Efficient computation of surface fields excited on a dielectric-coated circular cylinder
Date
2000-10Source Title
IEEE Transactions on Antennas and Propagation
Print ISSN
0018-926X
Publisher
IEEE
Volume
48
Issue
10
Pages
1507 - 1516
Language
English
Type
ArticleItem Usage Stats
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Abstract
An efficient method to evaluate the surface fields
excited on an electrically large dielectric-coated circular cylinder
is presented. The efficiency of the method results from the circumferentially
propagating representation of the Green’s function as
well as its efficient numerical evaluation along a steepest descent
path. The circumferentially propagating series representation of
the appropriate Green’s function is obtained from its radially
propagating counterpart via Watson’s transformation and then
the path of integration is deformed to the steepest descent path
on which the integrand decays most rapidly. Numerical results
are presented that indicate that the representations obtained here
are very efficient and valid even for arbitrary small separations
of the source and field points. This work is especially useful in the
moment-method analysis of conformal microstrip antennas where
the mutual coupling effects are important.
Keywords
Conformal AntennasElectromagnetic coupling
Green function
Microstrip arrays
Antenna arrays
Circular waveguides
Computational methods
Dielectric waveguides
Electromagnetic wave propagation
Green's function
Integration
Mathematical transformations
Method of moments
Microstrip antennas
Conformal antennas
Electromagnetic coupling
Microstrip arrays
Surface fields
Watsons transformation
Electromagnetic fields