Title :
VLF transmitting antennas multiple-tuning vs single-tuning
Author_Institution :
Commun. Res. Centre, Ottawa, Ont., Canada
Abstract :
Reports on a detailed study of multiple-tuned VLF antennas by experimental and numerical modelling. The experimental model was placed on a 30 metre diameter elevated ground plane, so that the instruments to measure impedance and the effective height of an antenna under test could be deployed from beneath the wire grid ground plane. To measure impedance either a Hewlett-Packard RF impedance analyzer Model 8505A or a Model 4194A were employed. The numerical modelling studies used the numerical electromagnetic codes NEC-3 and MININEC-3. The MININEC computer program uses an IBM compatible microcomputer
Keywords :
broadcast antennas; digital simulation; electric impedance measurement; height measurement; telecommunications computing; tuning; Hewlett-Packard RF impedance analyzer; IBM compatible microcomputer; MININEC computer program; MININEC-3; Model 4194A; Model 8505A; NEC-3; VLF transmitting antennas; antenna under test; elevated ground plane; experimental modelling; height measurement; impedance measurement; multiple tuning; numerical electromagnetic codes; numerical modelling; single tuning; wire grid ground plane;
Conference_Titel :
Antennas and Propagation, 1991. ICAP 91., Seventh International Conference on (IEE)
Conference_Location :
York
Print_ISBN :
0-85296-508-7
