Why these PCB shorts are 50 Ω

Published: 12 March 2023
on channel: Keysight Labs
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Fun with PCBs and trace impedance
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Via stub resonance 3d Print file: https://www.printables.com/model/4225...
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In this video we explore RF engineering and circuit design basics by measuring the impedance of traces (transmission lines) using a VNA. We explore how changing the width of the trace impacts impedance. We also dig into via stub resonance and how to fix it with back drilling.

0:00 Why impedance matters for PCBs
1:51 S-Parameter measurements with a VNA
2:38 How PCB trace / transmission line width impacts impedance
5:16 How PCB stackup impacts transmission line / trace impedance
7:39 Getting a transmission line with 50 ohm impedance
10:41 Keysight World Live from the Lab!
11:54 Exploring via stub resonance and PCB backdrilling
13:36 How liquid nitrogen impacts PCB impedance
15:43 accidentally lighting a PCB on fire and watching the impedance change

Shoutout to @samerps on Twitter for the incredible animations/simulations!

March 14 - Debunking Circuit Design Myths
How accurate is conventional PCB wisdom? What happens when we force designs into weird corner cases? For example, how does a 50 Ω controlled impedance path change when it's dipped in liquid nitrogen?
Pouring Liquid Nitrogen onto a PCB
We'll compare real-world board measurements to the simulation and dig into concepts every electrical engineer needs to know - things like return current paths, via stubs, VNA tips, and more.
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Proper testing is the only way to make sure a device will behave the way it's supposed to.
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September 12 - Demystifying 6G and RF Engineering
Join us for expert sessions as we break down cutting-edge wireless communication technologies.
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#electricalengineering #rfengineering #circuitdesign #PCBdesign #networkanalyzer #Keysight #keysightworld #livefromthelab #circuitdesigntips #circuitboarddesign #printedcircuitboard #impedance #transmissionline

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