Title :
Approximate versus exact methods in modeling a coaxially excited circular patch antenna
Author :
Bliznyuk, N.Y. ; Nosich, Alexander I.
Author_Institution :
Inst. of Radiophys. & Electron., Acad. of Sci., Kharkov, Ukraine
Abstract :
The fundamental antenna effects of a circular metallic patch antenna on a dielectric substrate backed by a perfectly conducting ground plane and excited by a vertical electrical dipole (VED) are investigated. The solution is numerically accurate in the resonant range due to the sophisticated method used. Resonance conditions are established which maximize the radiation power or efficiency. Criteria are determined for material properties and dimensions, for which surface waves are nearly eliminated and the radiation efficiency approaches 100 percent. Comparison with a magnetic ring model (MRM) for the thin substrates is given
Keywords :
antenna radiation patterns; approximation theory; dipole antennas; integral equations; microstrip antennas; resonance; antenna effects; circular metallic patch antenna; coaxially excited circular patch antenna; dielectric substrate; far field radiation patterns; integral equations; magnetic ring model; material dimensions; material properties; perfectly conducting ground plane; radiation efficiency; radiation power; resonance conditions; resonant range; surface waves; vertical electrical dipole; Coaxial components; Dielectric substrates; Dipole antennas; Finite wordlength effects; Integral equations; Magnetic resonance; Moment methods; Patch antennas; Symmetric matrices; Transmission line matrix methods;
Conference_Titel :
Mathematical Methods in Electromagnetic Theory, 1998. MMET 98. 1998 International Conference on
Conference_Location :
Kharkov
Print_ISBN :
0-7803-4360-3
DOI :
10.1109/MMET.1998.709875
