How do you minimize parasitic capacitance in high-frequency analog layouts?

In my experience, it’s important to use low-k dielectric materials for the substrate. I find that this significantly reduces parasitic capacitance. You might also want to keep the layout as compact as possible to minimize unwanted capacitance.

I’ve found that placing decoupling capacitors close to the power pins of the ICs helps a lot. You should also try to route high-frequency signals(metals)rom sensitive analog areas to avoid interference.

We always ensure that the layout is symmetrical, especially for differential pairs. This helps to balance the parasitic capacitance. You should also use wider metals(also use heigher level metals) for power lines to reduce resistance and capacitance.