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Brian, S22 is also useful and a Smith chart presentation would be desirable. But this would have less priority because the nanovna does not have the capability to measure it. Plus, you can always

This is just a test plot. I noticed that the 1024 x 768 plots I posted earlier were not exactly reproduced. They are slightly fuzzy and colors are a bit off. Let's see how well this this 800 x 600

Well, I'm getting there. So many pesky details. I find Smith plots fascinating. It's hard to resist the urge to post dozens of really strange and interesting curves. I hope I don't become an

home made antenna is with ONE sma connector (no balun added) while factory made has a wilkinson splitter and two cablesz factory antenna has a triangle "groundplane" (while homemade has not) ... so

Hello, Homemade BLUE bowtie antenna vs factory made BLACK whole board with the same bowtie antenna. Over 300 - 330 MHz range I am seeing some ~20 change in reactance with the home made antenna and ~50

Is the Nanovna connected? Nanovna-app doesn't sweep until you press the start sweep button, did you do that?

I downloaded the Nano VNA App from the website. And tonight I tried to use it unsuccessfully. I had connected the vna to my laptop > selected com port 1 for the usb, and didn't get a response

While in colledge I took a computational physics class and was assigned a matrix with fractions such 1/3, 1/7 to evaluate three ways by long hand pencil and paper, with a handheld calculator, and

From an educational aspect it would be useful to have the option of displaying gamma - maybe a separate selection option to display either SWR and frequency or impedance and gamma? Dave, ZL3FJ

When you calibrate the Nano (on device calibration) in the range as the documentation suggests 0-900MHz with 401 points and then calibrate using the NanoVNA Saver in the same range using, for example,

The Smith chart, of course, can be replaced by any of many software packages that yield just numerical results, but not the feel for what's going on. One may be really happy with incorrect numbers

Good. The less clutter the better. So far I display frequency and SWR. Impedance is just about ready to test. I will have to add the upside-down ohms symbol to my homebrew fonts when I do admittance.

Hi Brian, With regards to the marker, I can offer an opinion. I rarely used the raw reflection coefficient directly. I was looking to find a return loss, VSWR, or impedance, all of which would require

Do you refer to Phillip Smith's original paper? DaveD KC0WJN [email protected]> wrote:

Another useful input, Dean. I had not planned to do admittance, but adding it should not be hard. I've implemented a marker. You click near the curve to activate it. You can click again or rotate the

From the original publication in the early 1950s, the Smith Chart addressed impedance space, not just line lengths. I once had in my hands while working for a living (now retired) the original

Brian, While you're at it, the option of an admittance version of the Smith chart would be also helpful. 73, Dean W8ZF

Hi The Smith chart is simply a specific graphical method for illustrating impedances—originally as a function of line length, and now, with the NanoVNA, as a function of frequency. Its advantage lay

Paul, In your screenshot, the vertical grid line nearest the center is at 910.000 MHz, the nearest "round" number. Does that explain the offset you see? --John Gord

Yes, Dean points out an interesting aspect - if you look at it and it’s just spirals, you know a simple network is likely to work. If it’s back and forth zig zagging, probably not.