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This thesis presents two approaches to increase the antenna's
bandwidth of conventional aperture coupled microstrip antenna
structure. One is coplanar patches with one aperture coupled to
microstrip line, the other is series-fed patches with apertures
coupled to microstrip line. Both configurations are analyzed
using an integral equation technique solved in spectral domain
with the Galerkin method of moments. New numerically efficient
methods are applied to expediate the calculations. Experimental
data are shown to be in be good agreement with the calculated
results. The effect of varying geometric parameters of the
structure is discussed with a goal of designing wide-band
microstrip antenna.
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