Surface wave excitation on a microstrip ring antenna

S Barroso De Assis Fonseca,A.J.M Soares,A.J Giarola

doi:10.1109/aps.1988.94264

Surface wave excitation on a microstrip ring antenna

S Barroso De Assis Fonseca, A.J.M Soares + Show 1 more

https://doi.org/10.1109/aps.1988.94264

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Publication Date: Jun 6, 1988

Citations: 1

Affiliation: Universidade de Brasília, Universidade Estadual de Campinas

#Microstrip Ring Antennas #Dyadic Green's Functions + Show 8 more

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Abstract

A theoretical analysis of surface wave excitation in microstrip ring antennas is presented. The problem is formulated using dyadic Green's functions with the space and surface wave fields obtained separately. The radiation efficiency is calculated for the TM/sub 11/, TM/sub 12/, and TM/sub 13/ modes. It is shown that the efficiency of the TM/sub 13/ mode has a maximum for a specified dielectric substrate. In addition, the efficiency of the TM/sub 11/, TM/sub 12/ and TM/sub 13/ modes approaches zero for increasing values of dielectric substrate thickness. The results shown here are of particular importance for the design of these antennas. >

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