Title :
Dual band circular polarized patch antenna using small ferrite disks
Author :
Sigalov, M. ; Shavit, R. ; Kamenetskii, E.O.
Author_Institution :
Electr. & Comput. Eng. Dept., Ben-Gurion Univ. of the Negev, Beer-Sheva, Israel
Abstract :
A novel dual band circular polarization microstrip antenna is presented. The antenna is based on a circular patch antenna and its circular polarization is obtained by taking advantage of the interaction of antenna cavity field with magnetized ferrite disks inserted in the cavity region. The physics of this effect is based on creation of electromagnetic vortices. 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 of the ferrite disks underneath the patch are analyzed. It is shown that the circular polarization can be switched if the polarity of the bias magnetic field is reversed.
Keywords :
ferrite devices; microstrip antennas; antenna cavity field; circular polarization microstrip antenna; circular polarized patch antenna; electromagnetic vortices; magnetized ferrite disks; Dual band; Electromagnetic radiation; Electromagnetic scattering; Electromagnetic wave polarization; Ferrites; Magnetic analysis; Microstrip antennas; Patch antennas; Physics; Scattering parameters; circular polarization; ferrite; microstrip antenna;
Conference_Titel :
Electrical and Electronics Engineers in Israel, 2008. IEEEI 2008. IEEE 25th Convention of
Conference_Location :
Eilat
Print_ISBN :
978-1-4244-2481-8
Electronic_ISBN :
978-1-4244-2482-5
DOI :
10.1109/EEEI.2008.4736584
