What do EBG structures built into a power distribution network do to the self and transfer impedances?
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 frequency range to suppress noise at the printed circuit board (PCB) level? A: PCB engineers often cite the frequency range of 100 MHz to 2 GHz as the most difficult frequency range to suppress noise. Many waveforms used in digital systems have fundamental and harmonic frequencies that fall in this range. • Q: What technology does WEMTEC offer to address the 100 MHz to 2 GHz frequency range? A: WEMTEC has developed hybrid EBG structures which are a combination of resonant via arrays and inductive grids. Many embodiments of hybrid EBG structures are possible including designs wit
