I've been designing a 4 layer board (layer 1 & 4 is copper, layer 2 is all ground, and layer 3 is used as a power plane).
I've been using decoupling caps. to filter out the ac noise coming from the power source (3.3V) that uses the power plane from layer3 from an LDO.
The decoupling caps. I've been using are on the bottom layer and have the values of 100pf, 10nf, and 10uf that are close to the DUT pins. From the equation, x = 1/[2(pi)(f)(c)] the frequency is 2.4GHZ and all the values of the caps. shows that x < 1.
Due to space constraints, I've been told that since 10uf resonates at a lower frequency it's allowed to be further away from the DUT pins and closer to the source. Is that true?