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PCB design high-frequency PCB board wiring considerations
2021-09-20
View:53
Author:Kavie

1) Reasonably choose the number of layers
When wiring high-frequency PCB boards in PCB design, use the middle inner plane as the power and ground layer, which can play a shielding role, effectively reducing parasitic inductance, shortening the length of signal lines, and reducing cross-interference between signals. In general Below, the noise of the four-layer board is 20dB lower than that of the two-layer board.

PCB board

  2) Wiring method
   When wiring high-frequency PCB boards in PCB design, the wiring must be turned at an angle of 45°, which can reduce the emission of high-frequency signals and mutual coupling.
  3) Cable length
   When wiring high-frequency PCB boards in PCB design, the shorter the trace length, the better, and the shorter the parallel distance between the two lines, the better.
  4) Number of vias
   When routing high-frequency PCB boards in PCB design, the less the number of vias, the better.
  5) Interlayer wiring direction
   When wiring high-frequency PCB boards in PCB design, the wiring direction between layers should be vertical, that is, the top layer is the horizontal direction and the bottom layer is the vertical direction, which can reduce the interference between signals.
  6) Copper coating
  When wiring high frequency PCB boards in PCB design, increasing the grounding copper can reduce the interference between signals.
  7) Cover land
   When wiring high-frequency PCB boards in PCB design, the important signal lines are packaged, which can significantly improve the anti-interference ability of the signal. Of course, the interference source can also be packaged to prevent interference with other signals.
  8) Signal line
   When wiring high-frequency PCB boards in PCB design, the signal wiring cannot be looped, and it needs to be wired in a daisy chain manner.
  9) Decoupling capacitor
   When routing high frequency PCB boards in PCB design, connect decoupling capacitors across the power supply end of the integrated circuit.
  10) High frequency choke
  When wiring high-frequency PCB boards in PCB design, high-frequency choke devices should be connected when digital ground, analog ground, etc. are connected to the common ground, generally high-frequency ferrite beads with wires through the center hole.

The above are the precautions for PCB design high frequency PCB wiring. ipcb company also provides PCB manufacturers, circuit board manufacturing, etc.