Series single point grounding
When element circuit and signal line is below 1MHz, single point grounding is the best choice. On the condition ofrelative high frequency, line trace's inductance shall increase the resistance of PCB.On the condition of higher frequency, power face and resistance of trace shall not be ignored. If trace 's length equals to or is close to odd times of 1 /4 wavelength, the resistance shall be quite high, and trace or ground leading-in shall like antenna radiating RF energy.
When element circuit and signal line is above 1 MHz, single point grounding shall not be considered. 希望对你有帮助,谢谢!