A New Comb Circular Polarizer Suitable for Millimeter-Band Application

Eom, Soon-Young; Korchemkin, Yu. B.

doi:10.4218/etrij.06.0206.0110

Cited by 20 publications

(11 citation statements)

References 4 publications

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“…The feed is composed of the two half-housings of a circular waveguide and two comb plates which are inserted between them. Because of its simplicity, absence of any tuning elements, and effective performance, it is suitable for many applications in the millimeter-band [11]. The electrical performance of the comb polarizer is optimized by varying the radius of the circular waveguide as well as the number and geometric parameters of the comb cogs.…”

Section: A Radiating Active Channel Modulementioning

confidence: 99%

Design and Test of a Mobile Antenna System With Tri-Band Operation for Broadband Satellite Communications and DBS Reception

Eom

Jung

Jeon

et al. 2007

IEEE Trans. Antennas Propagat.

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Abstract-The tri-band mobile antenna system for broadband multimedia services in the Ka/K-band and a simultaneous direct broadcast service in the Ku-band has been developed. The radiating part of the antenna consists of a shaped dual reflector system and a tri-band feed of circular polarization. The low-profile offset main reflector has an aperture size of 60 cm 20 cm; therefore, a fan beam is formed which is sharp in azimuth and wide in elevation. The feed system contains a protruding dielectric rod for Ka/K-band and 2 2 active phased array. The latter provides the beam for Ku-band along with four fast electrical beams for stable satellite tracking. The new tracking algorithm based on a fusion technique involving various sensors and fast electrical beams has also been introduced. The antenna system was mounted on a large ship and a test car, and successfully operated via Koreasat-3.Index Terms-Dual reflector, mobile antenna system, satellite tracking, tri-band feed.

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Section: A Radiating Active Channel Modulementioning

confidence: 99%

Design and Test of a Mobile Antenna System With Tri-Band Operation for Broadband Satellite Communications and DBS Reception

Eom

Jung

Jeon

et al. 2007

IEEE Trans. Antennas Propagat.

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“…They are widely used in satellite communication systems [1,2] for the polarization characteristics conversion of the received signals and the CMB polarization experiments [3,4] to understand the very early Universe. There are many kinds of circular polarizers such as the metal septum polarizers [5][6][7] and the dielectric septum ones [8,9].…”

Section: Introductionmentioning

confidence: 99%

Design and cold test of an S-band waveguide dual circular polarizer

Pei

Hou

et al. 2017

Radiat Detect Technol Methods

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Purpose An S-band dual circular polarizer has been designed and tested with low power in the paper, which will be applied in a spherical cavity pulse compressor. It converts the TE 10 mode in rectangular waveguide into two polarization degenerated TE 11 modes in cylindrical waveguide. Methods The general scattering matrix of the dual circular polarizer has been deduced based on the properties of the passive microwave network, which is suitable for the usual 3 dB coupler, as well as the left/right hand circular polarizer. Based on the 3D code software CST, the dual circular polarizer was numerically simulated. Then, two prototypes have been manufactured and tested with the vector network analyzer (VNA). Results The simulation results show that the magnitudes and phase difference of the two TE 11 modes are − 3.0103/− 3.0104 dB and 89.79 degrees, respectively. The cold test results show good agreement with CST simulation. Conclusion The method of analyzing the relationship between the voltage standing wave ratio (VSWR) and the errors of the magnitudes and phase difference of the two TE 11 modes was given, which can be used to qualitatively analyze the properties of the circular polarizer. The S-band waveguide dual circular polarizer can be applied in the pulse compressor, phase shifter or other frequency bands.

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“…To excite dual polarized waves in a circular or square waveguide, various structures have been employed such as the orthomode transducer [8], the septum polarizer [9], quadruple ridges [10], the shorted ring patch [11], and dual coaxial probes [12]. The quadrature phase can be realized by using either a waveguide polarizer [13] or a quadrature hybrid coupler.…”

Section: Introductionmentioning

confidence: 99%

A New Dual Circularly Polarized Feed Employing a Dielectric Cylinder-Loaded Circular Waveguide Open End Fed by Crossed Dipoles

Bang¹,

Choi²,

Noh³

et al. 2016

International Journal of Antennas and Propagation

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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.

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A New Comb Circular Polarizer Suitable for Millimeter-Band Application

Cited by 20 publications

References 4 publications

Design and Test of a Mobile Antenna System With Tri-Band Operation for Broadband Satellite Communications and DBS Reception

Design and Test of a Mobile Antenna System With Tri-Band Operation for Broadband Satellite Communications and DBS Reception

Design and cold test of an S-band waveguide dual circular polarizer

A New Dual Circularly Polarized Feed Employing a Dielectric Cylinder-Loaded Circular Waveguide Open End Fed by Crossed Dipoles

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