Analytical expressions for the Green’s function of an annular elliptical ring microstrip
antenna (AERMA) are developed and reported. The modal, radiation and input impedance
characteristics of the TM, modes are determined from these expressions. The resonant frequencies of
odd modes are greater than that of the even modes for all TMnl modes (n = 1, 2, 3, ...) udke
elliptical microstrip structures. The radiation pattern and input imedance curves of TMI2 mode on
comparison with available experimental result shows good agreement whch provides an independent
validation to this technique. The performance of the AERMA is then investigated as a function of
thickness and substrate dielectric permittivity.
Description:
IEE Proc.-Microw. Antennas Propag., Vol. 146, No. 6, December 1999