A Hybrid Efficient Iterative ACA-PO and Chebyshev Approximation Technique for Fast Radiation Analysis Over a Broad Frequency Band.

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Bibliographic Details
Title:	A Hybrid Efficient Iterative ACA-PO and Chebyshev Approximation Technique for Fast Radiation Analysis Over a Broad Frequency Band.
Authors:	Wu, Junjun¹ wu18792802634@outlook.com
Source:	Applied Computational Electromagnetics Society Journal. Feb2026, Vol. 41 Issue 2, p137-143. 7p.
Subjects:	Chebyshev approximation, Physical optics, Approximation error, Boundary element methods, Electromagnetic radiation, Iterative methods (Mathematics)
Abstract:	In this paper, a novel approach integrated efficient iterative adaptive cross approximation-physical optics (EI-ACA-PO) and Chebyshev approximation technique (CAT) is proposed to efficiently calculate the broadband solution of antenna placed on electrically large platforms. The adaptive cross-approximation (ACA) method is employed to compress the self-impedance matrix of the Method of Moments (MoM) region, and the interaction matrices between the MoM and physical optics (PO) regions. By introducing CAT technology, the iterative hybrid method is capable of efficiently calculating the wideband results. First, the outer surface is divided into two regions. Then, the integral equation is solved by the EI-ACA-PO method to obtain the induced current at the Chebyshev nodes. Afterwards, the current in a desired frequency band is represented by the Chebyshev series. To improve accuracy, the Chebyshev series is matched with the Maehly approximation. The current at any frequency point in the bandwidth can be calculated. Finally, the broadband electromagnetic radiation characteristics can be obtained. [ABSTRACT FROM AUTHOR]
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Database:	Engineering Source

Description
Abstract:	In this paper, a novel approach integrated efficient iterative adaptive cross approximation-physical optics (EI-ACA-PO) and Chebyshev approximation technique (CAT) is proposed to efficiently calculate the broadband solution of antenna placed on electrically large platforms. The adaptive cross-approximation (ACA) method is employed to compress the self-impedance matrix of the Method of Moments (MoM) region, and the interaction matrices between the MoM and physical optics (PO) regions. By introducing CAT technology, the iterative hybrid method is capable of efficiently calculating the wideband results. First, the outer surface is divided into two regions. Then, the integral equation is solved by the EI-ACA-PO method to obtain the induced current at the Chebyshev nodes. Afterwards, the current in a desired frequency band is represented by the Chebyshev series. To improve accuracy, the Chebyshev series is matched with the Maehly approximation. The current at any frequency point in the bandwidth can be calculated. Finally, the broadband electromagnetic radiation characteristics can be obtained. [ABSTRACT FROM AUTHOR]
ISSN:	10544887
DOI:	10.13052/2026.ACES.J.410204