| 摘要 |
PROBLEM TO BE SOLVED: To provide an electrical circuit constitution arranged in a casing, which does not require individual shieldings. SOLUTION: A sealed circuit carrier 1 is provided with large-area layers 3 and 4 for absorbing electrical fluctuations on both surfaces thereof for protecting a high-frequency circuit, which is disposed in a casing 6 and is actuated at a frequency which is higher than one gigahertz and lower than 100 gigahertz, from an internal electromagnetic wave perturbation radiation. The layer 4 is formed of a material for absorbing electrical fluctuations, such as a silicone of a mean conductivity, and is arranged below the carrier 1. The carrier 1 having circuit constituent parts 5 is sealed with a dielectric material, such as a silicone sealing compound or an epoxy resin. The layer 3 is formed of a sealing compound for absorbing the electrical fluctuations, such as a silicone filled with iron powder and is disposed above the sealed circuit carriers 1 and 2. |
