An E-plane ferrite loaded simple waveguide radiator

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...

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Bibliographic Details
Published in:IEEE transactions on antennas and propagation 2003-06, Vol.51 (6), p.1315-1320
Main Authors: Vishvakarma, B.R., Meshram, M.K., Thanoon, W.A.
Format: Article
Language:English
Subjects:
Antennas
Dielectric materials
Dielectrics
Electromagnets
Ferrite
Ferrites
Loaded antennas
Loaded waveguides
Magnetic fields
Microwave devices
Notches
Permeability
Polymers
Radiators
Tensile stress
Waveguides
X-band
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Summary: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/spl deg/, 120/spl deg/, 90/spl deg/, 80/spl deg/, 60/spl deg/ 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.
ISSN:0018-926X
1558-2221
DOI:10.1109/TAP.2003.812191