Frequently Asked Questions
Why Don’t All TV Antennas Pick Up VHF or UHF?
There are two major formats for two-way radios. They are Ultra High Frequency(UHF) radio and Very High Frequency (VHF) radio.
UHF is the industry standard, as VHF isn’t as popular anymore due to limitations with VHF technology. VHF isn’t used by any major channels anymore so finding a VHF antenna isn’t as common anymore.
UHF is the designation for radio frequencies in the range between 300 megahertz (MHz) and 3 gigahertz (GHz), also known as the decimetre band as the wavelengths range from one meter to 10 centimetres.
VHF is the designation for the range of radio frequency electromagnetic waves (radio waves) from 30 to 300 Megahertz (MHz), with corresponding wavelengths of ten to one meters.
VHF and UHF use different antennas. The most obvious difference between VHF and UHF antennas is the size. A half wave dipole for channel 2 will be 10 times longer than for channel 28. This means that a much more elaborate UHF antenna can be constructed without the antenna becoming physically unmanageable. With more elements added to the UHF antenna, higher gain and directivity can be obtained.
So overall, the main reason why all TV antennas can’t pick up UHF and VHF is because both frequencies need different shaped antennas to pick up the signal.