Beam shaping using nonlinear phase distribution in a uniformly spaced array

Demonstration of a Shaped Beam Reflectarray Using Aperture-Coupled Delay Lines for LMDS Central Station Antenna

“…An approximate phase distribution that will be used as starting point is obtained by combining two linear phase distributions corresponding to the azimuth and elevation patterns. The one-dimensional phase distributions for a sector and cosecant squared are obtained independently using an analytic phase-only synthesis technique, as described in [16]. The 2-D phase distribution obtained by combining the previous phases is used as starting point in a two-dimensional pattern synthesis based on the Intersection Approach technique described in [17].…”

Phase-Only and Amplitude-Phase Only Synthesis of Dual-Beam Pattern Linear Antenna Arrays Using Floating-Point Genetic Algorithms

“…The generation of multiple radiation patterns by a single antenna array with prefixed or common amplitude distribution greatly simplifies the hardware implementation of the feed network, since it is technically easier to design a feed network if the element excitations corresponding to different patterns differ only in phase than if they also differ in amplitude. Several methods of generating phase-only multiple pattern antenna arrays have been described [1][2][3][4][5][6][7].…”

Generation of Ramp Pattern using Modified Differential Evolution algorithm

“…Many of the antenna array pattern synthesis techniques can be found in the literature for the generation of shaped beam radiation patterns [6]- [7]. G. S. N. Raju, A. Sudhakar et al, [8]- [9] has been showed that generation of optimized ramp type of radiation patterns from an antenna array pattern synthesis.…”