The Most Powerful UHF & VHF Multi-Directional Antennas

Date:2014/11/26 11:25:50 Hits:

A powerful antenna pulls in distant signals with crystal-clear clarity, a necessity for modern high-definition digital signals. There’s a wide variety of antenna choices available for purchase, with the current most powerful model often being overshadowed by a new model soon after being made available. Choosing the most powerful on the market whenever you're shopping though, only requires an understanding of just what provides the power that you’re looking to use for your reception needs.


VHF & UHF Antenna Basics

Very High Frequency and Ultra High Frequency are electromagnetic wave bands used for over-the-air television broadcasts. Each band is defined by its frequency, with television stations located in the 30 to 300 megahertz frequencies placed in the VHF category and those of frequencies between 300 and 3000 MHz considered UHF. UHF channels can carry more data than VHF during broadcast and, as such, are used for high-definition television channels. UHF signals are shorter than their VHF counterparts are however, and travel shorter distances before noise interference makes them incapable of being received by antenna. To receive both frequency bands at once, a combined antenna is required. These combined antennas are constructed with sections specifically designed for receiving each frequency range.

Multidirectional Antennas

Multidirectional UHF and VHF antennas are designed to receive signals coming from any direction. This design makes them less powerful than unidirectional, directed, antennas which can be pointed directly at a signal source. The primary reason behind the reduction in power is the increase in signal noise due to the multidirectional antenna’s receiving signals from all directions at once.

Amplified Signals

VHF/UHF multidirectional capability is only the basis for a powerful antenna. Having to combine VHF and UHF reception calls for a compromise in the strength of reception from each frequency compared with a dedicated VHF or UHF antenna. Add to this the compromise made in creating a multidirectional antenna versus an aimed antenna, and you have a good base that lacks overall power. The compromises can usually be made up for with the addition of an amplifier. Adding an amplifier to an antenna has the effect of boosting signals received through the antenna. This electrical boost can clear up problems with intermittent reception or weak reception, returning a strong signal through your system. Strong retail antennas often come with amplifiers installed, but an aftermarket amplifier can be purchased and added to the antenna if one isn’t already present, or if you decide to build your own antenna.

Defining the Most Powerful

A multidirectional VHF/UHF antenna is one that’s filled with compromises that reduce its power in comparison to dedicated frequency directional antennas. This reduction doesn’t mean that there aren’t powerful antennas available that are capable of the full-frequency range as well as being multidirectional. For the most powerful choice, begin with an outdoor antenna. Placing the antenna outdoors helps to remove the interference caused by the walls of a structure. The signal can be received by the antenna and then sent into the structure via cables. The next step in the search is to concentrate on amplified antennas. Size is also a variable, with larger antennas capable of greater reception distances at higher signal strengths. When looking for the most powerful antenna available,concentrate on large roof-mounted models with amplification, as large as your structure can support safely.

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