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How an Aerial aeral Works




How an Aerial Works

If you look at an aerial

The aerial consists of a arm
with elements across it
 at different intervals .
Then at one end it
looks like its got wings.


Picture of aerial

                                                 

What dose it all mean ?
If you look at the diagram below
will try to make some sense of it all 


Picture of an diagram of an aerial 


Picture of a aerial labeled with the parts of an aerial
The First part of the aerial to look at is the Dipole
This fits between the last  the reflector or wings as we call them .
The Dipole is the main part of aerial as it picks the TV signal up and sends it down the aerial cable to your Television.


The Dipole  is where you connect the aerial cable to.

Then you see the Directors

they are some times called the elements of the aerial .
But there job is to direct the TV signal towards the Dipole of the aerial.

You will see adverts

For 50 or 90

Element aerials .

This means that more elements or

directors on an aerial means more signal is sent down the aerial towards the dipole 

Picture of an Aerial on a Pole


The reflector or wings on the aerial has two jobs 
First they stop the TV signals that the directors have collected going any further than the end of the aerial and they reflect the TV signal back to the Dipole .

Picture of the reflectors on the back of an aerial



They also stop unwanted TV signals

coming in from the back end of the aerial
 
So when installing an aerial make sure the reflectors are at the back end of the aerial and the front end points towards the transmitter

Picture on which way to point an aerial


If you are thinking of installing an aerial

Terry recommends the 2 Aerials below





Standard Digital Aerial


Only £28


We suggest no more than
8 miles away from the Transmitter
Has a gain of around 11.5 db
Length 781mm
Can be used in vertical or horizontal polarization

Picture of an aerial






High Gain Aerial


Only £39


High Gain Digital Aerial
This aerial can be used up to
16 miles away from the transmitter
Can be used on a vertical or horizontal polarization
Has a gain of 15db
and a length of 1620mm

Picture of an Hi gain Aerial