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Analysis of hemispherical dielectric resonator antenna
Author(s) -
Luk K. M.,
Leung K. W.,
Lai K. Y. A.,
Lin D.
Publication year - 1993
Publication title -
radio science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.371
H-Index - 84
eISSN - 1944-799X
pISSN - 0048-6604
DOI - 10.1029/93rs00945
Subject(s) - dielectric resonator antenna , dielectric resonator , antenna (radio) , optics , dielectric , physics , resonator , transverse mode , coaxial , transverse plane , materials science , optoelectronics , electrical engineering , engineering , structural engineering , laser
This paper describes the analysis of a hemispherical dielectric resonator antenna fed by a coaxial probe. The electric field Green's function of a vertical point current located inside the dielectric hemisphere is derived by mode matching technique. Delta gap source excitation model is employed. The input impedance of the antenna is calculated using a variational formula. Both the broadside TE 111 mode (the lowest‐order transverse electric mode) and the end‐fire TM 101 mode (the lowest‐order transverse magnetic mode) are considered. Numerical calculations and experimental results validating the theory are shown. The variation of input resistance with dielectric constant of the antenna is studied.