Yagi antennas are a directional antenna. Most people are most familiar with the old TV antennas that were mounted outside on the roof of a home. This is a Yagi style antenna. The name Yagi refers to the designer that came up with this design or style of antenna.
This is a typical Yagi TV antenna (shown for reference only it will not work for cellular reception)
A Yagi antenna has many advantages over an Omni antenna. But it will take a little more work to install.
From this point we will be discussing Yagi antennas that are specifically for the Cellular frequencies and PCS frequencies.
These are examples of different style/frequency Yagi antennas
First we need to discuss polarization of the signal. The first picture is of a TV antenna mounted to a pole in a horizontal position this means that the receiving elements of the antenna are horizontal to the ground. With a cellular Yagi antenna the polarization needs to be vertical. This means that the elements that attach to the boom of the antenna will be vertically mounted.
Some times the Yagi antenna is encased in plastic cover this is to protect the antenna from the weather and to make it more aesthetically pleasing. Below you will find examples of this style antenna mounted to a pole. I also removed the plastic covering to show why the antenna needs to be mounted in this fashion and the last picture is an example of what not to do.
This is an example of a properly mounted antenna. As you can see from the second picture the narrow end is the end that will be pointed in the direction of your best signal for your cellular provider.
This is an example of how not to install a Yagi antenna to a pole.
Now lets discuss were to mount the pole and antenna on your building. Because this style antenna receives signal from the narrow end and rejects signal from the wide end the antenna will need to be placed on the outside of the home as high as possible an the side that has the best signal. You do not want the antenna mounted for example on the back of the home but be pointed across the roof of the home.
This is an example of a properly mounted antenna.
This is an example of a Yagi antenna mounted on the wrong side of a building pointed across the roof.
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Jay Nelson
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Right selection of Tv antenna installation is necessary otherwise always getting problems day by day and 1 day all parts of TV Installation is destroy.Thanks for all the valuable information that you have provided.
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