Manipulation of the Radiation Characteristics of a Patch Antenna by Small Ferrite Disks Inserted in Its Cavity Domain

Author

Sigalov, Mark ; Shavit, R. ; Joffe, R. ; Kamenetskii, E.O.

Author_Institution

Dept. of Electr. & Comput. Eng., Ben Gurion Univ. of the Negev, Beer-Sheva, Israel

Volume

61

Issue

5

fYear

2013

fDate

5/1/2013 12:00:00 AM

Firstpage

2371

Lastpage

2379

Abstract

In this paper, it is shown how the radiation characteristics of a patch antenna can be manipulated by a small number of normally magnetized ferrite disks inserted in the resonant region of the patch. It is shown that a one- and dual-band circular polarized microstrip antenna can be obtained by taking advantage of the interaction of the antenna cavity field with the magnetized ferrite disks. The scattering and radiation parameters of the antenna are investigated. The dependence of the axial ratio and the return loss of the antenna on the position and the number of ferrite disks underneath the patch are analyzed. Experimental and simulation results are in good agreement.

Keywords

antenna radiation patterns; discs (structures); electromagnetic wave polarisation; electromagnetic wave scattering; microstrip antennas; multifrequency antennas; antenna cavity field; antenna radiation parameters; antenna scattering parameters; axial ratio; cavity domain; dual-band circular polarized microstrip antenna; normally-magnetized ferrite disks; one-band circular polarized microstrip antenna; patch antenna radiation characteristics; patch resonant region; return loss; Cavity resonators; Ferrites; Magnetic fields; Magnetic resonance; Patch antennas; Circular polarization; ferrite; microstrip antenna;

fLanguage

English

Journal_Title

Antennas and Propagation, IEEE Transactions on

Publisher

ieee

ISSN

0018-926X

Type

jour

DOI

10.1109/TAP.2013.2242830

Filename

6420893