So. Park et Ca. Balanis, ANALYTICAL EVALUATION OF THE ASYMPTOTIC IMPEDANCE MATRIX OF ASYMMETRIC GAP DISCONTINUITIES, IEEE transactions on microwave theory and techniques, 46(8), 1998, pp. 1132-1140
New analytical formulas have been developed for evaluating the asympto
tic impedance matrix of an asymmetric gap by using the integral transf
orm method. Application of the newly derived formulas shows a dramatic
improvement of the computation time for evaluating the overall impeda
nce-matrix elements for the symmetric and asymmetric gaps while retain
ing the accuracy.