Title :
The AM umbrella antenna
Author :
Christman, Alan M. ; Beverage, Clarence M.
Author_Institution :
Grove City Coll., PA, USA
fDate :
6/1/1999 12:00:00 AM
Abstract :
One of the greatest limiting factors in locating an AM broadcast tower is the significant amount of acreage occupied by the buried radials. The authors describe a novel method of feeding a grounded tower which overcomes this difficulty, since essentially no land is required for the earth connection. Computer-predicted values of the radiated electric-field intensity are competitive with those generated by conventional techniques. A scale model has been constructed, and measured results are discussed in comparison with computed values
Keywords :
amplitude modulation; antenna feeds; antenna radiation patterns; antenna testing; broadcast antennas; poles and towers; radio broadcasting; telecommunication computing; AM broadcast tower; AM umbrella antenna; buried radials; computer modelling; computer-predicted values; earth connection; grounded tower feeder; measured results; medium-wave broadcast antennas; radiated electric-field intensity; scale model; Broadcasting; Cable insulation; Cities and towns; Conductors; Earth; Frequency; Leg; Poles and towers; Soil; Wires;
Journal_Title :
Broadcasting, IEEE Transactions on
