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