An E-plane ferrite loaded simple waveguide radiator

Author

Vishvakarma, Babau R. ; Meshram, Manoj K. ; Thanoon, W.A.

Author_Institution

Dept. of Electron. Eng., Banaras Hindu Univ., Varanasi, India

Volume

51

Issue

6

fYear

2003

fDate

6/1/2003 12:00:00 AM

Firstpage

1315

Lastpage

1320

Abstract

Experimental investigations were conducted to examine the effect of dielectric loading on a ferrite loaded waveguide radiator (notch antenna). The antenna was made by symmetrically tapering an X-band waveguide. A cylindrical ferrite post was disposed at the apex of the notch and it was biased with a dc magnetic field. The antenna was tested for several notch angles namely 140°, 120°, 90°, 80°, 60° while ferrite was loaded with several dielectric sleeves, such as wood, polymer, pyrex. The dielectric loading with high permittivity material is found to give better radiation and scanning characteristics. The radial thickness of the dielectric ring is observed to affect the radiation.

Keywords

antenna radiation patterns; antenna testing; dielectric-loaded antennas; dielectric-loaded waveguides; ferrite-loaded waveguides; permittivity measurement; polymers; scanning antennas; waveguide antennas; wood; E-plane; X-band waveguide; antenna testing; cylindrical ferrite post; dc magnetic field bias; dielectric loading; dielectric ring; dielectric sleeves; ferrite loaded waveguide radiator; high permittivity material; notch angles; notch antenna; polymer; pyrex; radial thickness; radiation characteristics; scanning characteristics; symmetric tapering; wood; Dielectric materials; Electromagnets; Ferrites; Loaded antennas; Loaded waveguides; Magnetic fields; Microwave devices; Permeability; Polymers; Tensile stress;

fLanguage

English

Journal_Title

Antennas and Propagation, IEEE Transactions on

Publisher

ieee

ISSN

0018-926X

Type

jour

DOI

10.1109/TAP.2003.812191

Filename

1208751