Design of steerable concentric rings array for low side lobe level
نویسندگان
چکیده
منابع مشابه
Design of Steerable Linear and Planar Array Geometry with Non-uniform Spacing for Side-Lobe Reduction
In this paper, we present a noble pattern synthesis method of linear and planar array antennas, with non-uniform spacing, for simultaneous reduction of their side-lobe level and pattern distortion during beam steering. In the case of linear array, the Gauss-Newton method is applied to adjust the positions of elements, providing an optimal linear array in the sense of side-lobe level and pattern...
متن کاملSide Lobe Reduction of a Concentric Circular Antenna Array using Genetic Algorithm
A concentric circular antenna array (CCAA) consists of elements positioned on the periphery of imaginary circles on a plane having a common centre and different radii. The simplest way to feed the elements of such an array is to use uniform excitation. However, with a non-uniform excitation profile, considerable reduction of the side lobe level (SLL) may be achieved at the cost of the added com...
متن کاملHigh-gain Low Side Lobe Level Fabry Perot Cavity Antenna with Feed Patch Array
In this paper, a high gain, low side lobe level Fabry Perot Cavity antenna with feed patch array is proposed. The antenna structure consists of a microstrip antenna array, which is parasitically coupled with an array of square parasitic patches fabricated on a FR4 superstrate. The patches are fabricated at the bottom of superstrate and suspended in air with the help of dielectric rods at 0.5λ0 ...
متن کاملتحلیل آرایه های موجبری شکافدار مسطح به منظور طراحی با سطح گلبرگ فرعی بسیار پایین analysis of planar slotted-waveguide arrays for very low sidelobe level(vlsl) design
یک شکاف باریک در دیواره پهن موجبر مستطیلی به کمک روش ممان تحلیل شده است . در این روش اثر القای مجدد روی دیواره ها و ضخامت دیواره موجبر لحاظ شده است . در واقع روش ممان برای حل یک جفت معادله انتگرالی- حاصل از شرایط مرزی و بکمک توابع گرین - بکار رفته است . در نتیجه حل این دو معادله، مولفه مماسی میدان الکتریکی روی سطوح بالایی و پایینی شکاف بدست آمده است . این میدان ها با یک سری تابع سینوسی بسط شده ...
15 صفحه اولReduction of Side Lobe Level of Thinned Phased Array Antenna using Genetic Algorithm
Thinned phased array antenna is useful for Radar and satellite communications. Main drawback of phased array antenna is generation of side lobes and grating lobes when the beam is titled from broadside direction toward the end-fire direction. This paper reports the optimization of thinned phased array antenna using genetic algorithm (GA). By varying the tilt angle form broadside direction main ...
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ژورنال
عنوان ژورنال: Scientia Iranica
سال: 2012
ISSN: 1026-3098
DOI: 10.1016/j.scient.2011.08.028