PCB Transmission Lines

Browse our library of resources to learn more about pcb design and PCB transmission lines.

Transmission Line Reflection Coefficient View a numerical example of the transmission line reflection coefficient and how simulations can help you understand the results. Read Article

Through Thick And Thin — How Do You Get High Current Into a High Speed PCB? The typical large currents in today’s high speed PCB designs require a different approach. This article will describe the stackup requirements associated with these very large current PCBs and how to design them so that they can be readily manufactured properly. Read Article

Wideband Signal Analysis in Ultra-high Speed PCB Design Wideband signal analysis may seem like black magic, but it does more than create pretty graphs. Read our introduction to wideband signal analysis to learn more. Read Article

The Digital Engineer's Guide to RF PCB Layout and Routing Read our guide to learn some best practices for RF PCB layout and routing. We’ll also look at how simulation tools can help you evaluate your RF PCB layout. Read Article

All About Your PCB Trace Length: How Long is Too Long? Learn more about PCB trace length and how transmission line losses mount in your designs. Read Article

Transmission Line Fundamentals And Electromagnetic Fields, Part 1 Learn more about transmission line fundamentals and how they carry electromagnetic fields. Read Article

Your Complete Guide to Via Stub Analysis Via stub accumulate loss for high speed and high frequency signals. Here’s how you can spot problems with stubs and solve them easily. Read Article

S-Parameter Measurements and Errors in Power Integrity No matter where you look, it seems S-parameters never go away! They are mandatory tools for understanding some systems, such as an interconnect or antenna, while other network parameters can sometimes give a better conceptual understanding of electrical behavior. These parameters are normally reserved for signal integrity among electronics engineers, but if you look hard enough, you’ll find that S-parameters are also used for power integrity Read Article

Why Power Rails Need to be Low Impedance Read to learn what constitutes a power rail, how it functions, and how fear can be a driving factor in making bad design decisions. Read Article

Huge Vu-meter with RGB LEDs Project A laboratory journal to guide you through the steps to develop a successful product that value-conscious customers are sure to love. Read Article

Solder Bridge Jumper Best Practices in PCB Design A PCB variant is often simply thought of as a new layout created from an old design. However, if you’re creative with your routing and layout, you can use a solder bridge jumper to configure portions of a single PCB layout for multiple variants. This lets you quickly create variants of a PCB layout without rerouting traces or changing your schematics. If you plan to use jumpers in your PCB layout, there are some important guidelines to follow to Read Article

Eric Bogatin Debunks Common Misconceptions About Transmission Lines In this episode, signal integrity expert Eric Bogatin aims to give PCB designers some needed guidance when it comes to dealing with transmission lines. Read Article

The Role Of ISU Petasys, A Multilayer Manufacturing Company in Realizing a Successful PCB Implementation John Stephens, Senior Vice President of Sales for ISU Petasys (pronounced “E-soo”), built his first circuit board in 1974. Like many others of us in the industry, he got a first-hand education in PCB design, and manufacturing and assembly by working in the aerospace industry. He explains, “I started in aerospace at Litton Guidance and Control Systems, where I worked in a process development lab that was basically a prototyping shop where we Read Article

37:20 Efficient PCB Routing Using Gloss and Retrace Tools The primary goal of your traces is to carry signals throughout your board without losses. To do this properly, you Watch Video

31:31 Transmission Line Impedance Calculation With Altium Designer 20 Today’s PCBs contain many transmission lines. Combine this with increased clock frequencies and data rates and the result is a critical challenge to high-speed design. Neglecting these dynamics can undermine product development by compromising performance, power consumption, EMC/EMI compliance, and more - leading to delayed design cycles and opening gaps that can be exploited by your competition. Hone your high-speed design skills by joining us as we discuss the typical transmission lines encountered in today’s designs, the PCB variables that affect impedance, as well as how to create, calculate, and design transmission lines in Altium Designer. Learn how to maximize the built in SIMBEOR® engine by Simberian to craft impedance profiles and manage transmission lines in your designs. This Live Webinar recording covers the following: Current trends in electronics development PCB transmission line model and impedance calculations Transmission line with specified impedance in Altium Designer Don’t pass up on this opportunity to experience the industry’s best in class design experience! Watch Video

Living on the Edge (Rate) — It’s All About Time and Distance The focus of this article is the clarify the origins of the phrase edge rate, what it really means relative to the design process and the best means for addressing it. Read Article

Reflecting on Your Design, Part 2, What Do Reflections Do to a Signal? In part 1 of this article, I described what transmission line reflections are, how they are created and what the resulting waveforms look like. This part of the article will discuss what reflections do to a signal. Figure 1 is a typical 5V CMOS driver driving a 50-ohm transmission line that is 12 inches or approximately 2 nanoseconds long. There is a CMOS receiver at the end of the line that is a tiny parasitic capacitor. For these purposes, it Read Article