| 摘要 |
PROBLEM TO BE SOLVED: To uniformize a ground pressure of a ground pattern of a printed circuit board and of a chassis in contact with the ground pattern and to conduct stable grounding even against a rapid environmental change and vibration or the like. SOLUTION: The converter is integrated with a printed circuit board 8. A plurality of high frequency function circuits are mounted on the printed circuit board 8, the respective high frequency circuits are separated by a ground pattern. In a fixed structure of ribs 10 corresponding to the ground patterns are provided to a chassis 9 and a placing plate 14 located on the rear side of the printed circuit board 8, a rubber board 13 with elasticity is interposed between the printed circuit board 8 and the placing plate 14.
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