Title :
Excitation and coupling of microstrip patch antennas of circular geometry
Author :
How, Hoton ; Vittoria, Carmine
Author_Institution :
ElectroMagnetic Applications Inc., Boston, MA, USA
Abstract :
Green´s functions have been applied to calculate the coupling between multiple patch antennas of circular geometry. We consider M patches to be fed by N feeders. The patches are not necessarily of the same size and the feeders can be either coax lines or microstrips. The interaction between patches has shown long range dependence on the patch separation, indicating that the coupling between patches is due to exchange of surface waves. The resonant frequency and input impedance have been calculated for an isolated antenna and for two coupled identical patch antennas. Our calculation compares very well with experiments
Keywords :
Green´s function methods; antenna feeds; antenna theory; electric impedance; microstrip antenna arrays; microstrip antennas; surface electromagnetic waves; Green´s functions; circular geometry; coax lines; coupling; excitation; feeders; input impedance; isolated antenna; microstrip patch antennas; microstrips; multiple patch antennas; patch separation; resonant frequency; surface waves exchange; Coaxial components; Conducting materials; Dielectric losses; Dielectric substrates; Geometry; H infinity control; Microstrip antennas; Patch antennas; Surface impedance; Surface waves;
Conference_Titel :
Phased Array Systems and Technology, 1996., IEEE International Symposium on
Conference_Location :
Boston, MA
Print_ISBN :
0-7803-3232-6
DOI :
10.1109/PAST.1996.566082
