Beamforming Through Array Thinning

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Tohidi, Ehsan | 2013

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 44613 (05)
University: Sharif University of Technology
Department: Electrical Engineering
Advisor(s): Nayebi, Mohammad Mahdi
Abstract:
Modern communication and space systems such as satellite communication devices, radars, SAR and radio astronomy interferometers are realized with large antenna arrays since this kind of radiating systems are able to generate radiation patterns with high directivity and resolution. In such a framework, conventional arrays with uniform inter-element spacing could be not satisfactory in terms of costs and dimensions. An interesting alternative is to reduce the array elements obtaining the so called ‘ thinned arrays’. Large thinned arrays have been exploited because of their advantages in terms of weight,consumption, hardware complexity, and cost over the filled counterparts.Unfortunately, thinning arrays reduces the control of the peak sidelobelevel (PSL) synthesized pattern. Up till now,different techniques such as statistically density taper, global optimization methods, iterative approaches and dynamic programming have been used to arrive at thinned arrays. In this thesis, many different novel methods to design thinned arrays with desired patterns are proposed
Keywords:
Phased Array Radars ; Array Thinning ; Beamforming ; Sidelobe level ; Beam Width

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