首页|Fast Broadband Scattering Computation for Finite Periodic Arrays using the Characteristic Basis Function Method and the Best Uniform Rational Approximation
Fast Broadband Scattering Computation for Finite Periodic Arrays using the Characteristic Basis Function Method and the Best Uniform Rational Approximation
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NETL
NSTL
Applied Computational Electromagnetics Soc
In this paper, a hybrid method combiningthe characteristic basis function method (CBFM) and thebest uniform rational approximation (BURA) techniquefor fast wideband radar cross-section (RCS) predictionof finite periodic arrays is proposed. The traditionalCBFM requires reconstructing the reduced matrix ateach frequency point, which is very time-consumingwhen calculating the wideband RCS of the target. Byintroducing the BURA technique, the hybrid method isproposed to efficiently calculate the wideband RCS. Thetarget is first divided into several easily solvable subdomains.Then, the surface integral equation is solved bythe characteristic function method to obtain the equivalentsurface current at the Chebyshev node. Afterwards,the surface current in a desired frequency band is representedby the Chebyshev series. To improve accuracy, theChebyshev series is matched with the Maehly approximation.After obtaining the current coefficients in thewhole bandwidth, the current density at any frequencypoint in the bandwidth can be calculated. Finally, thebroadband electromagnetic scattering characteristics ofthe finite periodic arrays can be obtained.
best uniform rational approximationbroadbandcharacteristic basis function methodMaehly approximation
Fang Li、Hai Rong Zhang、Lin Chen、Xing Wang
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Antenna and RF Specialist Department20th Research Institute of China Electronics Technology Group Corporation, Xi’an, Shaanxi 710068, China
Department of Electrical and Computer EngineeringXi’an, Shaanxi 710071, China
NETL
NSTL
Applied Computational Electromagnetics Soc
