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Johanson Balun

A project log for i/o node

nrf24le1 IoT Development Kit

justinJustin 06/13/2015 at 02:430 Comments

I had originally designed the dev board using the datasheet schematic. After doing that, I went to DigiKey and found all the parts. I learned something; RF capacitors and inductors are really expensive. In singles at least. I mean really expensive, upwards of $1.50 for a single capacitor.

Looking around, I saw that a single Johanson balun costs under $1.50, uses less parts, and is just all around a simpler solution.

Looking into it more, it wasn't quite that easy. It turns out that to work with the LE1 QFN24 version, you need 2x 1nH Inductors and a small capacitor.

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