Modal analysis of dielectric loaded coaxial probe fed circular waveguide radiator

• Main Authors: Safavi-Naini, S., Ameri Mahabadi, H.
• Format: Conference or Workshop Item
• Language: English
• Published: 1991
• Subjects: TK Electrical engineering. Electronics Nuclear engineering
• Online Access: http://eprints.um.edu.my/3614/1/00175222.pdf; http://eprints.um.edu.my/3614/
• Institution: Universiti Malaya

An almost rigorous procedure for analyzing dielectric resonator antennas in cylindrical enclosures is presented. The resonant frequency and radiation pattern of a circular waveguide radiator have been analyzed by the method presented. The primary consideration in this special design has been the bandwidth. Experimental results and theoretical predictions for two cases (∈=4,12) are shown. As is evident from this comparison, the method has a reasonable accuracy. In both cases, a piecewise sinusoidal distribution for the probe current has been assumed. In general a limited number of modes in both inhomogeneous and homogeneous regions provides sufficiently accurate results for many practical cases