Title :
Numerical analysis of a dielectric rod antenna - demonstration of the discontinuity-radiation concept
Author :
Ando, Takashi ; Yamauchi, Junji ; Nakano, Hisamatsu
Author_Institution :
Fac. of Eng., Hosei Univ., Tokyo, Japan
Abstract :
A technique combining the finite-difference time-domain method and the imaginary-distance beam-propagation method is used to demonstrate the discontinuity-radiation concept for a dielectric rod antenna. The field near the rod is decomposed into a guided and an unguided wave. Using the two waves, the feed and terminal patterns are evaluated. It is numerically revealed that superposing the two patterns forms the radiation field of the antenna. The decomposition technique enables us to efficiently evaluate the directivity of a long rod antenna.
Keywords :
antenna radiation patterns; dielectric devices; directive antennas; electromagnetic wave propagation; finite difference time-domain analysis; antenna patterns; decomposition technique; dielectric rod antenna; discontinuity-radiation; feed patterns; finite-difference time-domain method; guided wave; imaginary-distance beam-propagation method; long rod antenna directivity; numerical analysis; radiation field; terminal patterns; unguided wave; Antenna arrays; Antenna feeds; Dielectrics; Finite difference methods; Frequency; Guidelines; Millimeter wave technology; Numerical analysis; Planar waveguides; Time domain analysis;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
DOI :
10.1109/TAP.2003.814731
