How do power integrity engineers measure the merit of a power distribution system?
A fundamental figure of merit is the self impedance at a given point in the power distribution network. A lower self-impedance is better. Low values of self-impedance will inhibit the generation of noise power. Another fundamental figure of merit is the transfer impedance between two points in the power distribution network. Again, the lower the value the better. A low value of transfer impedance will inhibit the propagation of noise power between those two points. • Q: What do EBG structures built into a power distribution network do to the self and transfer impedances? A: The primary function of an EBG structure in a power distribution network may be understood in terms of impedance. Its function is to lower the self and transfer impedance of the network over the frequency range associated with the stopband. Lowering the self and transfer impedances will result in lowering the generation and propagation of noise power, respectively. • Q: What is often cited as the most difficult freq
