Optimal Synthesis of Phase-Only Reconfigurable Linear Sparse Arrays Having Uniform-Amplitude Excitations

Abstract

Abstract-In a large number of applications, including communications from satellites, an optimal exploitation of the available power is of the outmost importance. As a consequence, isophoric array architectures, i.e., arrays using the same power in all the different entry points and achieving the amplifiers' maximum efficiency, are of great interest. At the same time, the easy reconfigurability of the power patterns results fundamental in order to get a full exploitation of the payload. In this paper, an innovative and deterministic approach is proposed for the optimal synthesis of linear phase-only reconfigurable isophoric sparse arrays able to commute their pattern amongst an arbitrary number of radiation modalities. The introduced perspective leads to an effective solution procedure for the fast design of antennas with high performance, and does not recur to computationally expensive global-optimization techniques. Numerical results concerning applications of actual interest and employing realistic element patterns are provided in support of the given theory.

Circular-Ring Antenna Arrays Being at the Same Time Sparse, Isophoric, and Phase-Only Reconfigurable: Optimal Synthesis via Continuous Aperture Sources

“…2), array-design methods trying to accommodate all constraints of sparsity, isophoricity, and phase-only control started appearing. Nowadays, the only successful techniques seem being the ones introduced in [3] and [10], respectively. In both these contributions, in order to circumvent the high non-linearity of the synthesis problem at hand, the arrays are conceived as the 'discretization' of provably-optimal continuous sources acting at the same time as reference and benchmark.…”

“…The capability of easily reconfiguring the radiation behavior of a direct-radiating array antenna is crucial in several applications, including radar and satellite telecommunications [1][2][3][4][5][6][7][8][9][10][11][12][13][14]. Amongst the different kinds of reconfigurability, a very effective one is undoubtedly represented by phase-only control, as it allows both a simplification of the beam forming network and an increase of the amplifiers' efficiency [1][2][3][4][5][6][7][8][9][10][11].…”

“…Amongst the different kinds of reconfigurability, a very effective one is undoubtedly represented by phase-only control, as it allows both a simplification of the beam forming network and an increase of the amplifiers' efficiency [1][2][3][4][5][6][7][8][9][10][11].…”

Synthesis of Dual Beam Pattern of Planar Array Antenna in a Range of Azimuth Plane Using Evolutionary Algorithm

“…An integrated multifunction/multiband [6] antenna was designed using the stochastic multiphases optimization technique by Azaro et al Morabito et al proposed a technique for optimal synthesis of linear phase-only reconfigurable arrays which are able to commute their pattern among different radiation models. Numerical results of actual interest and its implementation of realistic element patterns are also assessed [7]. Chatterjee et al developed a method based on GSA for finding out optimum sets of 4-bit radial amplitudes and 5-bit phases to generate dual beams such as pencilpencil, pencil-flattop and flattop-flattop of the concentric ring array antenna [8].…”

“…However, generation of cosec 2 beam and pencil beam using a common set of discrete elements amplitudes often faces high side lobe with large ripple problem. Several approaches reported in the literature for generating beam patterns are as follows [1][2][3][4][5][6][7][8][9][10].…”