Radiation Analysis of Antenna Around Electrically Large Platform Using Improved MoM-PO Hybrid Method

Ma, Ji; Gong, Shuxi; Jin, Lu; Xu, Yunxue; Jiang, Wen

doi:10.1163/156939311794500241

Cited by 4 publications

(1 citation statement)

References 18 publications

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“…Numerical techniques developed to analyze an open-ended cavity include low-frequency methods, such as the method of moments (MoM) [1,2], finite element method (FEM) [3,4], and finite different time domain (FDTD) [5][6][7], and high-frequency methods, such as geometrical optics (GO) [8,9], geometrical theory of diffraction (GTD) [10], physical optics (PO) [11,12], and the physical theory of diffraction (PTD) [13,14]. Low-frequency methods solve Maxwell's equations with no implicit approximations and are typically limited to objects of small electrical size due to limitations of computation time and system memory.…”

Section: Introductionmentioning

confidence: 99%

Improvement of Iterative Physical Optics Using Previous Information to Guide Initial Guess

Chin¹,

Yeom²,

Kim

et al. 2012

PIER

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Abstract-We propose an improved method of iterative physical optics (IPO) to analyze electromagnetic scattering by open-ended cavities.The traditional IPO method uses a fixed number of iterations; if this number is too small, the accuracy of the estimated monostatic radar cross section (RCS) of open-ended cavities degrades as the incident angle of the incident field increases. The recentlyintroduced adaptive iterative physical optics-change rate (AIPO-CR) method uses a variable number of iterations; compared to the IPO method, it predicts monostatic RCS more accurately, but requires more computation time. In this paper, a new algorithm is devised to improve both the monostatic RCS prediction accuracy of the IPO method, and the computational efficiency of the AIPO-CR method. The proposed method, iterative physical optics-retained previous solution (IPO-RPS), calculates the currents at one incident angle, then reuses them as the initial currents of iterations for the next incident angle. In simulations of the monostatic RCS for various open-ended cavities, the IPO-RPS method was more accurate than the traditional IPO method, and computationally more efficient than both the IPO and AIPO-CR methods.

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