Theoretical investigations of an annular elliptical ring microstrip antenna using Green's function technique

P. Mythili, Annapurna Das
1999 IEE Proceedings - Microwaves Antennas and Propagation  
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, ...) u d k e elliptical microstrip structures. The radiation pattern and input imedance curves of TMI2 mode on comparison with available
more » ... mental 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.
doi:10.1049/ip-map:19990432 fatcat:skgfljk37rbn7hbsjabammfoca