Hi, this not seems a CW
...
I started with VSWR too, was fun to try-and-error a Vivaldi out of copper tape. When the Smith chart shows a bit too much inductance, cut some tape and make the coupling capa larger... Works like a charm, got the SWR below 1.2 in the entire 2.4 G ISM band (need directional antennas for the radar). Now I have the rough shape, will cut it out of copper sheet and put it in a can (side lope suppression) to reduce direct path reception.
Its amazing what this little thing can do, but your software is definitively the icing on the cake. Reference subtraction, all the options for stimulus, automatic marker placement, ... incredible.
What hardware variant/trusted seller do you recommend that gives the best results for the software, I've seen a (most likely fake clone of fake clone) NanoVNA of a friend that was frankly speaking a piece of junk, never producing 2 similar measurements in a row .
So is there a trusted reliable seller somewhere, preferably in EU, best in DE, but wherever it is if it ships in DE is OK.
Many thanks for your software,
DC1MC
What hardware variant/trusted seller do you recommend that gives the best results for the software, I've seen a (most likely fake clone of fake clone) NanoVNA of a friend that was frankly speaking a piece of junk, never producing 2 similar measurements in a row .
So is there a trusted reliable seller somewhere, preferably in EU, best in DE, but wherever it is if it ships in DE is OK.
Many thanks for your software,
DC1MC
What hardware variant/trusted seller do you recommend that gives the best results for the software, I've seen a (most likely fake clone of fake clone) NanoVNA of a friend that was frankly speaking a piece of junk, never producing 2 similar measurements in a row .
So is there a trusted reliable seller somewhere, preferably in EU, best in DE, but wherever it is if it ships in DE is OK.
Many thanks for your software,
DC1MC
This is the manufacturer (Hugen) of Nano H and H4, TinySA etc: https://nanovna.com/?page_id=121
I would suggest that you get the H4 as it is a more capable device with standards that have been characterized (search for Kurt Poulsen's calibration data).
What hardware variant/trusted seller do you recommend that gives the best results for the software, I've seen a (most likely fake clone of fake clone) NanoVNA of a friend that was frankly speaking a piece of junk, never producing 2 similar measurements in a row .
So is there a trusted reliable seller somewhere, preferably in EU, best in DE, but wherever it is if it ships in DE is OK.
Many thanks for your software,
DC1MC
This is the manufacturer (Hugen) of Nano H and H4, TinySA etc: https://nanovna.com/?page_id=121
I would suggest that you get the H4 as it is a more capable device with standards that have been characterized (search for Kurt Poulsen's calibration data).
Thanks for the tip, the H4 variant is also called "Hugen 3.4 with a 4" screen"?
"This VNA is the latest official 3.4 Hugen version, it has a TFT touch screen available in 2 sizes 2.8 "(7.1cm) and 4" (10.1cm), power supply by USB-C cable (supplied) or internal battery included 650mAh or 1950mAh (H4)."
Cheers,
DC1MC
Thanks for the tip, the H4 variant is also called "Hugen 3.4 with a 4" screen"?
"This VNA is the latest official 3.4 Hugen version, it has a TFT touch screen available in 2 sizes 2.8 "(7.1cm) and 4" (10.1cm), power supply by USB-C cable (supplied) or internal battery included 650mAh or 1950mAh (H4)."
Cheers,
DC1MC
I have some "NanoVNA-H4" that never sees any use due to the lack of stable firmware for it. It appears to have similar problems that I saw with the original Nanovna a few years ago. It cost about $100 USD. I bought it after someone here was posting about having problems when trying to use my software with it. While some newer firmware allows it to support more data points, it's plagued with problems. The focus seems more on adding features than fixing problems. If you are planning to run headless, why pay for the larger LCD. I would save the $50 and get the original if you are working below 300MHz, need narrow band or want to measure PDNs.
I have some "NanoVNA-H4" that never sees any use due to the lack of stable firmware for it. It appears to have similar problems that I saw with the original Nanovna a few years ago. It cost about $100 USD. I bought it after someone here was posting about having problems when trying to use my software with it. While some newer firmware allows it to support more data points, it's plagued with problems. The focus seems more on adding features than fixing problems. If you are planning to run headless, why pay for the larger LCD. I would save the $50 and get the original if you are working below 300MHz, need narrow band or want to measure PDNs.
I haven't had any issues with H4 and DisLord firmware (I believe that all H4 in production come with his firmware) but I only use NanoVNASaver.
Anyway please post your issues at https://github.com/DiSlord/NanoVNA-D/issues or https://groups.io/g/nanovna-beta-test/
Hugen has raised the price recently, I got my H4 last November, from his store, for less than $60. Current price is ~$80 (with shipping).
I have no plans to invest any more time into the H4. If you're interested, you may find the discussion about some of the problems I mention with the H4 here:
https://www.eevblog.com/forum/rf-microwave/nanovna-custom-software/msg3577360/#msg3577360
I have no plans to invest any more time into the H4. If you're interested, you may find the discussion about some of the problems I mention with the H4 here:
https://www.eevblog.com/forum/rf-microwave/nanovna-custom-software/msg3577360/#msg3577360
Browsed the next few pages, his English proficiency certainly did not help with diagnosing the issue.
Anyway can you link to the firmware that works for you, if I get some free time I would like to compare
the results that I get with it and with the latest firmware from DisLord.
I never found a version of firmware that would work with my H4. If I did, we wouldn't be having this conversation.
For the original NanoVNA, I am still using the version that some of the locals here had worked on to correct some of the problems. That version is stored with the software. For the V2Plus4, I am using the firmware that was supplied with it. That's been stable from the start.
Adding something like this on a separate tab would be simple enough. Maybe allow user to select between gain and stability circles on the same graphs... I try to keep the basics on that main menu and jamming it onto that may be a bit much.
After some thought, the plan is to add onto the 2-Port Plot tab.
After some thought, the plan is to add onto the 2-Port Plot tab.That's would be OK, thank You.
Though I am unfamiliar with Unilateral factor.
Does it have the same definition as the mu-factor mentioned in the .pdf paper above?
In fact, most modern VNAs have this stability analysis option built-in.
At my previous job I had access to all these tools, but unfortunately, now I've been fired out, so now I am just in a process of setting up my home lab, where I cannot afford any expensive equipment.
For me it's just a hobby now, nothing more.
I shall post here some images with stability analysis graphs, but not too soon.
What's might be interesting to see in the SW features is the ability to plot a family of load stability circles on one graph simultaneously in case of broadband stability analysis, for implemented frequency sweep, as it is shown in the last section of L. Besser paper
Thanks,
Alex