Abstruct-A method to determine the admittance and resonant length of an inclined slot in the narrow wall of a fectangular waveguide is presented. An expression for the admittance of the slot is. derived nsing an angolar spectrum of plane.waves and the discontinuity in modal current. When the depth of cut in the top and bottom wall is assumed to be zero, the expression for resonant conductance found by the present method is exactly the sameas that obtained by Stevenson. Comparison' between the theoretical and experimental results on the variatiun of resonant conductance with angle of inclination of Slots for a fixed depth of cot of 3.5 mm is presented. ' <

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