| 摘要 |
A receiving device in which the shielding performance is improved to solve a pulling problem in a receiving device of a direct conversion system is provided. <??>The receiving device includes: a substrate on which an amplifier 30 that amplifies high frequency input signals, a filter 34 that passes only intended signals and removes unintended signals by tuning the amplified high frequency input signals and a direct conversion unit 36 that converts and detects directly the high frequency input signal from the filter; a first high-frequency shielding portion 90 fixed to a substrate 20 and which stands at the boundary between the filter and the other units for preventing radiation of the high frequency electro-magnetic wave that is induced from the filter to the space; and a second high-frequency shielding portion 60 provided facing and close to the filter surrounded by the first high-frequency shielding portion 90 and which prevents radiation of high frequency electro-magnetic waves induced from the filter to the space, together with the first high-frequency shielding portion 90. <IMAGE> |
