Study of cluster of hard horns feeding an offset multi-beam reflector antenna for dual band operation at 20/30 GHz

Lindgren, Tore; Soutodeh, O.; Kildal, Per-Simon

doi:10.1109/aps.2004.1332013

Cited by 4 publications

(1 citation statement)

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“…Satellite communications exploit multiple-beam reflector antennas (or, in particular cases, phased arrays [11]) to achieve a continuous coverage over a desired field-of-view on terrestrial surface [10]. Since a different feed is required per each beam, the need to cover all the directions in a determinate angular range is satisfied with a dense cluster of horns [12,13]. A similar multiple horn-fed reflector antenna system is employed in radio-astronomy too [14], where the low power of the typical signals involved requires a large parabolic dish to collect the incoming radiation and focus it in a feed.The feed has a composite geometry, and a certain numbers of horn antennas are placed close each other in the focal point, providing a multi-beam radiation where the beams system covers a wide span of the sky [15].…”

Section: Introductionmentioning

confidence: 99%

An In-Line Coaxial-to-Waveguide Transition for Q-Band Single-Feed-Per-Beam Antenna Systems

et al. 2021

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An in-line transition between a coaxial cable and rectangular waveguide operating in Q-band (33–50 GHz) is presented. The aim of the work is to minimize the modifications in the waveguide to the strictly necessary to overcome the manufacturing issues due to the high frequencies involved. In addition, the transition is compact and it does not increase the space occupation on the transverse section, this suggests its application in horn antennas clusters arrangement. The operating principle consists of both a modal conversion and an impedance matching between the devices. The modal conversion is realized in an intermediate region, where the coaxial penetrates in the waveguide: the device geometry is designed so that the electric field in the transition is a trade-off between the TEM mode of the coaxial and the TE10 of the guide. A shaped waveguide backshort and a reactive air gap in the coaxial cable co-participate to achieve the matching. An optimized Chebyshev stepped transformer completes the transition to fulfil the impedance mismatch with the full waveguide. The design issues and technological aspects are considered. The influences of the feeding pin misalignment, the presence of groove is included in the analysis and these practical aspects are discussed and numerically validated via the scattering parameters analysis of the proposed design. The return loss is higher than 25 dB over the whole Q-band.

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Section: Introductionmentioning

confidence: 99%

An In-Line Coaxial-to-Waveguide Transition for Q-Band Single-Feed-Per-Beam Antenna Systems

et al. 2021

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Numerical investigation on the performance of a septum polarizer by inserting additional stubs for its applications in the CP horn antennas

Chou

Lee

2008

Micro & Optical Tech Letters

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A septum polarizer influenced by inserting short stubs inside the waveguide is studied. Several configurations of stub insertion are investigated to exhibit their physical behaviors. Numerical results show that proper stub insertions may provide additional freedoms to optimally design the polarizer with a better return loss and a flexible phase tuning, which is particularly useful to compensate the deficiency of an imperfect horn antenna to radiate good circularly polarized fields. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 269–273, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23982

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Dual band hard horn for use in cluster-fed multi-beam antennas in Ka-band

Sotoudeh

Kildal

Ingvarson³

et al.

2005 IEEE Antennas and Propagation Society International Symposium

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Study of cluster of hard horns feeding an offset multi-beam reflector antenna for dual band operation at 20/30 GHz

Cited by 4 publications

References 1 publication

An In-Line Coaxial-to-Waveguide Transition for Q-Band Single-Feed-Per-Beam Antenna Systems

An In-Line Coaxial-to-Waveguide Transition for Q-Band Single-Feed-Per-Beam Antenna Systems

Numerical investigation on the performance of a septum polarizer by inserting additional stubs for its applications in the CP horn antennas

Dual band hard horn for use in cluster-fed multi-beam antennas in Ka-band

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