What’s the difference between how HF and VHF/UHF radio waves travel?

What’s the difference between how HF and VHF/UHF radio waves travel?

Using field radio equipment for reliable communications requires you to understand the way radio waves travel. Once you’ve got a grasp of how High Frequency (HF) and Very High Frequency/Ultra High Frequency (VHF/UHF) radio waves carry information from A to B, you can optimise your radio network for more dependable communications.

This ensures you’ll never be stuck when you need to contact others and that your investment in establishing an interconnected HF/VHF network pay for itself in improved communications accuracy. So, back to basics – what is the difference between HF and VHF/UHF transmission?

How do HF radio waves travel?
HF frequencies (between 3-30 megahertz) are transmitted from a base unit or handheld transceiver into the Earth’s atmosphere. These radio signals ‘bounce’ off the ionosphere and return to land, where they are received by another transceiver tuned into the same radio band. This form of propagation means HF radio signals can be sent and received over hundreds or even thousands of kilometres, making HF radio an excellent tool for communicating between field locations or radio base stations across wide expanses.

This form of transmission also means data propagated by HF radio is less likely to be distorted by terranean objects such as buildings or mountains.

How do VHF/UHF radio waves travel?
VHF radio waves operate in a band between 30-300 megahertz, while UHF radio signals are propagated within 300 megahertz and 3 gigahertz. These radio waves travel over line of sight, making them ideal for local communications over a few kilometres. Indeed, UHF radio frequencies best suit communications within a one kilometre radius – perfect for indoor applications.

VHF radio waves normally travel within line of sight along the Earth’s surface.

What are the benefits of HF radio vs VHF/UHF radios?
Each mode of radio wave propagation is useful in different settings. HF radio, for example, is vital for base stations communicating with each other over vast distances, thanks to ionospheric transmission. HF radio is also useful for linking remote regions to the outside world, as HF radio communications is not reliant on conventional communications infrastructure.

Similarly, VHF/UHF radio is the perfect tool for field communications between numerous locations. As long as terranean objects such as hills or mountains don’t block the signal path, this radio wave improves communications accuracy significantly.

Barrett’s radio network interconnection options
The difference between HF and VHF/UHF transmission is application – if you build a radio communications network that gets the best out of individual devices, both HF radio and VHF/UHF radio equipment will be indispensable. However, in order to get the best out of both options, you need to seek the help of radio experts such as Barrett Communications to ensure your radio network is optimised and interconnected for peak performance.

For more important on getting your HF or VHF/UHF radio network started, contact the Barrett team today.

RELATED ARTICLES

Understanding the difference between SDR and HDR

There’s been a lot of excitement around the recent proliferation of software-defined radios. More Related News/Articles:What’s the difference between how HF and VHF/UHF…Making a difference in PeruHF digital vs analogue voice – what is the difference?What separates commercial HF radios from…

How HF digital voice mode improves workplace safety

One of the best new features of software-defined radios has been the introduction of digital voice mode. More Related News/Articles:Why linking HF radio with smart devices improves…How do VHF radio waves travel?What’s the difference between how HF and VHF/UHF…What 3 factors does HF radio offer critical communications?

Introducing the PRC-4090

With the books closed on the 2019 Defence and Security Equipment International Exhibition in London, a new range of tactical radio made its formal introduction to the world: the PRC-4090 tactical high-frequency software-defined radio. More Related News/Articles:Barrett previews PRC-4090 Tactical HF SDR at DSEIBarrett PRC-2080 VHF Tactical radio system End of…What’s under the lid of […]

Why do we need secure communication?

It’s no secret that data is one of the most lucrative currencies in the modern world. More Related News/Articles:Why Barrett’s FCC approval is key to our American HF…Why a sailing legend swears by HF radio for reliable…Encrypted critical communication – why HF radio excelsWhy medical teams need HF radio for disaster relief

How robust is the Barrett 4050 HF SDR transceiver?

For those working in field operations, interrupted communication can threaten the success of squad movements and compromise safety. More Related News/Articles:The robustness of infrastructure-free HF radio…Why Barrett’s FCC approval is key to our American HF…How HF radio ease of use is helping humanitarian…Increasing communication with smart devices and HF radio

Are radio communications affected by climate change?

With extreme weather increasing in occurrence and sea temperatures rising, More Related News/Articles:Early warning and emergency HF Communications for…Barrett awarded three year contract with Canadian DNDDoes space weather impact tactical HF communications?Tactical HF vs VHF radio – when should I use them

Post by onchada_admin