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Sidelobe Levels (sidelobe + level)

Distribution by Scientific Domains
Engineering100%

Selected Abstracts

Reduction of sidelobe levels in interrupted phased array antennas by means of a genetic algorithm,

INTERNATIONAL JOURNAL OF RF AND MICROWAVE COMPUTER-AIDED ENGINEERING, Issue 2 2007
David A. Tonn
Abstract Interruptions in the regular lattice of a phased array antenna can lead to elevated sidelobe levels in the resulting antenna pattern. A method for reducing the sidelobe level in such an array is presented, based on the use of a genetic algorithm that modifies the element weights in the array. Results are presented for both scanned and unscanned arrays. © 2007 Wiley Periodicals, Inc. Int J RF and Microwave CAE, 2007. [source]

Efficient high gain with low sidelobe level antenna structures using circular array of square parasitic patches on a superstrate layer

MICROWAVE AND OPTICAL TECHNOLOGY LETTERS, Issue 12 2010
R. K. Gupta
Abstract This article proposes efficient high gain with low sidelobe level (SLL) antenna structures using circular array of square parasitic patches (CASPPs) for wireless applications. The antenna structure consists of a microstrip antenna that feeds a CASPP fabricated on a low cost FR4 superstrate. The patches on superstrate are suspended in air at about ,o/2. The structure with 19-element CASPPs is designed, fabricated, and tested. The measured VSWR is <2 over 5.725,5.875 GHz frequency band. The antenna with a single square patch provides a gain of 12.6 dB; whereas, the antenna with 19-element CASPPs provides a gain of 18.3 dB with 93.4% efficiency, SLL of ,26.1 dB, and front to back lobe ratio of >20 dB. Antenna with CASPPs on finite ground requires 25% less ground plane size as compared to planar array. The proposed structure can be packaged inside an application platform. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52:2812,2817, 2010; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.25613 [source]

Reduction of sidelobe levels in interrupted phased array antennas by means of a genetic algorithm,

INTERNATIONAL JOURNAL OF RF AND MICROWAVE COMPUTER-AIDED ENGINEERING, Issue 2 2007
David A. Tonn
Abstract Interruptions in the regular lattice of a phased array antenna can lead to elevated sidelobe levels in the resulting antenna pattern. A method for reducing the sidelobe level in such an array is presented, based on the use of a genetic algorithm that modifies the element weights in the array. Results are presented for both scanned and unscanned arrays. © 2007 Wiley Periodicals, Inc. Int J RF and Microwave CAE, 2007. [source]

Genetic algorithm optimization of a multisectional corrugated conical horn antenna

MICROWAVE AND OPTICAL TECHNOLOGY LETTERS, Issue 5 2003
Dooyeong Yang
Abstract This paper presents the design of a wideband corrugated multisectional conical horn using a genetic algorithm (GA). The GA optimizes the length, flare angle, and first slot depth of each section of the horn in order to match the admittance, reduce the voltage standing wave ratio (VSWR) of the horn, and generate the desired pattern. A VSWR of less than 1.6 is obtained over the frequency range 11,18 GHz. The optimized multisectional conical horn antenna has four sections, is less than 7, long, and has very low sidelobe levels. The ratio between ratio between the co-polarization and the cross-polarization patterns is greater than 60 dB. © 2003 Wiley Periodicals, Inc. Microwave Opt Technol Lett 38: 352,356, 2003; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.11058 [source]