design - What to think about when designing HF PCB's?

I am currently designing a small PCB in Eagle Cad that has a GPS 1PPS signal (one short pulse per second) as input. The pulsetime for the 1pss is something like 1us.

Ok, I know thats not super HF but still.

What are good design practises when designing PCB's for HF?

• Are curved corners of routes better then perpendicular?


• Is thicker routes better than thin or opposite?


• Groundplane = good?


• etc..