Impedance properties of a longitudinal slot antenna in the broad face of a rectangular waveguide

The impedance properties of a waveguide longitudinal slot antenna of arbitrary length and offset in guide walls of finite thickness are investigated. These properties are obtained by treating the slot discontinuity as an electromagnetic boundary value problem and the resulting pair of coupled integral equations are solved by numerical techniques. Results are given for slots having lengths from
0.35\lambda
to
1.7\lambda
and are in good agreement with experimental results.