Title :
Resonant modes of circular microstrip patches over ground planes with circular apertures in multilayered substrates containing anisotropic and ferrite materials
Author :
Losada, Vicente ; Boix, Rafael R. ; Horno, Manuel
Author_Institution :
Dept. of Appl. Phys., Seville Univ., Spain
fDate :
10/1/2000 12:00:00 AM
Abstract :
In this paper, the authors analyze how the resonant modes of circular microstrip patch resonators are affected by the presence of circular apertures in the ground plane located under the patches. A rigorous full-wave analysis in the Hankel transform domain (HTD) is carried out in order to obtain the resonant frequencies, quality factors, and radiation patterns of the circular microstrip patch resonators over ground planes with circular apertures. With the use of suitable Green´s functions in the HTD, the analysis is performed for the case where the circular patches, as well as the ground planes containing the apertures are embedded in a multilayered substrate consisting of isotropic dielectrics, uniaxial anisotropic dielectrics, and/or magnetized ferrites. The numerical results obtained are compared with experimental results, and good agreement is found. The results show that the circular apertures significantly affect the resonant frequencies of circular microstrip patches
Keywords :
Green´s function methods; Hankel transforms; Q-factor; antenna feeds; antenna radiation patterns; circular waveguides; microstrip antennas; microstrip resonators; Green´s functions; Hankel transform domain; circular apertures; circular microstrip patches; ground planes; isotropic dielectrics; magnetized ferrites; multilayered substrate; multilayered substrates; quality factors; radiation patterns; resonant modes; rigorous full-wave analysis; uniaxial anisotropic dielectrics; Apertures; Dielectric substrates; Green´s function methods; Magnetic analysis; Microstrip resonators; Pattern analysis; Performance analysis; Q factor; Resonance; Resonant frequency;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on