Title :
Experimental investigation of very small low frequency transmitting antennas
Author_Institution :
Radio Soc. of Great Britain, Hertfordshire Univ., Hatfield, UK
Abstract :
This paper describes an experimental evaluation of small (h<λ/100) wire transmitting antennas for amateur radio applications at 136 kHz and 73 kHz. Efficiencies between 0.0033% and 0.13% are obtained, whilst the radiation pattern is found to be that of a short monopole. Causes of low efficiency, and discrepancy between measured and calculated field strengths are discussed.
Keywords :
antenna radiation patterns; field strength measurement; monopole antennas; radiocommunication; transmitting antennas; wire antennas; 0.0033 to 0.13 percent; 136 kHz; 73 kHz; LF transmitting antennas; amateur radio applications; antenna efficiency; field strength measurement; monopole. antenna; radiation pattern; very small low frequency transmitting antennas; wire transmitting antennas;
Conference_Titel :
HF Radio Systems and Techniques, 2003. Ninth International Conference on (Conf. Publ. No. 493)
Print_ISBN :
0-85296-755-1
DOI :
10.1049/cp:20030428
