Journal ArticleDOI
Far-Field Pattern of a Focal-Plane Array-Lens Antenna at Millimeter Wavelengths
Z. L. Sun,W. B. Dou +1 more
TLDR
In this article, an analysis of the far field pattern of a focal plane array in the case of two different lenses, a coma-free lens and a hyperbolic lens, and their comparison, are presented.Abstract:
In this paper an analysis of the far-field pattern of a focal-plane array in the case of two different lenses, a coma-free lens and a hyperbolic lens, and their comparison, are presented. Ray tracing and aperture integration are used. The calculated field pattern at W band is presented. The focal-plane elements are assumed to be corrugated horn. The f / D of the lens is 1.3. The coma-free lens is designed by step integration. The calculation results show that the coma-free lens is superior to the hyperbolic lens in the imaging performance. The coma-free lens can contain more pixels under the condition that the beam size and beam quality are almost constant over the range of angles scanned and the differences among beams gain less 1.8 dB. The aperture efficiency and directivity are also presented.read more
Citations
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Near-field analysis of a thick lens and horn combination: Theory and measurements
TL;DR: In this article, the accuracy of the Gaussian beam and thin lens approximation was studied in the case of a corrugated horn and a thick Teflon lens (focal length to lens diameter ratio f/D=1.2) combination at 87 GHz.
Journal ArticleDOI
Large aperture low aberration aspheric dielectric lens antenna for w-band quasi- optics
TL;DR: In this paper, an advanced aspheric and asymmetric large aperture dielectric lens antenna is proposed for high resolution at W-band frequency for millimeter wave quasi-optics application.
Proceedings ArticleDOI
Recent developments in Fresnel zone plate antennas at microwave/millimeter wave
TL;DR: The phase-correcting FZP antenna is a stepped planar lens usually made from low-loss material such as polystyrene, polyethylene, polycarbonate, ceramics or semiconductors as mentioned in this paper.
Journal ArticleDOI
Millimeter-wave imaging with slab focusing lens made of electromagnetic-induction materials
TL;DR: A slab focusing lens in this work has been designed, which consists of electromagnetic-induction materials (cage-shaped granules of conductor materials) and polymethyl methacrylate (PMMA) materials, and the experimental results show good feasibility of the compound lens in MMW imaging.
Dissertation
Millimeter-Wave Band Pass Distributed Amplifier for Low-Cost Active Multi-Beam Antennas
TL;DR: In this article, an integrated active Rotman lens architecture is proposed as an ultimate solution to combine the unique properties of a rotman lens with the superiority of CMOS technology for fabrication of cost effective integrated mmW systems.
References
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Book
Antennas and Radiowave Propagation
TL;DR: In this article, Antennas and radiowave propagation, Antenna and Radial Wave Propagation (RWP) propagation and Antenna deployment, antenna deployment, and antenna deployment are discussed.
Journal ArticleDOI
Focal plane imaging systems for millimeter wavelengths
TL;DR: In this article, the authors discuss critical aspects of imaging system design and describe several different imaging systems employing focal plane array receivers operating in the 3mm-2mm wavelength range, including a near-focus system for identification of plastic materials concealed underneath clothing.
Journal ArticleDOI
The diagonal horn as a sub-millimeter wave antenna
Joakim Johansson,N.D. Whyborn +1 more
TL;DR: In this paper, the far-field radiation pattern of a 4*4 diagonal horn array, measured at 100 GHz, was calculated by aperture integration, and the results indicated that the fraction of the power radiated into the fundamental Gaussian mode is about 84%.
Near-field analysis of a thick lens and horn combination: Theory and measurements
TL;DR: In this article, the accuracy of the Gaussian beam and thin lens approximation was studied in the case of a corrugated horn and a thick Teflon lens (focal length to lens diameter ratio f/D=1.2) combination at 87 GHz.
Journal ArticleDOI
Near-field analysis of a thick lens and horn combination: theory and measurements
TL;DR: In this paper, the accuracy of the Gaussian beam and thin lens approximation was studied in the case of a corrugated horn and a thick Teflon lens (focal length to lens diameter ratio f/D=1.2) combination at 87 GHz.