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Okay, I have a NanoVNA ordered and I have a VNWA.
I know the differences between X, R and Z.
What I do not understand is Xr, Xp, Rr, Rp, Zr, Zp, |Z| etc.
I know the r and p mean series and parallel but I do not understand how it
functions with single and two port connections.
What are the differences, what does it mean as far as connections and readings goes?
I need a Dummies Guide to these parameters, explaining differences and connection
examples, etc.
A reference to a book or webpage would be nice.
Thanks
Larry
n0sa

Hi Larry,
Please refer to the forum Wiki. There are a number of application note and reference links there:???

/g/nanovna-users/wiki/External-links
Refer to the Smith Chart tutorials.
...Larry

A reference to a book or webpage would be nice

Here is a start

Larry, this is basic electric circuit theory.? Any linear bilateral complex impedance can be expressed as an equivalent circuit of two components, a resistance and a reactance.? You can express them either as a series combination or as a parallel combination.? So all the parameters you mention are the results of that calculation.
A series combination is usually expressed as R + jX, and the R is called series R, or Rs.? And so on.? Read a basic ac circuits textbook to get full explanations.
Bob

On 11/14/19 9:54 AM, Bob Albert via Groups.Io wrote:

Larry, this is basic electric circuit theory.? Any linear bilateral complex impedance can be expressed as an equivalent circuit of two components, a resistance and a reactance.? You can express them either as a series combination or as a parallel combination.? So all the parameters you mention are the results of that calculation.
A series combination is usually expressed as R + jX, and the R is called series R, or Rs.

???? And given the impedance in series format, it is possible to convert to an equivalent parallel circuit - and vice versa.? The equivalency will only be valid over a limited frequency range.

???? There are a lot of places on the web that can help you with this stuff.? For example, microwaves101.com.? Some specific pages, in no particular order:



















???? Wikipedia also has some good stuff:




???? A good source of information on all things RF (Radio Frequency) is the ARRL Handbook for Radio Communications.

Thanks for all the good links, looks like I have a lot of reading to do.
I am trying to learn all this stuff and it takes me awhile to get my head wrapped around all of it.
Larry
n0sa

On Thu, Nov 14, 2019 at 01:52 PM, Larry Naumann wrote:

Thanks for all the good links, looks like I have a lot of reading to do. I am trying to learn all this stuff and it takes me awhile to get my head wrapped around all of it.

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Larry,
Don't let the terms overwhelm you. If you've never used a VNA before, it can be a "can't see the forest for the trees" kind of thing, but depending on what you want to do with the NanoVNA there are a lot of information you can ignore until a problem presents itself where you actually need to learn the terms.

I worked in the electronics industry for 30 years and about the only time I actually needed to apply the terms and formulas you referred to was when I was designing filters or matching networks. If you are still in school and studying electrical engineering you will definitely need to be familiar with the terms. If you just want to check the VSWR of your antennas then you can ignore them until you want to broaden your knowledge.

- Herb

I am retired and I like to learn new things. I am a ham and l like experimenting with antennas.
I am interested in xfmrs for efhw antennas. I have a VNWA and thought it would be fun to play with the nanovna too, seeing as it only cost $45.00.
I read a lot of Owen Duffy’s articles and like to try out his experiments while learning a bit about rf.
The nanovna uses different terminology than the VNWA but I think I understand the differences.
When my nano arrives I can do comparisons between the two.
Larry