L band is from 1 GHz to 2 GHz, so signals and antennas get very strange at these frequencies. The wavelength of a 2GHz signal is only 15cm, so small antennas can work quite well and are often as ...

A very low frequency needs a very large antenna ... shaped array of elements yet again along a central boom. A rooftop TV antenna is a great example of the type, called a Yagi-Uda array after ...