NDLI: Element phase centre and orientation compensation in conformal arrays during continuous deformations based on spherical mode expansion

Content Provider	IET Digital Library
Author	Wu, Tao Cui, Xiao Zhang, Pengyu Zhang, Jing Yang, Liuxi
Abstract	Radiation field of conformal arrays can be obtained by simulation computation. There must be a trade-off between computation accuracy and complexity. With respect to applications where both high efficiency or even real-time applications and accuracy are required, such as adaptive beamformers together with time-varying array structures due to deformations or vibrations, more effective methodologies have to be employed for precise mainlobe direction maintenance and rigorous suppression of existing interferences. A method combining spherical mode expansion, rotation and translation of spherical waves, spatial displacement phase compensation, and approximations of constant element radiation patterns in local coordinate systems is proposed here, featuring one-time numerical effort for isolated element radiation patterns, fast coupling matrix calculation based on updated array configuration, and analytical radiation field expressions with limited eigenmode expansion coefficients storage requirements. Adaptive beamformers are utilised to validate the effects of remaining approximations including constant element patterns in local coordinate systems and constant mutual coupling matrix, proving the proposed method has the potential for aircraft-borne conformal antenna array radiation field analysis where deformations and vibrations occur continuously.
Starting Page	1817
Ending Page	1824
Page Count	8
ISSN	17518725
Volume Number	14
e-ISSN	17518733
Issue Number	Issue 14, Nov (2020)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-map/14/14
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-map.2020.0113
Journal	IET Microwaves, Antennas & Propagation
Publisher Date	2020-09-02
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Adaptive Beamformer Aircraft-borne Conformal Antenna Array Analytical Radiation Field Expressions Antenna Array Antenna Radiation Pattern Antenna Theory Approximation Theory Array Configuration Array Signal Processing Compensation Conformal Antenna Constant Element Pattern Constant Element Radiation Pattern Constant Mutual Coupling Matrix Continuous Deformations Coupling Matrix Calculation Displacement Phase Compensation Eigen Values And Eigen Function Eigenmode Expansion Coefficient Storage Requirements Electromagnetic Compatibility Element Phase Centre Interference Interference Suppression Interpolation And Function Approximation Isolated Element Radiation Pattern Linear Algebra Local Coordinate System Mainlobe Direction Maintenance Matrix Algebra Numerical Analysis One-time Numerical Effort Orientation Compensation Radiation Field Analysis Real Time Application Signal Processing And Detection Spatial Displacement Phase Compensation Spherical Mode Expansion Spherical Wave Time-varying Array Structure
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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