Design of Subarrayed Linear and Planar Array Antennas With SLL Control Based on an Excitation Matching Approach

Abstract

In this paper, the synthesis of subarrayed antennas with subarrays having different weights and dimensions is considered. The problem is formulated as the definition of the element clustering into spatially contiguous subarrays and the corresponding weights to obtain a pattern with the lowest (i.e., minimum achievable) sidelobe level (SLL). The problem is addressed with an unconstrained approach based on an excitation matching method where the synthesis of subarray weights and sizes is simultaneously carried out. Successively, a hybrid version of such an approach is proposed to directly enforce into the optimization procedure the SLL constraints. A set of representative results concerned with both sum and difference patterns are shown. Furthermore, some comparisons with state-of-the-art hybrid evolutionary-based techniques are reported, as well.

Europe and the Future for WPT : European Contributions to Wireless Power Transfer Technology

“…The optimization of the DoFs of the arrays has been carried out by means of ad-hoc design methodologies. As for clustered arrays, an excitation matching approach based on the Contiguous Partition Method (CPM) [39] has been exploited in order to define the clustering configuration and the sub-array excitations so as to obtain a pattern as close as possible to the one having optimal BCE [36]. The availability of the optimal excitations has enabled, through the CPM, the effective synthesis of very large phased arrays, unfeasible when using classical design methods.…”

On the design of clustered planar phased arrays for wireless power transmission

“…. ; Ng identify the membership of each n-th array element to a q-th cluster (1 q Q) [10,11,12,13]. The degrees-of-freedom of the synthesis problem are the values of the sub-array amplitude coefficients fI q ; q ¼ 1; .…”

“…The array layout is organized in clusters, each one containing several radiating elements, and the control of the excitation amplitudes is carried out at the sub-array level. To properly address such a synthesis problem by defining the layout of the sub-array configuration and the values of the sub-array weights, several approaches based on either global optimization algorithms [7,8], hybrid [9,10,11], or ad-hoc deterministic [12,13] techniques have been proposed. Thanks to its efficiency, the Contiguous Partition Method (CPM) presented in [13] is here properly customized to the design of clustered planar phased arrays providing maximum BCE for WPT applications.…”

Comparison Guidelines and Benchmark Procedure for Sparse Array Synthesis

“…Due to their advantages, several methods have been developed: evolutionary techniques [1][2][3][4], compressive sensing inspired approaches [5][6][7][8], and many others [9][10][11][12][13]. In spite of the importance of the problem, no specific comparison procedures among synthesis methods have been developed up to date.…”