Cross polarization in dual reflector antennas--A PO and PTD analysis

Skyttemyr, S.A.

doi:10.1109/tap.1986.1143906

Cited by 10 publications

(3 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…From the above two paragraphs, it is clear that nas, for example, the one in the work by Bj$ntegaard and Pettersen [1983] (see also Skyttemyr [1986]). The computer program has later been modified to analyze a three-reflector system.…”

Section: G(0) = Cos" (0/2) [ Cos 4• S + Sin 4• •B ]mentioning

confidence: 97%

Diffraction analysis of a proposed dual‐reflector feed for the spherical reflector antenna of the Arecibo Observatory

Kildal¹,

Skyttemyr²

1989

Radio Science

View full text Add to dashboard Cite

A proposed dual‐reflector feed for the spherical reflector antenna in Arecibo is presented. This is analyzed over a large frequency range: at the lower frequencies by physical optics (PO) integration, and at the higher ones by a geometrical optic (GO) ray tracing technique described in another work. The latter calculations are extended with the transition region theory (TRT) to include edge diffraction. The results clearly demonstrate the usefulness of the time efficient TRT method. However, they also show that PO integration is important, as this has detected an underillumination of the central region of the aperture. This effect is related to a similar problem with the line feeds, but can in the present case be reduced by moving the subreflectors away from the paraxial focus.

show abstract

Section: G(0) = Cos" (0/2) [ Cos 4• S + Sin 4• •B ]mentioning

confidence: 97%

Diffraction analysis of a proposed dual‐reflector feed for the spherical reflector antenna of the Arecibo Observatory

Kildal¹,

Skyttemyr²

1989

Radio Science

View full text Add to dashboard Cite

show abstract

“…Geometrical optics (GO) ray-tracing methods incorporating aperture field integration (AFI) or diffraction approaches, such as GO + AFI [6,7] and geometrical theory of diffraction [8], are attractive in analysing electrically large reflectors because of the high calculation efficiency, however, bearing limited accuracy. On the other hand, direct integration (DI) methods, such as physical optics (PO) [9,10], can offer more accurate results in high-frequency analysis of reflectors, but with much more computation costs. As a consequence, the accelerating techniques for PO have been intensively studied, and several fast PO treatments have been developed [11][12][13][14][15] as well as hybrid approaches [16,17].…”

Section: Introductionmentioning

confidence: 99%

Reflector antenna analysis method using Poynting vector tracing between virtual apertures

Bai

Jin

et al. 2015

IET Microwaves, Antennas & Propagation

View full text Add to dashboard Cite

In this study, a highly efficient calculation method for analysing electrically large reflector antennas is presented. This method utilises fast Fourier transform enhanced direct integration to calculate beam propagation between parallel virtual apertures, and a novel Poynting vector tracing technique is introduced to treat wave reflections by arbitrary curved surface. Two virtual apertures are set perpendicular to the incident and reflected optical paths. As the centres of the virtual aperture planes coincide with the reflector surface, it makes the ray‐tracing paths between the virtual apertures along with the reflector as short as possible. Owing to these innovative treatments, this method offers a high calculation accuracy comparable with classic physical optics (PO), but with much higher efficiency. By performing numerical comparisons with method of moments, PO algorithm implemented with commercial software FEKO and general reflector antenna software package, the advantages of the proposed method are presented in this study. The method proves to be applicable for the analysis of electrically large reflector antennas.

show abstract

“…The fields, radiated by the fringe currents, can be found by subtracting of uniform part from the exact solution. The method is widely used in the literature for investigation of the scattering problems [5][6][7][8]. Using the uniform fringe fields instead of the non-uniform version is more reliable.…”

Section: Introductionmentioning

confidence: 99%