Proceedings ArticleDOI
Electronic scanning parabolic-reflector excited by a cluster-feed array
W. Gregorwich,L.K. Lam,R.A. Hall,R.B. Ward +3 more
- Vol. 1, pp 249-257
TLDR
In this paper, a dual-polarized, electronically scanned parabolic reflector is described that tracks and receives telemetry data from two missiles simultaneously, and beam steering is accomplished by means of a prime focus cluster-feed that is programmed using phased array processing techniques.Abstract:
A dual-polarized, electronically scanned parabolic-reflector is described that tracks and receive telemetry data from two missiles simultaneously. Beam steering is accomplished by means of a prime focus cluster-feed that is programmed using phased array processing techniques. The feed provides variable beamwidth and beamshape. Missile tracking is accomplished by employing a unique algorithm that maximizes signal-to-noise in the direction of the target. >read more
Citations
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Patent
Antenna receiving system and method
TL;DR: In this article, an antenna receiving system having an array of dual sense antenna elements for receiving both right and left hand circular polarized radiation from each of one or more targets, a right hand and a left hand polarized radiation attenuator and a right hands polarized radiation phase shifter connected to each antenna element, a direction finding computer for controlling the attenuators and phase shifters connected to the antenna element and for processing outputs from selected pairs of phase shiftters in order to find a direction to each of the one or multiple targets, and a beam forming computer for control the atten
Proceedings ArticleDOI
A multibeam phased array for aircraft
W. Gregorwich,R.A. Hall +1 more
TL;DR: A "smart skins" multibeam phased array designed for quick installation on and removal from a nondedicated C-130 aircraft that scans electronically agile beams to simultaneously track four reentry vehicles in three-dimensional space.
References
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Journal ArticleDOI
Directivity optimization of a reflector antenna with cluster feeds: A closed-form solution
TL;DR: In this paper, a closed-form solution for the cluster excitation to achieve the optimum directivity was presented for an offset 108 λ parabolic reflector antenna scanning 10 beamwidths, and the optimum-directivity achieved by a 19-element (seven-element) cluster is 12 dB (8 dB) higher than that of a single element.
Array Feed Synthesis for Correction of Reflector Distortion and Vernier Beamsteering
S. J. Blank,William A. Imbriale +1 more
TL;DR: In this article, an algorithmic procedure for the synthesis of planar array feeds for paraboloidal reflectors is described which simultaneously provides electronic correction of systematic reflector surface distortions as well as a Vernier electronic beamsteering capability.
Journal ArticleDOI
Array feed synthesis for correction of reflector distortion and vernier beamsteering
S. J. Blank,William A. Imbriale +1 more
TL;DR: An algorithmic procedure is described for the synthesis of a planar-array to provide simultaneously electronic correction of systematic reflector surface distortions as well as a vernier electronic beamsteering capability to provide significant on-axis gain restoration.
Journal ArticleDOI
Secondary pattern and focal region distribution of reflector antennas under wide-angle scanning
C. Hung,Raj Mittra +1 more
TL;DR: In this article, a Fourier-Bessel series technique was developed to investigate the far-field pattern and focal region distribution of reflector antennas under wide-angle scanning, where the current on the reflector surface is first expanded in terms of elementary sinusoidal functions via the well established fast Fourier transform (FFT) algorithm and the surface integration involved in physical optics integration is then carried out analytically.
Journal ArticleDOI
Analysis of a cluster feed for the Arecibo trireflector system using forward ray tracing and aperture integration
TL;DR: In this paper, a cluster feed for the Gregorian dual-reflector feed of the Arecibo radio telescope is studied by forward ray tracing from each individual feed horn via the three reflectors to the aperture.