHF refers to the frequency range between 300 MHz and 3 GHz. It is known for its shorter wavelength and, as the name states, higher frequency, which allows it to bounce around obstacles such as buildings, trees and walls more effectively. This makes UHF ideal for indoor use and areas with a lot of obstructions, such as around buildings and within city limits. It is commonly used in construction, film studios, office applications, hotels, event management and hospitality industries such as cruise ships. A shorter wavelength also means the radio uses a shorter antenna rather than a longer whip.

What is VHF?

VHF refers to the frequency range between 30 MHz and 300 MHz. It has a longer wavelength and lower frequency than UHF. VHF signals travel longer distances in open areas and are less likely to be absorbed by obstacles, which makes VHF suitable for outdoor use and areas with a clear line of sight. It is commonly used in agriculture, transportation (when a repeater is not available), forestry, some exploration applications, and by search and rescue teams.

The choice between UHF and VHF depends on the specific needs of your industry or application, and there is not always a straightforward answer. Factors such as the environment, range, potential obstacles and interoperability with other users should all be taken into consideration.

UHF is best suited to indoor use and areas with obstacles, while VHF is more suitable outdoors. By understanding the factors that influence the choice, you can start to work out what your application requires. B.C. Communications can help decide what is right for you and set up systems proven to work.

Shop UHF and VHF radios

We stock both bands across the range. Browse portable two-way radios for hand-held walkie talkies, or mobile radios and base-stations for vehicles and dispatch desks. Whichever band you choose, the frequency itself has to be licensed. See how to licence two-way radios in Canada.

To find what will work for you, contact us.