PRINTED CIRCUIT BOARD HAVING DC BLOCKING DIELECTRIC WAVEGUIDE VIAS

摘要

A printed circuit board is disclosed. The printed circuit board includes a first signal transmission layer, a via and a second signal transmission layer. The via connects the first signal transmission layer to the second signal transmission layer. The via includes a first region made of a first dielectric material having a first dielectric constant, and a second region made of a second dielectric material having a second dielectric constant lower than the first dielectric constant. The via allows AC Component of an electro-magnetic signal to be transmitted from the first signal transmission layer to the second signal transmission layer while blocking any DC component of the electromagnetic signal.