Analytical evaluation of asymptotic part of the Green's function, in product with piece-wise sinusoidal, entire domain, and travelling wave mode basis functions, is presented. The Sommerfeld type double integral in spectral domain is solved and reduced into a single integral in spatial domain with very short integration range. The derived results lead to develop a computational efficiency improved code, which has been found 27 times faster than the earlier validated common method of moments code.Index Terms-Lens antennas, microstrip antennas, stacked microstrip antennas.
In [1], two errors occurred in (30); in the second p function of the first integral and the integration limit of the second integral. The correct equation appears as follows:
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