The physical characteristics of these frequencies mean that VHF waves travel farther but are more susceptible to interference from structures, whereas UHF signals offer better quality and capacity but generally have a shorter range. For instance, a dipole antenna for channel 2 (VHF low) will be significantly longer than one designed for channel 48 (UHF).
Understanding TV Spectrum Management and Frequency Allocation
However, these lower frequencies are prone to atmospheric noise and electrical interference, which can manifest as static or ghosting. VHF operates in two bands, low-VHF (channels 2-6) and high-VHF (channels 7-13), while UHF covers the higher channels, ranging from 14 to 36.
This makes UHF the de facto standard for modern broadcasting, carrying the majority of high-definition channels despite its reduced range. Indoor antennas often struggle with UHF signals due to the higher frequencies being more directional and easily blocked by walls or electronic devices.
Understanding TV Spectrum Management and Frequency Allocation
In this process, broadcasters voluntarily relinquished some of their UHF frequencies, primarily in the 600 MHz band, which were then sold to telecommunications companies for wireless broadband services. Global Variations and Future Outlook.
More About Broadcast tv frequencies
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