VHF vs UHF Antennas: Which Do You Need?
VHF or UHF? It is one of the first questions in any two-way radio project, and the answer shapes everything from coverage to the size of the antenna on the roof. Here is the difference in plain English.
The Bands
- VHF (very high frequency): 30 to 300 MHz. Most professional VHF radio sits between 136 and 174 MHz.
- UHF (ultra high frequency): 300 MHz to 3 GHz. Most professional UHF radio sits between 380 and 470 MHz.
Where Each Band Works Best
VHF travels further over open ground and water, and bends a little more around hills. That makes it the choice for marine radio, aviation, agriculture and rural networks.
UHF has a shorter wavelength that finds its way through doors, windows and gaps in buildings more effectively. That makes it the usual choice for cities, warehouses, hospitals, retail and industrial sites. In the UK, TETRA, used by the emergency services, operates in the UHF band at 380 to 400 MHz.
Antenna Size
Antennas are sized to the wavelength, so VHF antennas are longer. A half-wave antenna at 160 MHz is close to a metre long; at 450 MHz it is around a third of that. UHF antennas are therefore easier to fit to vehicles and handhelds, and UHF Yagis are far more compact than VHF ones. Our guide to how Yagi antennas work shows the difference in element lengths.
Can One Antenna Cover Both?
Dual-band and wideband antennas exist, but every design is a compromise. For professional systems, an antenna tuned to your specific band will almost always outperform a general-purpose one. Match the antenna to the radio system first, not the other way round.
Quick Guide
- Open country, coast or water: VHF
- Built-up areas and inside buildings: UHF
- Marine and airband: VHF, set by regulation
- TETRA, DMR in towns, PMR446: UHF
Antennas for Each Band
- VHF: the VHF73 fibreglass antenna and the FOLDED DIPOLE - VHF for base stations
- UHF: the UHF43X fibreglass antenna for TETRA, DMR, P25 and LMR, and the FOLDED DIPOLE - UHF for base stations
Not sure which band suits your site? Ask our team: renair.co.uk/contact-us.
Frequently Asked Questions
Is VHF or UHF better for range?
Over open ground and water, VHF generally gives more range. In built-up areas and indoors, UHF often performs better.
Can I use a VHF antenna on a UHF radio?
No. The antenna must be tuned for the radio's frequency. A mismatched antenna gives poor range and can damage the transmitter.
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