Optimum beam scanning in offset single and dual reflector antennas

Krichevsky, V.; DiFonzo, D.

doi:10.1109/tap.1985.1143547

Cited by 8 publications

(3 citation statements)

References 18 publications

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“…Here, to compare the scanning performance of the shaped reflector with that of the paraboloid, the initial feed positions are selected as the optimum feed position (OFP) [11] of the paraboloid (the initial reflector). However, it should be noted that the space between these initial feeds can be decreased suitably to reduce the total size of the feed array.…”

Section: Design Proceduresmentioning

confidence: 99%

A Novel Shaping Design Technique for the Reflector in Hybrid Antennas

Liu¹,

Jiao²,

Zhang³

2005

Journal of Electromagnetic Waves and Applications

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A new reflector shaping technique to improve the beam scanning capability of hybrid antennas (i.e., a reflector system illuminated by a phased array) is presented. Errors between the desired scan directions and the outgoing rays' directions in the scanning range are minimized by adjusting the reflector shape. This technique can be used to decrease the active element number of the feed array during the antenna scans, or reduce the gain loss caused by beam scanning when the number of active elements is given. An offset reflector antenna system is designed and analyzed, through which the validity of the technique is demonstrated.

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Section: Design Proceduresmentioning

confidence: 99%

A Novel Shaping Design Technique for the Reflector in Hybrid Antennas

Liu¹,

Jiao²,

Zhang³

2005

Journal of Electromagnetic Waves and Applications

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“…Various solutions have been proposed in the past to improve the scanning performance of quasi-optical systems either using Gaussian horn feeds combined with shaped reflector or lens antennas [19]− [22] (with most of the cases over sizing the radiating aperture) and/or determining an optimum focal surface [23], [24], where the array elements are placed [17]; or by using array clusters of feeds to achieve a conjugate field match condition with the focal plane field [25]− [27]. This work considers a relatively simple FPA architecture based on a lens array.…”

Section: Introductionmentioning

confidence: 99%

Coherent Fourier Optics Model for the Synthesis of Large Format Lens-Based Focal Plane Arrays

Dabironezare

Carluccio

Freni

et al. 2021

IEEE Trans. Antennas Propagat.

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Future sub-millimetre imagers are being developed with large focal plane arrays (FPAs) of lenses to increase the field of view (FoV) and the imaging speed. A full-wave electromagnetic analysis of such arrays is numerically cumbersome and timeconsuming. This paper presents a spectral technique based on Fourier Optics combined with Geometrical Optics for analysing, in reception, lens based FPAs with wide FoVs. The technique provides a numerically efficient methodology to derive the Plane Wave Spectrum (PWS) of a secondary Quasi Optical component. This PWS is used to calculate the power received by an antenna or absorber placed at the focal region of a lens. The method is applied to maximize the scanning performance of imagers with monolithically integrated lens feeds without employing an optimization algorithm. The derived PWS can be directly used to define the lens and feed properties. The synthesized FPA achieved scan losses much lower than the ones predicted by standard formulas for horn based FPAs. In particular, a FPA with scan loss below while scanning up to ± .° (~± beam-widths) is presented with directivity of complying with the needs for future sub-millimetre imagers. The technique is validated via a Physical Optics code with excellent agreement.

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“…The optimization metric or cost function is a weighted sum of the errors between the directions of reflected rays and the corresponding scan directions. The unit vector of a ray leaving the kth feed position ) , , ( (corresponding to the kth scan angle and selected as the optimum feed position [6]) to the interpolation point…”

Section: Design Proceduresmentioning

confidence: 99%

A Novel Reflector Shaping Technique for Hybrid Antennas

Liu

Jiao

et al.

2005 Asia-Pacific Microwave Conference Proceedings

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A new reflector shaping technique to improve the beam scanning capability of hybrid antennas (i.e. a reflector system illuminated by a phased array) is presented. Errors between the desired scan directions and the outgoing rays' directions in the scanning range are minimized by adjusting the reflector shape. This technique can be used to decrease the active element number of the feed array during the antenna scans, or reduce the gain loss caused by beam scanning when the number of active elements is given. An offset reflector antenna system is designed and analyzed, through which the validity of the technique given in this paper is demonstrated.

show abstract

Optimum beam scanning in offset single and dual reflector antennas

Cited by 8 publications

References 18 publications

A Novel Shaping Design Technique for the Reflector in Hybrid Antennas

A Novel Shaping Design Technique for the Reflector in Hybrid Antennas

Coherent Fourier Optics Model for the Synthesis of Large Format Lens-Based Focal Plane Arrays

A Novel Reflector Shaping Technique for Hybrid Antennas

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