ABSTRACT
The theory of related lines is a base for the analysis of antennas, consisting of parallel wires. The vertical long line of two wires is an equivalent of a folded antenna. An advantage of the folded radiator is in the first place the fact that they are substantially shorter than the linear antennas intended for operating at the same frequency. The method of calculating folded antennas is considered using for example an asymmetric folded radiator with a gap in an unexcited wire. Folded antennas have significant advantages over linear radiators: they allow twice to reduce the height, to increase the matching level and to increase the number of resonance frequencies within a given range, not less than in two times. The method of calculating an impedance folded radiator, similar to calculation of the metal folded radiator, is based on the theory of asymmetric lines.
