This program predicts approximate performance of general purpose, multiband, horizontal loop antennas of given perimeter of loop. It is not intended for precision predictions of operating data.
A loop is a continuous wire without loading coil or capacitor. It can be of any shape provided the area enclosed by the loop is not less than 2/3rds of that of a circle of the same perimeter, ie., it is not too irregular.
It is the sort of antenna which is forced on the amateur by the shape of his back garden and the pre-determined location of trees, poles, buildings or anything else from which an antenna wire can be suspended.
Analysis includes a high or low impedance feedline, a choke balun and an L-tuner. The antenna is most efficient when the perimeter is a whole number of wavelengths. It is least efficient when the perimeter is an odd-number of 1/2-wavelengths. But operation is not limited to being at, or near to, resonant frequencies.
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