Patent ID: 7705695
Filing Date: 2010-04-27
Classification: H01P,H05K

Abstract:
1. A composite via structure in a multilayer printed circuit board (PCB) comprising: a first functional part extending in a vertical direction from a first pad disposed at one side of the PCB to a special pad embedded in the PCB for a connection to a planar transmission line, providing a low-return loss and shielded vertical transition between the first pad and the special pad, and including: a second functional part providing an open-circuited resonant length extending in the vertical direction from said special pad to the second pad disposed on the opposite side of the PCB, and including: a plurality of conductive plates disposed at the conductor layers of the PCB, connected to the signal via conductor, and separated from grounding conductors by isolating slots, wherein said second pad is connected to the signal via conductor and separated from grounding conductors disposed at the same conductor layer by an isolating slot.