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- Title
A New Dual Circularly Polarized Feed Employing a Dielectric Cylinder-Loaded Circular Waveguide Open End Fed by Crossed Dipoles.
- Authors
Bang, Jae-Hoon; Choi, Soon-Woo; Noh, Jae-Woo; Lim, Joo-Young; Kim, Dong-Hyun; Kim, Dae-Oh; Ahn, Bierng-Chearl
- Abstract
This paper presents a new dual circularly polarized feed that provides good axial ratio over wide angles and low cross-polarized radiation in backward direction. A circular waveguide open end is fed with two orthogonally polarized waves in phase quadrature by a pair of printed crossed dipoles and a compact connectorized quadrature hybrid coupler. The waveguide aperture is loaded with a dielectric cylinder to reduce the cross-polarization beyond 90 degrees off the boresight. The fabricated feed has, at 5.5 GHz, 6.33-dBic copolarized gain, 3-dB beamwidth of 106°, 10-dB beamwidth of 195°, 3-dB axial ratio beamwidth of 215°, maximum cross-polarized gain of −21.4 dBic, and 27-dB port isolation. The reflection coefficient of the feed is less than −10 dB at 4.99–6.09 GHz.
- Subjects
CYLINDER (Shapes); DIELECTRIC devices; CIRCULAR waveguides; MAGNETIC dipoles; POLARIZATION (Electricity)
- Publication
International Journal of Antennas & Propagation, 2016, p1
- ISSN
1687-5869
- Publication type
Article
- DOI
10.1155/2016/7570316