System and method for stub tuning in an information handling system

摘要

An information handling system includes a printed circuit board (PCB) including a signal path with a trace coupled to a source, another trace coupled to a load, a tuned stub, and a via connecting the traces and the tuned stub. A method includes providing a signal path on a PCB with a trace coupled to a source, a trace coupled to a load, a tuned stub, and a via connecting the traces and the tuned stub, driving a signal on the signal path, and adjusting the tuned stub length so that the signal is unchanged between the source and the load. A PCB includes a signal path between a source and a load with two traces and a via, and a tuned path between the source and the load with the two traces, another trace, and the via, the length of the tuned path being a half wavelength stub.

主权项

1. An information handling system comprising:
a processor; a network interface component; and a printed circuit board (PCB) including a signal path comprising:
a first trace in a first conductive layer of the PCB, wherein the first trace is coupled to a signal source;a second trace in a second conductive layer of the PCB, wherein the second trace is coupled to a signal load;a tuned stub in a third conductive layer of the PCB; anda via through the first, second, and third conducting layers, and that interconnects the first trace, the second trace, and the tuned stub.