Title :
Influence of surface-wave excitation on efficiency of space-wave launching in microstrip disc antennas
Author :
Fonseca, S.B.de A. ; Giarola, A.J.
Author_Institution :
Fundação Universidade de BrasÃ\xadlia, Departamento de Engenharia Elétrica, Brasilia, Brazil
Abstract :
The cavity model with magnetic side walls and dyadic Green´s functions was used to study microstrip disc antennas. Curves of efficiency of space-wave launching and directivity as functions of the ratio of the dielectric thickness to the disc radius d/a are shown for two dielectrics: ¿r=2.55 and 9.60. The results are useful for the design of these antennas.
Keywords :
antenna theory; microwave antennas; strip lines; cavity model; dielectric thickness; dyadic Green´s functions; magnetic side walls; microstrip disc antennas; space-wave launching; surface-wave excitation;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19820278
