| 摘要 |
The present solution relates to a PCB and a mobile communications device thereof. The PCB is provided with a power wire, a ground wire, a clock signal wire, an FM signal wire and the like. The wiring width of the FM signal wire is equal to the width of a radio frequency 50-ohm impedance wire. The ground wire for signal shielding is arranged around the FM signal wire. The minimum value of the distance between the FM signal wire and the ground wire is two times the wiring width of the FM signal wire. In the solution, the wiring width of an FM signal wire is set to be equal to the width of a radio frequency 50-ohm impedance wire, and meanwhile a ground wire is arranged around the FM signal wire for signal shielding, so that electromagnetic interference brought by devices and wires around the FM signal wire is reduced, transmission line crosstalk is reduced, and the anti-interference performance of the FM signal wire is improved, thereby ensuring the stability of frequency modulation (FM) functions in mobile communications products or other electronic products. |
