| 摘要 |
A microwave directional coupler comprises a dielectric coupler board, elongate metallic strip conductors deposited on front and back surfaces of the board and having respective central portions electrically broadside coupled with each other through the board, and respective right and left hand lead portions terminating in ports at the bottom of the board. Metallic ground plane regions cooperate with those strip conductors to form corresponding microwave transmission lines comprising respective signal conductors provided by said strip conductors and respective grounded conductors provided by said regions. The ground plane regions are in the form of expanses of metallic layers deposited on the same surfaces of the board as are such strip conductors. Ground plane regions on opposite sides of the board are electrically connected by plated-through holes passing through the board. The coupler board is vertical and stands on a dielectric connector board having metallic strips thereon for connecting the strip conductors to external circuit elements.
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