Closed-form solutions for analysis of cylindrically conformal microstrip antennas with arbitrary radii

An efficient and accurate closed-form solution, based on the spectral-domain method of moments (MoM), is presented to analyze the characteristics of cylindrically conformal microstrip antennas with arbitrary radii. First, an algorithm that combines the recursive and the uniform asymptotic expansion...

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Veröffentlicht in:IEEE transactions on antennas and propagation Jg. 53; H. 1; S. 518 - 525
Hauptverfasser: He, Mang, Xu, Xiaowen
Format: Journal Article
Sprache:Englisch
Veröffentlicht: New York IEEE 01.01.2005
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Schlagworte:
Approximation methods
Closed forms
Closed-form solution
Computational efficiency
conformal microstrip antennas (CMSAs)
Dielectrics
generalized pencil-of-function (GPOF) method
Green's function methods
Green's functions
Integral equations
Integrals
method of moments (MoM)
Microstrip antennas
Moment methods
Nonlinear equations
Partitioning algorithms
Sommerfeld identity
Studies
ISSN:0018-926X, 1558-2221
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Zusammenfassung:An efficient and accurate closed-form solution, based on the spectral-domain method of moments (MoM), is presented to analyze the characteristics of cylindrically conformal microstrip antennas with arbitrary radii. First, an algorithm that combines the recursive and the uniform asymptotic expansion method in different regions is developed to calculate the spectral-domain Green's functions for arbitrary dielectric coated cylinders accurately. Next, the integrands of the spectral integrals involved in MoM equation are partitioned into two parts, i.e., the fast oscillatory, slowly convergent part and the well-behaved part. Consequently, all of the integrals in MoM analysis can be categorized into two types. Through the Sommerfeld identity and its extension, these integrals are cast into closed-forms by using the nonlinear approximation method (generalized pencil-of-function method). In this method, any time-consuming numerical integration procedure is eliminated, which improves the computational efficiency drastically. Compared with the results from published references, the validity and accuracy of the method are demonstrated.
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ISSN:0018-926X
1558-2221
DOI:10.1109/TAP.2004.838772