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@Dave : Thanks, 1.86:1 was before I put the PCB into its final plastic case. Then within the case it jumped to 2.6. That's when I calculated the corresponding matching values. I've put an 8.2nHload

I finally managed to implement renormalization for unequal port reference impedances. The images show unequal resistances for a 10.7 MHz Murata ceramic filter. I optimized them by hand for minimum

Further addressing small values of inductance: There is really no need to buy SM inductors which may or may not be apropriate. Small nH inductors can easily be made of short lengths of appropriate

Nico, So you have two issues here... Th first one is that you will have difficulty knowing what the impedance is near the matching network because your measuring system is affecting the results. That

Nico, In your case the purchased helical is one half of the antenna. The other half is the "buried" side of the transmission line and the ground plane of your board. When making measurements of the

SUGGESTION: Forget about these "canned" solutions. Download and install SIMSMITH. https://www.ae6ty.com/smith_charts/ There is also a accompanying tutorial at: https://www.w0qe.com/SimSmith.html Dave

It looks like the cal may not be taking. RESET......COMPLETE CAL.......STORE in a register. Go back and verify that the OSL displays as it should. If not, OPEN CASE....INSTALL PROPER LOAD......from

I have been using my nanovna SAA2N for months without issues, and I bought it from R&L who is an authorized distributer of legitimate Nanovna's. This morning my issue started after I calibrated the

Hello, In the files section you will find a process to recover from "White Screen Recovery". Follow it PRECISELY STEP by STEP!. If that does not work you could try, for the lack of a better term, a

The image that shows a SWR of 2.6 : 1 (the sixth image), all you need to do is add an inductor in series to cancel the -j 45.6 ohms. At 916 MHz that would be 7.9 nH. In reality, 1.86 : 1 is not bad at

You can actually calculate the values of an L-Network's two components without knowing Q. It is sufficient to know just the value of the load impedance and the impedance you want to transform that

Roger, Thanks for this advice. I'll try it out tonight. Look at the picture and zoom it (not zoomed it does not show up properly), you'll see a blurred larger line around the feedline. This is the

L-network values with the nano and then with the AT-100M Pro automatic antenna tuner: I measured one dipole antenna of mine (antenna fed with 1:1 balun, and 72-ohm Belden 8222 twin lead) with a

I'm missing a lot of information to understand (in French) your participation. I remember the last line: A 3-piece Pi adapter can be upgraded to a 2-piece L adapter. If impedance matching is the only

All four are all 2 element ell networks. If the values have been calculated correctly each one would provide the required match. (1) has low-pass characteristics. (4) is a high-pass network. The other

Hi All. I need to build a Pi Network for my circuit as shown in the fig below. 1741926237187.png So I have a 'Pi Matching Network' in my circuit. The datasheet asked me to build a Pi Matching Network.

Do you have a trace inside the board to be the other half of the transmission line? One turn through the ferrite is not enough. The impedance goes up approximately as the square of the turns.

Hi everyone, No, I haven't abandoned yet ! I got my revised pcb (attached picture) yesterday 1- Revised ground plane dimensions which I made the same as the test board shown in the antenna datasheet.

Very good Mitch. Happy to see you suceeded in beating the electrons into submission. Lesson learned... Neatness counts.

yay indeed.. Pretty cool.