Title :
MF AM transmitting asymmetric vertical dipole
Author :
Trainotti, Valentin
fDate :
9/1/1991 12:00:00 AM
Abstract :
An asymmetric vertical dipole is proposed as an MF AM-broadcast station transmitting antenna. This kind of vertical dipole antenna uses the supporting guys as part of the radiating structure permitting an efficient radiation with a strong surface wave. It produces less high-angle radiation compared to a classic buried-ground-plane monopole of similar height. Analysis data for near fields and power density of monopoles, elevated ground plane monopoles, and asymmetric vertical dipoles are presented graphically to explain why this last antenna can match the radiation efficiency of the classical monopole without a buried ground plane. Good agreement between calculation and measurements is achieved in all cases studied
Keywords :
amplitude modulation; antenna radiation patterns; broadcast antennas; dipole antennas; MF AM-broadcast station; asymmetric vertical dipole; efficient radiation; elevated ground plane monopoles; near fields; power density; radiating structure; strong surface wave; supporting guys; transmitting antenna; Antenna measurements; Antenna radiation patterns; Broadcasting; Data analysis; Dipole antennas; Frequency; Interference; Near-field radiation pattern; Poles and towers; Surface waves; Transmitting antennas;
Journal_Title :
Broadcasting, IEEE Transactions on
