Title :
A Critical Study of Two Broadcast Antennas
Author_Institution :
The Radio Air Service Corporation, Cleveland, Ohio
Abstract :
A theoretical study is made of a double doublet, determining the vertical radiation characteristics for various current ratios. Also, the horizontal field intensity is plotted as a function of the current ratio and phase angle. Three experimental designs are discussed. Fading measurements show the improvement of the upper doublet in comparison with a quarter-wave antenna. A theoretical study is made of a loaded quarter-wave antenna showing vertical radiation characteristics and horizontal field intensity as a function of the current distribution. Recording measurements verify that fading at a distance is materially reduced when the antenna is properly loaded.
Keywords :
Antenna measurements; Antenna theory; Current distribution; Design for experiments; Earth; Fading; Loaded antennas; Radio broadcasting; Radio transmitters; Transmitting antennas;
Journal_Title :
Radio Engineers, Proceedings of the Institute of
DOI :
10.1109/JRPROC.1936.227358
