MUTUAL COUPLING BETWEEN WAVE-GUIDE-FED LONGITUDINAL BROAD WALL SLOTS RADIATING BETWEEN BAFFLES

This paper presents an analysis of the mutual coupling effect in waveg uide-fed longitudinal slots radiating between baffles. The region exte rior to the waveguide-fed slots is assumed to be cylindrical, a parall el plate waveguide opening into an outer half-space region bounded by an infinite ground plane with an aperture in the middle. The field pro blem in the exterior region is solved in spectral domain. Mutual admit tance characteristics are presented for a range of values of the physi cal parameters, including the special case of an infinitely long paral lel plate waveguide. These results should be useful in the analysis an d synthesis of slot arrays for applications such as dual polarization systems and for suppressing the off-axis grating lobes resulting from alternating slot offsets.