%0 Journal Article 
%A Mosig, Juan Ramón
%A Álvarez Melcón , Alejandro
%T Green’s functions in lossy layered media: integration along the imaginary axis and asymptotic behavior
%D 2003
%@ 0018-926X
%U http://hdl.handle.net/10317/642
%X This paper presents an efficient technique for evaluating
Green’s functions associated to layered media, when formulated
as Sommerfeld integrals in the space domain. The key
step in the formulation is that Sommerfeld integrals are computed
choosing a suitable integration path which is closed through the
imaginary axis of the complex spectral plane. It is shown that with
this original choice of the integration contour, the numerical effort
usually involved in the evaluation of Sommerfeld integrals can be
greatly reduced, specially when large source-observer distances are
involved. One asset of this technique is that it can be easily incorporated
into integral equation based CAD packages for the efficient
analysis of complex printed microwave circuit and antennas. In addition,
the theoretical developments needed to set up the numerical
algorithm throw a new light on the asymptotic behavior of the layered
media Green’s functions for large source-observer distances.
%K Teoría de la Señal y las Comunicaciones
%K Comportamiento asintótico
%K Ecuaciones integrales
%K Funciones Green
%K Circuitos impresos
%K Antenas
%K Asymptotic behavior
%K Integral equation (IE)
%K Circuit board
%K Antennas
%K Green's functions
%~ GOEDOC, SUB GOETTINGEN