Uploaded February 2025 | Updated September 2026, 2 weeks ago
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#244 In this video I look at a wider bandwidth implementation of the quarter wavelength impedance transformer - the stepped impedance transmission-line transformer. In essence its a series of multiple quarter wavelength transformers, one is series with the other, which brings a very interesting propriety - the total bandwidth increases.
Impedance matching series:
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
Stub matching: youtu.be/AbQn6H4j6I0
Stepped impedance transformer: youtu.be/CB322meXvek
Used links and further reading:
microwaves101.com/encyclopedias/quarter-wave-transformers
microwaves101.com/download-area
eng.libretexts.org/Bookshelves/Electrical_Engineering/Electronics/Microwave_and_RF_Design_III_-_Networks_(Steer)/07%3A_Chapter_7/7.4%3A_Stepped-Impedance_Transmission_Line_Transformer
Special Thanks to all my supporters on Patreon!
If you liked this video be sure to check out my other videos and you can also subscribe to be up to date with all the new ones!
If you want to support the creation of more and better videos please consider checking out: patreon.com/feszelectronics
Discover Easy, Affordable, and Reliable PCB manufacturing with JLCPCB! Register to get $60 New customer coupons: jlcpcb.com/?from=FesZElectronics
#244 In this video I look at a wider bandwidth implementation of the quarter wavelength impedance transformer - the stepped impedance transmission-line transformer. In essence its a series of multiple quarter wavelength transformers, one is series with the other, which brings a very interesting propriety - the total bandwidth increases.
Impedance matching series:
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
Stub matching: youtu.be/AbQn6H4j6I0
Stepped impedance transformer: youtu.be/CB322meXvek
Used links and further reading:
microwaves101.com/encyclopedias/quarter-wave-transformers
microwaves101.com/download-area
eng.libretexts.org/Bookshelves/Electrical_Engineering/Electronics/Microwave_and_RF_Design_III_-_Networks_(Steer)/07%3A_Chapter_7/7.4%3A_Stepped-Impedance_Transmission_Line_Transformer
Special Thanks to all my supporters on Patreon!
If you liked this video be sure to check out my other videos and you can also subscribe to be up to date with all the new ones!
If you want to support the creation of more and better videos please consider checking out: patreon.com/feszelectronics








![Timeless ICs - Linear Regulators
#255 In this video I look at some of the oldest ICs that are still in use and production today. These are not the best in their class but they are well known and easily accessible. Most of these components are a common site both in older and newer devices and well suited for their job.
Related videos:
uA723 DIY BenchSupply [1/2] - https://youtu.be/ZZFIRvxPbyQ
uA723 DIY BenchSupply [2/2] - https://youtu.be/8E8V7Uw-3eg
Discrete Supply build - https://youtu.be/8ImywucbnKM
Supply teardown - https://youtu.be/xL2QDJvKV-I
Datasheets and References:
https://ve6aqo.com/Manuals/uA723_Application_Note.pdf
www.ti.com/lit/ds/symlink/ua723.pdf
https://www.ti.com/lit/ds/symlink/lm317.pdf
https://www.ti.com/lit/ds/symlink/lm137.pdf
https://www.ti.com/lit/ds/symlink/lm78l.pdf
https://www.ti.com/lit/ds/symlink/lm1117.pdf
https://www.st.com/resource/en/datasheet/ld1117.pdf
Special Thanks to all my supporters on Patreon!
If you liked this video be sure to check out my other videos and you can also subscribe to be up to date with all the new ones!
If you want to support the creation of more and better videos please consider checking out: https://www.patreon.com/feszelectronics Timeless ICs - Linear Regulators](https://i.ytimg.com/vi/EBFM2wS0GXo/mqdefault.jpg)

