Antennas are more of an art than a science. There’s a lot that goes into getting that TV picture just right, but for the antenna hobbyist there’s nothing like seeing that crystal clear picture once everything is all set up. Here are six of the things you need to know:
A carrier wave is the most basic broadcast. If it is smooth like this, then it has no picture and sound information added to it.
A dipole is a fairly simple antenna, essentially a loop or two elements with a pair of wires coming from it. Old-school “rabbit ears” are dipoles as are the UHF “loop” antennas found on older TVs.
Elements are the separate parts of the antenna. In a big antenna they are the spikes that come out sideways or diagonally from the center. In a small antenna like this one you can see them as dark lines on the white plastic. Elements must be properly sized to receive different frequencies.
All television signals are frequency modulated. Starting with a carrier wave (see above) the frequency of the wave changes slightly depending on the information that is being carried. Digital and analog information can be stored on radio waves in this way.