Uploaded July 2024 | Updated September 2026, 2 weeks ago

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#228 In this video I continue looking at cavity filters by performing some experiments on a set of practical builds. I start with a single resonator single port cavity just to confirm the simulation results; but from there I move onto a set of practical filter, looking at the construction methods that I used, the tools used for dimensioning and finally a look at the filters response.

Filter series:
Ep1 – Intro : youtu.be/Zipbm27LoZ4
Ep2 - Passive RC Filters: youtu.be/NBLCqqmvy0A
Ep3 - Active RC Filters: youtu.be/FQYtOj_4kbw
Ep4 – More Active RC Filters: youtu.be/H_DiGSNaFyg
Ep5 - Introduction to LC Filters: youtu.be/KECCpj1Qpn0
Ep6 - LC filter limitations: youtu.be/DYJkmq5xUlc
Ep7 - Piezo-Electric Filters: youtu.be/KJK27K3ibw8
Ep8 – Crystal Filter Measurements and Design: youtu.be/J4wgCfLWI00
Ep9 - Cavity filter Basics: youtu.be/ALjjW4NgBzg
Ep10 - Cavity filter Experiments: youtu.be/F6vqAw1Cn8E
Ep11 - Stub filters: youtu.be/tQnCpV4L_6s

Tools and calculator links:
https://www.changpuak.ch/electronics/interdigital_bandpass_filter_designer.php
coil32.net/online-calculators/helical-resonator-bandpass-filter.html
rfshop.co.uk/microwave-filter-design-programs-and-articles

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