Title :
Microstrip antenna on a spherical surface
Author :
Lima, A.C.d.C. ; Descardeci, J.R. ; Giarola, A.J.
Author_Institution :
Sch. of Electr. Eng., State Univ. of Campinas, Brazil
Abstract :
A cavity model with magnetic sidewalls is used for the analysis of a microstrip antenna on a spherical surface. Expressions for the fields in the cavity and for the calculation of the resonant frequency are obtained for each of the operating modes. The input impedance for the cavity fed by a coaxial line through its ground conducting spherical surface is obtained using a procedure similar to that presented by K.M. Luk et al. (1989). The fields radiated by the antenna are obtained by using dyadic Green´s functions, and by replacing the cavity by its equivalent magnetic current existing at the side wall of the cavity. Numerical results are presented.<>
Keywords :
Green´s function methods; antenna radiation patterns; antenna theory; electric impedance; microstrip antennas; cavity model; dyadic Green´s functions; equivalent magnetic current; input impedance; magnetic sidewalls; microstrip antenna; numerical results; radiation pattern; resonant frequency; spherical surface; Coaxial components; Equations; Geometry; Green´s function methods; Magnetic analysis; Magnetic resonance; Microstrip antennas; Resonant frequency; Shape; Surface impedance;
Conference_Titel :
Antennas and Propagation Society International Symposium, 1991. AP-S. Digest
Conference_Location :
London, Ontario, Canada
Print_ISBN :
0-7803-0144-7
DOI :
10.1109/APS.1991.174970
