Patent ID: 6172648
Filing Date: 2001-01-09
Classification: H01P

Abstract:
A directional coupler comprising:first and second dielectric guides, each comprising a dielectric strip provided between two conductive plates and using opposing faces of said two conductive plates as electrode faces, the conductive plates having end faces substantially perpendicular to the opposing faces,said first and second dielectric guides being arranged with end faces of their respective conductive plates touching or not touching, the dielectric strips of said first and second dielectric guides being provided substantially parallel to each other in the vicinity of the end faces of said conductive plates, and a groove being provided in an end face of said conductive plates of one of said first and second dielectric guides, the groove having a short-circuiting face in a position at a distance from said electrode faces of approximately an integral multiple of half the wavelength of a propagated wave.