Xh. Yang et L. Shafai, CHARACTERISTICS OF APERTURE-COUPLED MICROSTRIP ANTENNAS WITH VARIOUS RADIATING PATCHES AND COUPLING APERTURES, IEEE transactions on antennas and propagation, 43(1), 1995, pp. 72-78
A full wave moment method is applied for the analysis of aperture coup
led microstrip antennas, in which all components of electric and equiv
alent magnetic surface currents are considered, Electric current distr
ibutions on the rectangular patch for different coupling aperture posi
tions are presented with their radiation patterns. Effects of the coup
ling aperture shape and size on the input impedance and radiation perf
ormances are also discussed. As an example of new radiators, slotted p
atches are studied, and it is shown that they can be used to achieve d
ual-frequency operation.