An improved main reflector design for compact range applications

Pistorius, C.W.I.; Burnside, W. D.

doi:10.1109/tap.1987.1144101

Cited by 31 publications

(17 citation statements)

References 4 publications

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“…In practice, the whole projected aperture of the CR reflector can be selected to be rectangle, convex or concave [22]. In this paper, a circular, a square and a serrated-edge aperture are put forward to be as examples.…”

Section: Comparison Of the Whole Aperture Shapementioning

confidence: 99%

Compact Range Performance Evaluation Using Aperture Near-Field Angular Spectrums

Quan

2013

IEEE Trans. Antennas Propagat.

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For a compact range (CR), the near-field angular spectrum can be obtained by making an inverse Fourier transform of its aperture spatial near field. The characteristics of the aperture design have been carried by the aperture near-field angular spectrum. The direct wave and edge-diffracted waves from the aperture can be separated and distinguished clearly in the angular domain. Therefore, the CR performance can be evaluated and improved accordingly. In this paper, based on the aperture field convolution method and plane wave spectrum (PWS) theory, near-field angular spectrums for different apertures have been computed. The general criteria for the CR aperture design have been discussed. The selections of the whole aperture shape, the serration height, the serration base length, the serration number, and the serration shape (including isosceles and right-angled triangles) have been compared. At last, the near fields of an optimized serrated-edge aperture and an original circular aperture in different transverse planes have been computed and compared. The width and height of the apertures are all 30 wavelengths in free space. In order to suppress the sidelobes, a Chebyshev window with dB sidelobes has been adopted in the spatial-angular transform.Index Terms-Aperture antennas, compact range (CR), convolution, near fields, plane wave spectrum (PWS), spectrum analysis.

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Section: Comparison Of the Whole Aperture Shapementioning

confidence: 99%

Compact Range Performance Evaluation Using Aperture Near-Field Angular Spectrums

Quan

2013

IEEE Trans. Antennas Propagat.

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“…The spreading factor is determined in part by the shape of the edge contour. Pistorius and Burnside [4] have shown that by using concave edge contours, the diffracted fields from a compact range reflector can be reduced. The same principle is applied here to reduce the diffracted fields from the edges in the aperture of the horn antenna, thereby lowering the sidelobe level.…”

Section: Gtd Analysis Of a Horn With Curved Edgesmentioning

confidence: 99%

Horn antenna with suppressed sidelobe level

Odendaal

Pistorius

1991

Micro & Optical Tech Letters

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“…Let p i ( @ ) be the junction contour of the reflector in ( Next, a blended rolled edge for a concave rim reflector [7,8] (see Appendix) is designed. The focal length of the reflector is 7.25 feet, and the reflector is offset in the y direction by 8.5 feet; i.e., zaVg = 0 and yavo = 8.5'.…”

Section: Blended Rolled Edges For 3-d Reflectorsmentioning

confidence: 99%

“…A blended rolled edge as shown in Figure 3, is generated by blending the elliptical rolled edge with an extension of the paraboloid. The equation of the blended rolled edge [7,8] in the ( p , z ) coordinate system is then given by 16) into (13) and (14), one obtains 3). Substituting (ll), (12), (15 and Again the total surface is given in two parts.…”

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confidence: 99%