Uploaded November 2022 | Updated September 2026, 1 week ago

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#177 In this video I continue looking at the quarter wavelength transformer, by performing some experiments. First I look at the link between the physical dimension of the transmission line in relation to the frequency for which it is a quarter wavelength, and then I preform various impedance transformations to see how well the theory matches practice.

Related topics:
Resistive matching: youtu.be/raw_LAJGvAE
Lossless matching part 1: youtu.be/-_T587mucaI
Lossless matching part 2: youtu.be/cXPJgnmpCrw
Transformer matching part1: youtu.be/cW1Qn0DQwJM
Transformer matching part2: youtu.be/-cG8Q1Mgrtc
Transformer matching part3: youtu.be/-7tXl7y7Ydo
Quarter wavelength matching part1: youtu.be/ie0eBuPohHs
Quarter wavelength matching part2: youtu.be/KLNK935wglA

Further reading and used datasheet:
zuken.com/en/blog/how-to-calculate-trace-length-from-time-delay-value-for-high-speed-signals
https://www.tme.eu/Document/151b7fc68e82e16d70ee1f3bf3c18100/M_004-005-006-007_RG-coaxial_cables.pdf
https://www.tme.eu/Document/268c33349b77c19407dbb928ba18de85/RG6-CCS-TRISHIELDEN.pdf

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