VHF o UHF – Advantages and drawbacks

VHF or UHF - Advantages and drawbacks


The range at VHF is, theoretically, superior to that at UHF due to better penetration of the flora. However, we should clarify that into practice, and because of the electrical noise which exists at the VHF band (much higher than the one at UHF), we often get better range at UHF if we are well placed.

 -Background noise and interferences:

Trees and small obstacles between emitter and receiver produce a signal fading. The background noise existing at VHF can jam signals if the obstacles cause an excessive signal fading. If the signal is not above the background noise, we will not be able to distinguish the transmitter pulsing signal from the background noise and the signal reception will become impossible. This doesn’t happen at UHF because the background noise is much weaker at this frequency band. As a result, in many occasions we will get better range at UHF than at VHF. The interferences proceeding from industrial machinery, high tension lines, etc. will also avoid the proper reception of weak signals. This effect is importantly reduced when working at UHF.


At VHF, antennae are large and bulky (around 80 cm). On the other hand, at UHF these are small and easy-to-use (35 cm approximately). This fact allows us to use them really easily and with much more agility when we are tracking an animal. 

The use of VHF antennae, or lower frequencies, can remarkably difficult the activity especially in closed areas with lush vegetation.



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