Analysis and design of integrated structures of (H)NRD guide and E-plane waveguide based on transverse resonance technique

The present paper treats the analysis and design method of the (H)NRD guide and E-plane rectangular waveguide integrated structures on the basis of th e transverse resonance technique. The analysis is made by assuming a resona nt cavity short-circuited at appropriate reference planes and considering t he cavity as a waveguide discontinuity problem in the transverse direction. The resonant lengths are determined from the transverse equivalent circuit , and the scattering parameters are calculated from the lengths. We analyze (H)NRD discontinuities and design two types of HNRD guide to E-plane waveg uide transitions and a directional coupler composed of HNRD and E-plane wav eguide. The theoretical results are in good agreement with results calculat ed by an EM-simulator.