Work with me - https://www.hans-rosenberg.com/epdc_information_yt
Other parts in this series:
https://www.youtube.com/watch?v=fxOD7g_L3gk&list=PLsWHPs7La-3JXgrFtanSCWEKTd7cE8T_l
In this video, I'll show you how to design and build a 180 degree hybrid or rat-race-ring combiner . A 180 degree hybrid is an incredibly useful building block in RF electronics since you can use it as a normal power combiner/divider and as a balun transformer at its operating frequency. I’ll explain the basic theory behind it (which involves quarter-wave transformers) and demonstrate how to design such a circuit. Additionally, I’ll guide you through creating the RF PCB layout and share the measurement results using a NanoVNA. The results are impressive, especially considering that I’m using standard FR4 material and a very simple design process which does not require expensive EM simulators like HFSS or Microwave Studio.
Website: www.hans-rosenberg.com
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0:00 intro
0:17 basic functionality of a 180 degree hybrid
1:16 what does it look like?
1:59 commercial
3:13 sigma or in phase mode of operation
4:07 delta or out of phase mode of operation
4:31 Isolation explained
4:56 port matching inside the combiner
6:27 The design process
7:24 The PCB stackup
7:40 Transmission line parameters
8:42 Layout design in detail
9:38 Measurement setup
10:09 Measurement results
12:42 Measurement results summary and cost
13:38 See you later :-)