Analysis of a strip loaded resonant longitudinal slot in the broad wall of a rectangular waveguide

A longitudinal slot at the centre of the broad wall of a rectangular waveguide in the presence of one or two vertical strips has been analysed. The combination is excited by the dominant TE₀₁ mode, and the slot radiates externally. The effect of finite thickness of the waveguide walls has been taken care of by treating the slot as a stub waveguide. The coupled integral equations are solved using Galerkin´s technique. The resultant coefficients are used to compute the dominant mode scattering parameters and hence the equivalent T-networks. The possibility of obtaining a resonant condition for the radiating centred slot-strip combination has been established. Design data derived in this study eliminates the need to gather initial input data experimentally