MOMENT METHOD ANALYSIS OF LINEARLY TAPERED SLOT ANTENNAS

An accurate Method of Moments (MoM) model is developed and implemented for the analysis of the linearly tapered slot antenna (LTSA). The mod el employs an unequal size reactangular sectioning for conducting part s of the antenna. Piecewise sinusoidal basis functions are used for th e expansion of conductor current. The effect of the dielectric is inco rporated in the model by using equivalent volume polarization current density and solving the equivalent problem in free space. The feed sec tion of the antenna including the microstripline is handled rigorously in the MoM model by including slotline short-circuit and microstripli ne currents among the unknowns. Comparison with measurements is made t o demonstrate the validity of the model for both the air case and the dielectric case. Numerical results for the effect of the dielectric pe rmittivity are presented. (C) 1994 John Wiley & Sons, Inc.