are the vector mode functions of LSEX and LSEy modes, respectively. The antenna current and the aperture field expressed by Eqs. (1) and (2) are substituted in the integral equations which satisfy boundary conditions on the aperture and the antenna surface. Applying the Galerkin's method, one can obtain a (K+L + 2) x (K+L + 2) matrix equation involving unknown lk and V, which can be easily solved numerically. Driving delta gap voltage is assumed at* = 0 and (b-w)!2 <y< (b+w)!2.
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