The transverse resonance technique for analysis of O-shaped slot resonators with mutual coupling in microstrip line earthing layer

The scattering matrix calculation algorithm of three mutually coupled O-shaped slot resonators in microstrip line earthing layer was composed using transverse resonance technique. In the modified algorithm the “electrical” and “magnetic” boundary problems are solved for the structure as a whole while taking into account the longitudinal harmonics of current density in microstrip line and high-order modes of the O-shaped waveguide which describes the field in the slot resonator´s aperture. It admits the high-precision calculation of the structure´s scattering matrix elements with mutual influence of the slot resonators taken into account.