Title :
Backing of microstrip patch antennas fed by coplanar waveguides
Author :
Giauffret, L. ; Laheurte, J.M.
Author_Institution :
Laboratoire d´´Electronique, Antennes et Telecommunications, Universite de Nice - Sophia Antipolis, CNRS, 250 rue Albert Einstein, 06560 Valbonne, France. Phone: +33-92 94 28 00, Fax: +33-92 94 28 12
Abstract :
A microstrip antenna fed by a conductor-backed coplanar waveguide is demonstrated. The addition of a back-side metallic ground plane involves a possible leakage of the CPW mode into Parallel Plate Modes (PPMs) or the excitation of these PPMs by the back-radiation of the coupling slot. A theoretical model, based on the solution of coupled integral equations, is validated by experimental results. It is shown that the power leakage can be avoided by a proper choice of the substrate characteristics.
Keywords :
Antenna feeds; Antennas and propagation; Coplanar waveguides; Green´s function methods; Integral equations; Microstrip antennas; Patch antennas; Permittivity; Planar waveguides; Resonance;
Conference_Titel :
Microwave Conference, 1996. 26th European
Conference_Location :
Prague, Czech Republic
DOI :
10.1109/EUMA.1996.337572
