capacitor pad size for pulse amplifier PDN question

Thread Starter

yef smith

Joined Aug 2, 2020
696

ronsimpson

Joined Oct 7, 2019
2,894
32Ghz? That is faster than I go.
I would use a very small capacitor, 0402, because it has lower inductance and higher resonant frequency. I would use a 0402 almost toughing the power pin and them a 0805 back a small amount.
 

Janis59

Joined Aug 21, 2017
1,821
The same time, RonSimpsson, that is POWER booster thus the 35 dBm means 3.16 W.
Now, calulate with this in the mind the reactive power on that poor capacitor, and probably, the size will become to be altered because cooling. Thus, without the heatloss calculus let dont go even the single step.
 

Thread Starter

yef smith

Joined Aug 2, 2020
696
Hello,i have two points:
1.my capacitor is going thew the DC route( i have a DC puse to consider) as shown in the red arrow
2.my capacitor is a decoupling one ,its built for 50V rating how do i knw it could handle the DC power?
3.given the circumstances do you reccomend 0402 or 0508? which is better?
Thanks.
1700155705446.png
 
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