Re: Antenna simulation result different from experiment with NanoVNA
exactly what i have done :-) a bit of a problem problem may be that you have a staircase instead a diagonal line (finer resolution> finer steps) ... but ok i can live with that you have to build a
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Siegfried Jackstien
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#29579
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Re: cable extensions etc.
I use the Asian ones on eBay but if you want a brand name with industrial quality use Amphenol. Not cheap though... https://www.amphenolrf.com/132171.html Roger
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Roger Need
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#29578
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Re: cable extensions etc.
Likewise. Looking for good quality SMA Connector Savers. I agree with Gary, very hard to judge online. Regards...Bob VK2ZRE
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Bob Ecclestone VK2ZRE
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#29577
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cable extensions etc.
looking for some recommendations for good extensions for the sma connectors on the nano. good build quality is more important than price to me. its hard to judge online ads as they all claim to be
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Gary Lee
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#29576
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Re: Antenna simulation result different from experiment with NanoVNA
And I think Sonnet Lite (the student/free) version will do simple patches. The limitation is in how big a model you can build. If you give them your name, etc., the free version will have increased
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Jim Lux
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#29575
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Re: stand for the NanoVNA???
No, standard battery lasts long enough for my purposes. Anyway, I mainly use it with nanoVNA Saver. Michael.
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Michael
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#29574
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Re: stand for the NanoVNA???
tooo big and it does not fit in your shirt pocket ... thats a down side ... grin (sorry could not resist) dg9bfc sigi Am 01.09.2022 um 22:34 schrieb John:
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Siegfried Jackstien
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#29573
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Re: stand for the NanoVNA???
i would have used n sockets ;-) ... but i have a v2 that goes way higher in frequency as the older nanovna but ok ... nice work do you have a bigger battery also or a second one soldered in parallel??
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Siegfried Jackstien
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#29572
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Re: stand for the NanoVNA???
and no reading glasses needed anymore ... grin dg9bfc sigi ps i already told to "diSlord" that you can hide half a dozen or more 18650 cells behind a 7 inch screen ... yes he is working on fw for 7
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Siegfried Jackstien
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#29571
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Re: stand for the NanoVNA???
Bigger screen begets a bigger case which begets more weight/stability which begets a bigger battery which begets longer use time... where is the down side?? John VE7KKQ siegfried.jackstien@...>
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John
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#29570
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Re: stand for the NanoVNA???
The following is a copy of my post of 30th August 2021 which illustrates my solution to the enclosure/connector issues: The attached pictures show my solution to the SMA issue. 1) BNCs match all my
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Michael
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#29569
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Re: stand for the NanoVNA???
IF YOU REALLY HIT THE USB CABLE THAT TINY 2.8 INCH UNIT WILL FLY ACROSS THE ROOM HI HI buy a 4 inch screen and print a bigger case maybe?? diSlord is experimenting with even bigger (7 inch) screens on
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Siegfried Jackstien
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#29568
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Re: Antenna simulation result different from experiment with NanoVNA
sonnet works superb and is quite easy to use ;-) see picture (circular polarized patch ... a square with truncated corners) dg9bfc sigi many thanks for making that list of the free eda soft ... maybe
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Siegfried Jackstien
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#29567
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Re: Antenna simulation result different from experiment with NanoVNA
Many microwave materials publish TWO dielectric constant values; one which is used in standardized QC tests, and another one, the "design" value, which should be used for simluation. Be certain that
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Donald S Brant Jr
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#29566
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Re: stand for the NanoVNA???
AT LEAST USE A PORT EXTENSION!! a male female adaptor (port saver) ... if worn out just replace the adaptor and NOT the socket in the vna any sma connector that you use often should have such an
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Siegfried Jackstien
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#29565
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Re: stand for the NanoVNA???
you shoud measeure a ht antenna like you would use them .. means hold the vna in your hand the coupling to the body is needed on some if not all ht antennas (the transmiter needs something "to feed
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Siegfried Jackstien
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#29564
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Re: stand for the NanoVNA???
I don't think I'm going to need any of those BNC to SMA connector holders... as I have a few of these that I could put onto the NanoVNA...
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n1evh
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#29563
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Re: Antenna simulation result different from experiment with NanoVNA
You have to look closely at their data sheets, but they come up with i.d.? numbers that are not FR4.? That was a specific material no longer made.. But this is much like making a Xerox copy on your
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KENT BRITAIN
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#29562
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Re: Antenna simulation result different from experiment with NanoVNA
On your 2nd point I get good correlation between 4NEC2, EZNEC models and VNA measureme
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Brian Howie GM4DIJ
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#29561
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Re: Antenna simulation result different from experiment with NanoVNA
On 01/09/2022 14:46, Diane BONKOUNGOU wrote: > Hi Brian, > Thanks for your reply, attached is my code. I put the dielectric at 4.8 > it's FR4. I started with 4.29, my PCB was made by PCBway company. I
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Brian Howie GM4DIJ
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#29560
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