Another point to note is that the level of capacitance should not exceed 10 times. Because this can effectively control the amplitude of the anti-resonance point impedance, if the interval is too large, the anti-resonance point impedance will be large.
Of course, this is not absolute, and it is best to look at it with software. The ultimate goal is that the impedance at the anti-resonance point can meet the requirements.
The selection of high-frequency small capacitors, in order to obtain the optimal combination, is a process of iteratively finding the optimal solution. The best way is to first roughly calculate the approximate combination, then use the power integrity simulation software to simulate, and then make local adjustments to meet the target impedance requirements, which is intuitive and convenient, and it is easier to control the anti-resonance point. Moreover, the capacitance of the power plane can also be added to the joint design.