Title :
Operation of AM Broadcast Transmitters into Sharply Tuned Antenna Systems
Author_Institution :
Bell Telephone Laboratories, Inc., Murray Hill, N.J.
fDate :
7/1/1949 12:00:00 AM
Abstract :
The impedance of some broadcast antenna arrays varies so much over the transmitted band as to impair the performance of the radio transmitter. The impairment consists in clipping of sidebands and distortion of the envelope at high modulation frequencies. This paper reports on an experimental determination of the nature and magnitude of this impairment and on its substantial reduction by suitable coupling methods.
Keywords :
Amplitude modulation; Antenna arrays; Distributed parameter circuits; Frequency modulation; Impedance; Radio broadcasting; Radio transmitters; Telephony; Transmitting antennas; Voltage;
Journal_Title :
Proceedings of the IRE
DOI :
10.1109/JRPROC.1949.233957
