A BEGINNER’S INTRODUCTION TO PCB TRACE IMPEDANCE


Program Description:   What is impedance anyway, what causes it, why does it matter and what happens if we get it wrong? This entry level presentation describes the component properties of a PCB trace (a transmission line) that come together to determine the impedance. Maybe surprisingly, you experience impedance in various other forms every day; but you never thought of it that way. So we’ll begin by briefly identifying and acknowledging some of those experiences, then relate them to the electrical transmission lines Next we’ll look at the transmitted signal as it progresses from the signal source into the line, and what happens when it eventually reaches the end of the line – depending on how the line is terminated; open/short/matched/mismatched. We can discuss why fabricators often don’t use the same Er (Relative Permittivity, often called Dielectric Constant, sometimes Dk) And throughout, we’ll keep the subject light and the mathematics simple;

Speaker:  Ken Taylor ~ POLAR INSTRUMENTS

About this Speaker:  Ken Taylor never designed a board in his life, nor did he build one. And he’s too old to begin now. He began his working career teaching high school and college; and he is ending it as manager of Polar Instrument US operations. Notwithstanding, he understands the physics PCB transmission line impedance and has worked with engineers, board designers and board manufacturers during his entire Polar career. His teaching experience helps him convey concepts in a non-threatening way.

E-Mail this Speaker with pre-talk questions or suggestions: dgdirect@polarinstruments.com