Title :
Demonstration of the discontinuity-radiation concept for a dielectric rod antenna
Author :
Ando, T. ; Yamauchi, J. ; Nakano, H.
Author_Institution :
Coll. of Eng., Hosei Univ., Tokyo, Japan
Abstract :
The radiation mechanism of a dielectric rod antenna can be explained by the so-called discontinuity-radiation concept (DRC). We demonstrate the DRC for a dielectric rod antenna using the FDTD method. For this, the total field along the rod is decomposed into a space wave (SPW) generated at the feed end and a surface wave (SUW) propagating along the rod. The SW is evaluated by the imaginary-distance beam-propagation method based on Yee´s mesh (YM-BPM). Furthermore, a terminal radiation pattern (TP) generated from the free end and a feed radiation pattern (FP) generated from the feed end are calculated using the SUW and SPW, respectively. It is numerically revealed that the radiation pattern of a dielectric rod antenna is formed by the superposition of the TP and FP.
Keywords :
antenna feeds; antenna radiation patterns; antennas; dielectric devices; finite difference time-domain analysis; surface electromagnetic waves; FDTD method; Yee´s mesh; dielectric rod antenna; discontinuity-radiation concept; feed end; feed radiation pattern; imaginary-distance beam-propagation method; space wave; surface wave propagation; terminal radiation pattern; total field; Concurrent computing; Dielectrics; Distributed computing; Feeds; Frequency; Optical reflection; Optical surface waves; Optical waveguides; Propagation constant; Reflector antennas;
Conference_Titel :
Antennas and Propagation Society International Symposium, 2000. IEEE
Conference_Location :
Salt Lake City, UT, USA
Print_ISBN :
0-7803-6369-8
DOI :
10.1109/APS.2000.875352
