| 摘要 |
PROBLEM TO BE SOLVED: To provide a high-frequency shield circuit structure, capable of decreasing transmission of high frequencies emitted from a high frequency circuit part to outside a high-frequency shielding body. SOLUTION: A circuit substrate 11 is provided on a metallic base plate, and transmission paths 18a, 18b, 18c extended on the circuit substrate 11 and connected to a high frequency circuit part 14 and a low-frequency circuit part 13 are provided on this circuit substrate 11. A ground pattern 15 is provided on the substrate 11, so as to enclose the high frequency circuit part 14, and also a metallic block 16 is provided on this ground pattern 15 so as to enclose spacially the high-frequency circuit part 14. Ingress paths 15a, 15b, 15c for a transmission path eliminating the ground pattern 15 are provided on the substrate 11. Furthermore, cutouts 16a, 16b, 16c for introducing the transmission path are provided in the metallic block 16 on this ingress path. High-frequency ground circuit parts 17a, 17b, 17c, 17d, 17e, 17f connected in terms of high frequency to the transmission path are provided in fully in proximity to the ingress path and also inside and outside the metallic block.
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