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The October issue of The PCB Design Magazine is now available.
Signal Integrity: The Insider’s Viewpoint
You’ve heard it before: “If you don’t have signal integrity issues, you will.” New low-loss materials are constantly being rolled out to help with signal integrity, and most EDA companies now offer some flavor of tool that can design high-speed, high-frequency boards. But signal integrity continues to perplex PCB designers and design engineers. This month, we bring you a variety of feature articles by some of the top SI experts around.
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Chang Fei Yee, Keysight Technologies
In electronic systems, signal transmission exists in a closed-loop form. The forward current propagates from transmitter to receiver through the signal trace. Meanwhile, the return current travels backward from receiver to transmitter through the power or ground plane directly underneath the signal trace that serves as the reference or return path. The path of forward current and return current forms a loop inductance. It is important to route the high-speed signal on a continuous reference plane so that the return current can propagate on the desired path beneath the signal trace.
Ralf Bruening, Zuken
Using powerful constraint techniques can be a double-edged sword. While the design process is made much safer by including constraints, it is all too easy to over-constrain the design and make it impossible to complete routing and placement. Even paper design guidelines can make products uneconomic to produce unless a great deal of engineering knowledge is applied during the design.
Andy Shaughnessy, Design007 Magazine
Whether we’re ready for it or not, 5G technology is coming. We decided to speak with John Hendricks, market segment manager for wireless infrastructure at Rogers Corporation, and Ben Jordan, director of product and persona marketing for Altium, about the challenges related to 5G and what this means for PCB designers and fabricators.