Title :
An independently-fed log-periodic antenna for directed pulsed radiation
Author :
Excell, P.S. ; Tinniswood, A.D. ; Clarke, R.W.
Author_Institution :
Telecommun. Res. Centre, Bradford Univ., UK
fDate :
April 1 1999-March 31 1999
Abstract :
An antenna capable of radiating a band-limited pulse with minimal distortion, negligible loss and significant directivity is reported. A design was derived by modification of the conventional log-periodic dipole array to permit independent feeding of each dipole. This was modelled with an electromagnetic field computation program using the time-domain integral equation method and iterated to find a design that minimised phase dispersion across the operating frequency band. The antenna constructed was found to give a good-quality radiated pulse in the main beam direction, with weaker and dispersed waveforms in other directions, indicating significant directive gain.
Keywords :
dipole antenna arrays; band-limited pulse; directed pulsed radiation; directive gain; directivity; dispersed waveforms; electromagnetic field computation program; independently-fed log-periodic antenna; log-periodic dipole array; loss; main beam direction; operating frequency band; phase dispersion minimisation; radiated pulse; simulation; time-domain integral equation method;
Conference_Titel :
Antennas and Propagation, 1999. IEE National Conference on.
Conference_Location :
York, UK
Print_ISBN :
0-85296-713-6