| 摘要 |
PROBLEM TO BE SOLVED: To provide a circuit board capable of suppressing transmission losses caused by passage of a high frequency signal through a waveguide and performing high-speed large-capacity information transmission, producible with a high yield rate at low cost, and suitable for mass production. SOLUTION: This circuit board 1a is provided with a dielectric substrate 4 on whose one surface an element 2 and a micro strip line 3 to be connected to this element 2 are wired, and on whose the other surface a ground pattern 5 having a first slot hole 6 is provided, and a waveguide 7 connected to the other surface of this dielectric substrate 4. Inside the waveguide 7, the circuit board has a metal plate 8 provided with a second slot hole 10 formed at a position corresponding to the first slot 6 with a cavity 9 between. COPYRIGHT: (C)2006,JPO&NCIPI
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