Theory and Experiment of Spherical Aperture-Coupled Antennas

Author

Meiguni, J.S. ; Kamyab, M. ; Hosseinbeig, A.

Author_Institution

Fac. of Electr. & Comput. Eng., K.N. Toosi Univ. of Technol., Tehran, Iran

Volume

61

Issue

5

fYear

2013

fDate

5/1/2013 12:00:00 AM

Firstpage

2397

Lastpage

2403

Abstract

Rigorous mathematical method of moments (MoM) for analyzing spherical microstrip aperture-coupled antennas is presented in this paper by using dyadic Green´s functions (DGF) in conjunction with magnetic field integral equation (MFIE) and electric field integral equation (EFIE) formulations. With the aid of linear Rao-Wilton-Glisson (RWG) triangular basis functions, spherical three-layer aperture-coupled patch antennas are analyzed. The effect of mutual coupling between slot and patch antenna is developed and the input impedance and radiation patterns of such an antenna are presented. A prototype of a spherical aperture-coupled antenna is fabricated and tested. The measurement results are compared to the results of the proposed method and a good agreement between the results is achieved. The measured efficiency and gain of this antenna at 3.15 GHz are 85% and 5.23 dB, respectively.

Keywords

antenna radiation patterns; electric field integral equations; magnetic field integral equations; method of moments; microstrip antennas; slot antennas; DGF; EFIE formulations; MFIE; MoM; RWG; antenna radiation patterns; dyadic Green functions; efficiency 85 percent; electric field integral equation formulations; frequency 3.15 GHz; gain 5.23 dB; input impedance; linear Rao-Wilton-Glisson triangular basis functions; magnetic field integral equation formulations; mathematical method of moments; mutual coupling; patch antenna; slot antenna; spherical microstrip aperture-coupled antennas; three-layer antennas; Antenna radiation patterns; Aperture antennas; Dielectrics; Impedance; Microstrip; Microstrip antennas; Patch antennas; Conformal aperture-coupled antennas; dyadic Green´s function (DGF); method of moments (MoM); spherical antennas;

fLanguage

English

Journal_Title

Antennas and Propagation, IEEE Transactions on

Publisher

ieee

ISSN

0018-926X

Type

jour

DOI

10.1109/TAP.2013.2244836

Filename

6428609