JELE_V7_N1_RP1 J. Ravindranadh A. Sudhakar K. Padmaraju Journal on Electronics Engineering 2249 – 0760 7 1 1 8 Array Antenna, Stair-Step, Ramp, Amplitude Control, Beam Shaping For the generation of narrow beams and other desired beam shapes, the antenna arrays are widely used. Mostly in high resolution radars and for point to point communication, narrow beams are used. There will be one major lobe followed by a number of minor lobes for any pattern produced by array antenna. For the purpose of covering wide angular regions, flat or sector beams are used. For ground mapping and also for airport surveillance, cosecant beams are used. The width of main beam becomes very small and is mostly a useful point to point communication, when the selected antenna array is sufficiently large enough. Generally, stair-step patterns are employed to identify when there is more than one target moving with both different altitudes and angular regions. However, it is required to design the sufficiently large enough arrays to produce optimized patterns. In this paper, Fourier transform technique is extended to design an aperture distribution for the generation of stair-step patterns and also an amplitude control technique for the generation of sector beams to produce the ramp patterns. September – November 2016 Copyright © 2016 i-manager publications. All rights reserved. i-manager Publications http://www.imanagerpublications.com/Article.aspx?ArticleId=8272