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UHF-Band LC Filter: Looking into the Basics of Ultra High Frequency Signals

UHF is a known radio frequency band that is often utilized in the broadcast of television signals. Smartphones and satellite radio also utilizes these frequency waves for them to operate properly. The acronym UHF stands for “Ultra High Frequency”.

UHF Frequencies

Any kind of RF filters, a UHF band LC filter for example, or other RF component that uses UHF transmissions has a radio frequency between the range of 300MHz and 1GHz. Any frequency that falls within this range is considered to be part of the UHF band. Plus, this range is less usually known as the decimeter range.

Frequencies that fall below the UHF band is automatically considered a part of the VHF range. On the other hand, frequencies above 1GHz are part of the Super High and Extreme High Frequency Band, and these two are known to be as the microwave frequency range.

UHF Basics

Comparing it with VHF (Very High Frequency) waves, UHF waves are much smaller that measures around 12 to 24 inches. As a result, antenna length is lowered to complement the radio range. Anything from a building to a human can impede UHF transmissions.

Generally, UHF only travels as far as line of sight. Anything impeding in the sight will also interfere with the frequency range, like buildings and tall trees. The transmission is just as high to enter through walls and thus making indoor reception possible. However, UHF is limited only to the line-of-sight broadcast range that may make UHF an unsuitable frequency in most cases. On the other hand, VHF provides a much larger broadcast range, which is being widely used in some industries.

Advantages and Disadvantages of UHF Signals

A huge advantage of UHF transmissions is the short wavelengths it creates with the help from high frequencies. The radio frequency size directly relates to the transmission length as well as the antenna’s reception. Basically, UHF waves are relatively short and wide.

One downside of UHF waves is that UHF equipment outweighs VHF equipment in terms of operation. Due to it requiring more work to produce UHF compatible devices centered on the way high frequency and short wavelengths radio signals connect with one another. The difference in expenses largely relates to the need for additional equipment, like antennas and cables.

Main Applications for UHF Signals

The UHF band is widely utilized for satellite communications and broadcasting, in mobile devices and pagers and by 3G wireless services. Aside from being utilized in broadcasting, UHF waves are also used in ships and aircraft navigation systems and for specific types of police communications. In some cases, radio communications between a spacecraft and a tracking station based on Earth are carried with the use of UHF signals.

It’s imperative to know the basics of the Ultra High Frequency signals to better understand the functions of RF filters using UHF signals, like a UHF Band LC filter, in communication systems. Without basic knowledge of such, one wouldn’t understand its main functions in broadcast communication in private uses or for public welfare.