Title :
Characterization of a high frequency Beverage antenna using a fiber-optic measurement technique
Author :
Rao, B.R. ; Jones, D.N.
Author_Institution :
MITRE Corp, Bedford, MA, USA
Abstract :
R.W.P. King (1983, 1990) has proposed a rigorous, generalized theory for the Beverage antenna above a dielectric half-space. The authors report extensive experimental and theoretical investigations that validate King´s theory for a high-frequency Beverage antenna located above the earth. The antenna consists of a No.14 gauge copper wire, 180 ft in length, supported above the ground by wooden posts. One end of the antenna is connected to a signal source through a transformer/balun, and the other end is terminated in a suitable matched load. A novel fiber-optic measurement set-up has been used to measure the complex propagation constant (attenuation and phase velocity) of the current distribution along the antenna for various frequencies and antenna heights above ground. The amplitude and phase of the measured current distribution are shown to agree with those calculated from King´s theory for two different antenna heights of 12 in and 64.5 in above the earth.<>
Keywords :
dipole antennas; electric current measurement; optical links; 12 in; 180 ft; 64.5 in; No.14 gauge copper wire; antenna heights; complex propagation constant; current amplitude; current distribution; current phase; fiber-optic measurement technique; high frequency Beverage antenna; matched load; signal source; transformer/balun; wooden posts; Antenna measurements; Antenna theory; Antennas and propagation; Attenuation measurement; Current distribution; Current measurement; Earth; Frequency measurement; Phase measurement; Velocity measurement;
Conference_Titel :
Antennas and Propagation Society International Symposium, 1991. AP-S. Digest
Conference_Location :
London, Ontario, Canada
Print_ISBN :
0-7803-0144-7
DOI :
10.1109/APS.1991.175060
