Design of wide-band corrugated conical horns for Cassegrain antennas

Thomas, B.; James, G.L.; Greene, K.J.

doi:10.1109/tap.1986.1143899

Cited by 66 publications

(18 citation statements)

References 7 publications

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“…For a receiver with an isolator at temperature, at its input the system temperature can be expressed as (6) with K a typical receiver noise temperature, K the ambient temperature causing ground radiation, and the cosmic sky noise. The feed will be located inside a Dewar cooled to 15 K which is assumed in (6). For the same reason the ohmic loss in the feed is neglected in this paper, so .…”

Section: B Figure Of Meritmentioning

confidence: 99%

“…In particular, corrugated horns were used to produce very good performance in terms of symmetry of the main lobe and cross polarization. They were and still are popular as feeds for dual reflector antennas, and they can have octave bandwidth [6], [7]. Corrugated horns are expensive and heavy, so simpler dielectric alternatives have been proposed [8].…”

Section: Introductionmentioning

confidence: 99%

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The Eleven Antenna: A Compact Low-Profile Decade Bandwidth Dual Polarized Feed for Reflector Antennas

Olsson

Kildal

Weinreb

2006

IEEE Trans. Antennas Propagat.

117

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Abstract-A novel dual polarized ultrawide-band (UWB) feed with a decade bandwidth is presented for use in both single and dual reflector antennas. The feed has nearly constant beam width and 11 dBi directivity over at least a decade bandwidth. The feed gives an aperture efficiency of the reflector of 66% or better over a decade bandwidth when the subtended angle toward the sub or main reflector is about 53 , and an overall efficiency better than 47% including mismatch. The return loss is better than 5 dB over a decade bandwidth. The calculated results have been verified with measurements on a linearly polarized lab model. The feed has no balun as it is intended to be integrated with an active 180 balun and receiver. The feed is referred to as the Eleven antenna because its basic configuration is two parallel dipoles 0.5 wavelengths apart and because it can be used over more than a decade bandwidth with 11 dBi directivity. We also believe that 11 dB return loss is achievable in the near future.Index Terms-Log-periodic antenna, multifunction, reflector antenna, reflector antenna feed, square kilometer array (SKA), ultrawide-band (UWB).

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Section: B Figure Of Meritmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The Eleven Antenna: A Compact Low-Profile Decade Bandwidth Dual Polarized Feed for Reflector Antennas

Olsson

Kildal

Weinreb

2006

IEEE Trans. Antennas Propagat.

117

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“…1) Region I: For the solution of (1), the MoM is employed. The magnetic surface current density is approximated by linear independent basis functions on on (2) where the are the expansion coefficients for the magnetic surface current density.…”

Section: A Methods Of Momentsmentioning

confidence: 99%

“…The simulation models for numerical horn investigations can be categorized mainly in three types: 1) the aperture is assumed to be terminated in a large waveguide and the radiation pattern is computed by field integration, e.g., [1], [2], and [5]; 2) an infinite screen is assumed to be placed in the aperture plane, e.g., [4], [6], and [7]; and 3) more rigorous analyses reported in [8]- [15], which take the outer horn surface into account. The present paper belongs to category 3).…”

Section: Introductionmentioning

confidence: 99%

Rigorous combined mode-matching integral equation analysis of horn antennas with arbitrary cross section

Bunger

Beyer

Arndt

1999

IEEE Trans. Antennas Propagat.

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A combined rigorous method is presented for the analysis of horn antennas with arbitrary cross section and general outer surface. The horn taper is described by the mode-matching (MM) method where the cross-section eigenvalue problem is solved by a two-dimensional (2-D) finite element (FE) technique. For the exterior horn surface including the radiating aperture, the application of the Kirchhoff-Huygens principle yields two expressions for the admittance matrix which are based on the electric (EFIE) and the magnetic (MFIE) field integral equation, respectively. The equations are solved numerically by the method of moments (MoM). For the preferred EFIE formulation, the eigenvectors of the last waveguide taper section and RWG functions for triangular patches are utilized as basis-functions for the magnetic or electric surface current densities, respectively. The presented method is verified by available reference values or measurements for a waveguide radiator with a peripheral choke, a conical and a rectangular horn. Its flexibility is demonstrated at the example of a conical ridged waveguide horn.Index Terms-Horn antennas, integral equation methods, method of moments, mode-matching methods.

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“…Mentzer & Peters, 1976;Thomas, James, & Greene, 1986;Olver, 1992). FromFigure 3, where the horn axis is collinear with the z 0 -axis, it follows that:E feed = E y 0 a y 0 = (E θ 0 sin φ 0 + E φ 0 cos φ 0 )a y 0 ,(1)Downloaded by [Uppsala universitetsbibliotek] at 02:21 07 October 2014 Synthesis of Single Shaped Reflectors…”

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confidence: 99%

A Tutorial on the Synthesis of Single Shaped Reflectors in C, KU, and KA Bands

Landeros‐Ayala¹,

Neri²,

Sámano³

2006

Electromagnetics

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The technique of shaping the surface of satellite parabolic reflectors, illuminated by a single feed, in order to obtain a determined shaped contoured radiation pattern, with corresponding weight and cost savings, has become an important engineering problem. At present there are many sophisticated synthesis methods that have evolved in the last ten years, but a tutorial on the basics of the design procedure is missing in the literature. This article proposes a didactical sequence of the basic mathematical reasoning and the application of one of the most popular methods used for this purpose, clarifying several considerations which are very important but are usually omitted in textbooks or in previous technical papers on the subject, thus providing a time-saving reference tool for antenna designers who are unfamiliar with the topic. Typical surface deformation data for shaped reflectors at C, Ku, and Ka bands are given as a guideline for a set of different footprints, and a comprehensive and userfriendly program available from a web link is also provided for other geometries.

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Design of wide-band corrugated conical horns for Cassegrain antennas

Cited by 66 publications

References 7 publications

The Eleven Antenna: A Compact Low-Profile Decade Bandwidth Dual Polarized Feed for Reflector Antennas

The Eleven Antenna: A Compact Low-Profile Decade Bandwidth Dual Polarized Feed for Reflector Antennas

Rigorous combined mode-matching integral equation analysis of horn antennas with arbitrary cross section

A Tutorial on the Synthesis of Single Shaped Reflectors in C, KU, and KA Bands

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