A Framework for Array Shape Reconstruction Through Mutual Coupling
Open Access
- 27 July 2021
- journal article
- research article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Microwave Theory and Techniques
- Vol. 69 (10), 4422-4436
- https://doi.org/10.1109/tmtt.2021.3097729
Abstract
Flexible phased arrays potentially enable diverse applications not permitted by rigid systems; however, they introduce ambiguity in antenna element positions. If this position ambiguity can be overcome, flexible arrays can perform the full suite of array functions: beam steering, wavefront engineering, and beam focusing. Furthermore, shape reconstructions of arrays can be used for applications beyond beamforming. We propose a framework to reconstruct the shape of a flexible array that only uses mutual coupling measurements and does not require additional sensors or functionalities in the system. We discuss the approach, a two-step algorithm, which is highly modular and can be implemented in a variety of phased array systems. To demonstrate the accuracy of the approach, we present results from two passive 2.5-GHz phased array setups using dipole and patch antennas, as well as a 10-GHz (active) integrated circuit flexible phased array, and demonstrate the accuracy of the approach in this system. In all cases, the algorithm reconstructs the antenna shape accurately, with average position errors of approximately 6% of the wavelength. This article can serve as the beginning of the broad study of shape reconstruction algorithms and their applications.Keywords
Funding Information
- Caltech Space Solar Power Project
- Caltech Electrical Engineering Fellowship
This publication has 24 references indexed in Scilit:
- Pattern recovering of conformal antenna array for strongly deformed surfacesPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2017
- Euclidean Distance Matrices: Essential theory, algorithms, and applicationsIEEE Signal Processing Magazine, 2015
- Conformal array pattern synthesis on a curved surface with quadratic function using adaptive genetic algorithmPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2013
- Mutual-coupling based phased-array calibration: A robust and versatile approachPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2013
- A 77-GHz Phased-Array Transceiver With On-Chip Antennas in Silicon: Transmitter and Local LO-Path Phase ShiftingIEEE Journal of Solid-State Circuits, 2006
- Mutual coupling-based calibration of phased array antennasPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2002
- Iterative least-squares synthesis methods for conformal array antennas with optimized polarization and frequency propertiesIEEE Transactions on Antennas and Propagation, 1997
- FOPAIR: a focused array imaging radar for ocean remote sensingIEEE Transactions on Geoscience and Remote Sensing, 1995
- The flared slot: A moderately directive flush-mounted broad-band antennaIEEE Transactions on Antennas and Propagation, 1960
- A wide-band transverse-slot flush-mounted arrayIEEE Transactions on Antennas and Propagation, 1960