Spectral domain moment method analysis of slot antennas with parasitic elements

Previously, work has been done on mutual impedance between arbitrarily positioned slots which must be aligned parallel to an axis. This analysis is extended to multiple slots which may be aligned either parallel or perpendicular to an axis and which may be positioned arbitrarily with respect to each other. This type of analysis is useful for determining the mutual impedance between slot antenna elements that are intended to receive different polarizations of incoming radiation. Such geometries may be encountered in polarimetric systems as well as high frequency quasi-optical receivers that utilize different polarizations for the RF and LO signals. We consider right angle elements only as parasitics for impedance tuning and present theoretical and experimental impedance data, and theoretical radiation pattern data.