| 摘要 |
<p>PURPOSE:To provide a multilayer printed circuit board which can avoid signal leakage and influence of external electric wave and at the same time reduce device cost and miniaturize the device in a multilayer printed circuit board which is used for a microwave communication device etc. CONSTITUTION:A high-frequency signal which is input to and output from connectors 1 and 2 and amplifier circuits 7a and 7b is transmitted through a signal transmission line layer 5 provided inside a multilayer printed circuit board 3. An internal ground layer 9 and a ground layer 11 are provided on the upper and lower sides of the signal transmission layer 5 through an insulation material 13.</p> |
