Constrained Pareto Optimization of Wide Band and Steerable Concentric Ring Arrays

Multiobjective Optimization Design of Time-Modulated Concentric Circular Ring Arrays

“…To optimize the PSLL of the time-modulated CCRA, and to get the relationship between the PSLL and the PSBL, the multiobjective evolutionary algorithm GDE3 [20] is adopted in this paper. The flowchart of the GDE3 is shown in Figure 2.…”

“…In fact, there are a set of solutions known as Pareto front or nondominated solutions [12][13][14][15][16][17]. Therefore, multiobjective evolutionary algorithms have been employed to solve complicated antenna design problems such as the optimal synthesis of linear arrays, planar arrays, or concentric ring arrays [18][19][20][21][22].…”

Synthesis of Taylor-Like Patterns With Uniformly Excited Multi-Ring Planar Antennas

“…The radiation patterns of non-isotropic elements can be factored into the pattern in the usual way. When synthesizing for a main beam scanned to by setting the phases of elements to (7) the pattern must be calculated using (2) with and replaced by and , respectively, and in (6), should be the position of the th sidelobe maximum in the -cut through .…”

“…In [1], simulated annealing was used to optimize relevant pattern parameters by varying the ring radii; [2] showed how to implement a circular planar version of the density tapering technique ( [4], [5]), array elements being located so that the local average excitation density approximated that of a circular Taylor pattern [6]; while [3] employed genetic algorithms, with or without the help of local optimization procedures, to optimize ring radii, within-ring element spacing, or both. Multi-objective optimization, e.g., to balance beamwidth against maximum sidelobe level (SLL), has been considered by Bianchi et al [7]. For references to the older literature, the above papers may be consulted.…”

Reducing time-delay units through randomly-overlapped subarrays in wideband linear array designs

“…Most of the strategies adopted for the design, such as thinned arrays [1], polyfractal arrays [2] or concentric ring arrays [3], relies on introducing somehow aperiodicity and randomness in the radiating element arrangement and are often supported by stochastic algorithms [4]. The aforementioned methods may produce a sparse array covering electrically-large areas thus avoiding the insurgence of the quantization lobes determined by the periodic element lattice.…”