See the Q&A: QuestionAnswer When I transition to and from stripline to microstrip, I put gnd vias close to the transition. How important is it to stitch the ground planes together at other locations? Why?As you pointed out, the importance of stitching ground planes together depends largely on the frequency of operation. The farther away the stitching vias are from the transition, the less impact they have on the circuit’s performance. A useful way to think about this is in terms of waveleng...
