| 摘要 |
To provide a transmission line capable of absorbing the reflection caused by mismatching between impedances and restraining the attenuation value of a signal. The following wiring patterns are formed out of a connector mounting area in which a connector is mounted: a wiring pattern designed so as to gradually increase the wiring width and the interval between wirings of a wiring portion (B) and gradually decrease the characteristic impedance of the wiring portion (B) and a wiring pattern designed so as to gradually decrease the wiring width and the interval between wirings of the wiring portion (B') and gradually amplify the characteristic impedance of the wiring portion (B').
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