Title :
Theory and experiment of an aperture-coupled hemispherical dielectric resonator antenna
Author :
Leung, Kwok-Wa ; Luk, Kwai-Man ; Lai, Kin Y A ; Lin, Deyun
Author_Institution :
Dept. of Electron. Eng., City Univ. of Hong Kong, Kowloon, Hong Kong
fDate :
11/1/1995 12:00:00 AM
Abstract :
A hemispherical dielectric resonator (DR) antenna using aperture coupling for excitation is studied both theoretically and experimentally. The reciprocity method is used to formulate the problem. The exact magnetic field Green´s function due to the equivalent magnetic current in the slot is derived rigorously, and it is presented in a form which can be evaluated very efficiently. Moment method is used to solve the magnetic current from which the input impedance of the antenna configuration is obtained. The equivalent radius of the slot is used so that simple formulae developed for the cylindrical dipole can be applied directly. The effects of the slot´s length, the slot´s position, and the slot´s width on the broadside TE111 mode input impedance are studied, and reasonable agreement between theory and experiment is obtained
Keywords :
Green´s function methods; antenna theory; dielectric resonators; dipole antennas; electric impedance; method of moments; antenna configuration; antenna theory; aperture coupling; aperture-coupled hemispherical dielectric resonator antenna; broadside TE111 mode; cylindrical dipole; equivalent magnetic current; equivalent radius; excitation; experiment; input impedance; magnetic field Green´s function; moment method; reciprocity method; slot; slot length; slot position; slot width; Antenna theory; Aperture antennas; Aperture coupled antennas; Dielectric resonator antennas; Dipole antennas; Green´s function methods; Impedance; Magnetic fields; Moment methods; Tellurium;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
