Patent ID: 6707349
Filing Date: 2004-03-16
Classification: H01P

Abstract:
A directional coupler for a microwave coupling cavity installed on an outer side of a coupling hole on a waveguide, the directional coupler comprising:a first carrier, whose one side surface has a metal transmission line having a coupling section, a first output section extending from one end of the coupling section to the edge of the first carrier, and a second output section extending from the other end of the coupling section to the edge of the first carrier, and whose other surface has a predetermined coupling area located at the central position of the coupling section and overlapped with the coupling hole of the waveguide; a second carrier, which is overlapped and combined with the first carrier and covers the transmission line; a metal layer, which covers the surfaces of the combined first carrier and second carrier except for the coupling area; and a connecting means, which fixes the combined first carrier and the second carrier to one side of the waveguide.