A generalized method for the analysis of microstrip antennas, which are placed on or embedded in hemispherical multilayer structures, is presented. By using corresponding full-wave equivalent circuits, the dyadic Green's functions of these structures and their system equations for the tangential field components at the interfaces can be analytically derived in a simple way. The numerical results are verified with commercial software codes. Some effects of the curvature and the ground plane on the input impedance of microstrip antennas are shown. © 2008 IEEE.

Giang T.V.B., Dreher A.

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Từ khóa : Antennas; Convergence of numerical methods; Differential equations; Equivalent circuits; Green's function; Microstrip antennas; Microwave antennas; Multilayers; Wave equations; Analysis methods; Commercial softwares; Conformal antennas; Dyadic green's functions; Field components; Generalized methods; Ground planes; Hemispherical structures; Input impedances; Multilayer structures; Numerical results; Numerical techniques; Spherical sector structures; System equations; Method of moments