NDLI: Near field multifocusing on antenna arrays via non-convex optimisation

Content Provider	IET Digital Library
Author	Álvarez, Jana Ayestarán, Rafael G. León, Germán Herrán, Luis F. Arboleya, Ana Fernández, Jesús A. López Heras, Fernando Las
Abstract	An optimisation framework for near field multifocusing on antenna arrays is proposed. Its aim is to obtain the feeding weights that must be applied to the elements of the array so that the antenna focuses on two or more targets simultaneously. The method is based on the definition of a proper cost function, which is minimised using an optimisation algorithm over an equivalent least squares problem. The success of the technique is noted in the fact that different array parameters can be obtained: magnitude and phase of the array elements or only phase synthesis. In order to show the efficiency of the method, several tests are carried out using different arrays and optimisation parameters. The simulation, manufacture and measurement of an 8 × 8 planar array able to focus on two different targets is also performed. Results show how the framework can be applied to general arrays and demanding requirements, so it may be easily extended to different synthesis problems besides multifocusing.
Starting Page	754
Ending Page	764
Page Count	11
ISSN	17518725
Volume Number	8
e-ISSN	17518733
Issue Number	Issue 10, Jul (2014)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-map/8/10
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-map.2013.0563
Journal	IET Microwaves, Antennas & Propagation
Publisher Date	2014-03-17
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Antenna Accessory Antenna Array Antenna Feeds Concave Programming Cost Function Equivalent Least Squares Problem Feeding Weight Focusing Interpolation And Function Approximation Least Squares Approximation Near Field Multifocusing Nonconvex Optimisation Parameter Numerical Analysis Optimisation Framework Optimisation Technique Phase Synthesis Synthesis Problem
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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