A Generalized Hybrid Approach for the Synthesis of Uniform Amplitude Pencil Beam Ring-Arrays

Abstract

A generalized hybrid algorithm for the synthesis of uniform amplitude ring-arrays is introduced. The method exploits the analytical properties of the field radiated by a circular array in order to get advantages from the use of convex programming techniques. The method, aimed to the synthesis of circularly symmetric patterns, is very flexible and allows the use of different kind of feeds as well as stepped excitations. The synthesis procedure is demonstrated in the case of high-directivity pencil beam patterns

A Lexicographic Approach for Multi-Objective Optimization in Antenna Array Design

“…As a matter of fact, this assumption is in line with the other methodologies proposed in the recent literature for the synthesis of satellite sparse arrays employing elements with dimensions similar to those considered in this work [9,18,24,25]. Turning to the application of the proposed QLWS, as usual, we have to set the list of priorities among the targets.…”

“…5). Such an architecture is well suited for spatial applications [9]. Apart from an inessential multiplicative constant, the expression of the pattern of an isophoric sparse circular array consisting of concentric rings is [15]:…”

“…A number of methods [9,18] have recently been proposed for the synthesis of such kind of isophoric sparse arrays. All of them aim at finding the optimal number of rings N R , set of radii r m , number of feeds per ring n m and relative orientation ψ m (m ∈ {1 .…”

“…The proposed approach extends the core idea of a "switching" GCF presented in [9]: in that case the GCF was built to deal with two concurrent targets, namely, the Side Lobe Level (SLL) and the directivity of a sparse array. In particular, maximization of the directivity was performed once the SLL constraint was met.…”

A Compressive-Sensing Inspired Alternate Projection Algorithm for Sparse Array Synthesis

“…For future developments, we are working towards the application of the presented technique also for planar arrays, in particular to sparse circular arrays [30,31] and to plane wave generators [32,33]. We are also looking for the introduction of additional system constraints in the synthesis method, like a minimum or maximum inter-element distance, or a particular dynamic of the excitations.…”