Wow, I love spirograph art, so cool! :-) Really looking forward to your updated program to show students in my EM courses how it should be done. Using a Smith Chart program along with the equations really helps to remove the black box / black magic aspect of so many aspects of antenna, transmission line and microwave engineering. At least for we old timers, I guess.
Randy J. Jost, PhD
r.jost@...
435-770-9855 (c)
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On 04/28/2025 9:07 AM MDT Brian Beezley <k6sti@...> wrote:
Thanks, Dean. The S22 Smith plot is available. I've attached one that looks like abstract art. I was just curious whether I was gilding the lily.
The program includes a utility to merge two .s2p files containing S11 and S21 to produce a file with all four s-parameters. This is for NanoVNA users willing to take the trouble to measure both forward and reverse response. Both reference impedance renormalization and the Y21 method work best with all four parameters.
The 800 x 600 test plot looks fine. I think the forum rescaled the 1024 x 768 and then scaled it back to its original size.
I'm going to leave admittance for another day (probably tomorrow). I keep finding small bugs so I'm going to concentrate on digging them out before posting the program later today.
Brian
