TY - JOUR
T1 - Balanced Electric-Magnetic Absorber Green's Function Method for MoM Matrix Thinning and Conditioning
AU - Shay, Naor R.
AU - Weile, Daniel S.
AU - Kastner, Raphael
N1 - Publisher Copyright:
© 1963-2012 IEEE.
PY - 2018/6
Y1 - 2018/6
N2 - A balanced (Weston-type) absorber, characterized by both electric and magnetic loss mechanisms, can be placed within the null field inside the equivalent surface currents replacing a perfectly conducting or homogeneous scatterer. The absorber, referred to as the filler, substantially reduces the interactions between pairs of opposing basis/testing functions. The resultant moment matrix, formulated with the filler Green's function (GF), is thinned accordingly. Moreover, most annulled elements need not be computed at all, thereby reducing substantially the matrix fill time. The lossy nature of GF also serves to eliminate spurious internal resonances and thus makes the electric or magnetic field integral equation matrix to be well conditioned without resorting to a combined field integral equation.
AB - A balanced (Weston-type) absorber, characterized by both electric and magnetic loss mechanisms, can be placed within the null field inside the equivalent surface currents replacing a perfectly conducting or homogeneous scatterer. The absorber, referred to as the filler, substantially reduces the interactions between pairs of opposing basis/testing functions. The resultant moment matrix, formulated with the filler Green's function (GF), is thinned accordingly. Moreover, most annulled elements need not be computed at all, thereby reducing substantially the matrix fill time. The lossy nature of GF also serves to eliminate spurious internal resonances and thus makes the electric or magnetic field integral equation matrix to be well conditioned without resorting to a combined field integral equation.
KW - Electric field integral equation (EFIE)
KW - ill- and well-conditioning
KW - method of moments (MoM)
KW - sparse matrices
UR - http://www.scopus.com/inward/record.url?scp=85045300449&partnerID=8YFLogxK
U2 - 10.1109/TAP.2018.2826359
DO - 10.1109/TAP.2018.2826359
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AN - SCOPUS:85045300449
SN - 0018-926X
VL - 66
SP - 2996
EP - 3001
JO - IEEE Transactions on Antennas and Propagation
JF - IEEE Transactions on Antennas and Propagation
IS - 6
ER -