| 摘要 |
PROBLEM TO BE SOLVED: To provide a waveguide directional coupler capable of reducing a price by simplifying structure and reducing the number of components and capable of securing electromagnetic shielding functions of a waveguide part and a dielectric substrate. SOLUTION: The waveguide directional coupler is constituted of a mechanism holding a multilayer dielectric substrate 6 loading an electronic component 6a on its surface, plating a part other than the electronic component loading part with a metal and perforating first conductive through holes 6a, 6b between metal covers 5, 7 on which electromagnetic shielding spaces 5b, 5c, 7b for electromagnetically shielding waveguides 5a, 7a and an electronic component 6c are formed to constitute the waveguide directional coupler by three components. COPYRIGHT: (C)2006,JPO&NCIPI
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