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I also found this government book on measuring transistor scattering

Have a look through these attached app notes from Motorola. ... Larry

If you can find a source for the old Motorola semiconductor app notes, there are a number of them for the RF transistors that give the physical dimensions to build the test fixtures.? On Tue,

I have a copy of HP's app note AN-154. It might cover the S-parameter design you are looking for. It is ancient, 1972, so I would think there are other app notes and more out there. I remember

You might search in some of the VNA-associated notes from HP and Motorola. I no longer have specific references, but I remember specifically, both suppliers addressed the problem with fixture designs.

The maximum frequency sets the resolution in time. The sample interval in frequency determines how long the TDR trace is. Reg

I found some discussion over a year ago, but nothing since. Has anyone done this? I had trouble finding any information on fixture design. Ultimately I settled on biasing the candidate transistor

I am surprised they were not good beyond 1ghz. The smaller geometry, if constructed with care should have made it as easy or easier than making an sma calibration standard. I wonder if a single 50ohm

Some time ago i made a calibration kit using mmcx connectors. I ued 6 female mmcx connectors like these

Jim wrote: # The longest cable is more a function of the step size than the highest frequency. It has to do with ambiguity. Understood. All three of those formulas assume we only have the 101

On 9/22/20 8:00 AM, Jerry Gaffke via groups.io wrote: > John wrote: > # I noticed an interesting effect: If you set the Start frequency at half of the step size > # (say 15MHz to 3000MHz, 101

It would be good for this to be posted to the wiki and/or in a file download location. The questions about how to do TDR measurements one up frequently, and last week we had a very rude and

Thank you, John. The founding concepts you described I was already aware of, but I'm sure they were beneficial to anyone following the post. I was specifically interested in the reasons for the

John wrote: # I noticed an interesting effect: If you set the Start frequency at half of the step size # (say 15MHz to 3000MHz, 101 points), the impedance steps at the first (and every odd) #

Are those the minute connectors used on the teaching board, and, I think on drone circuitry? I thought the drones used 5ghz, an area a bit tricky for home-made standards and somewhat out of the nano

I think "precision" is a bit of an exaggeration there. Several are transitioning from N to SMA, which have very different diameters, so significant shunt capacitance, as a change in transmission line

Hello, I installed nanovna saver on my labtop. My labtop use windows 7 but I installed all drivers for USB connection but the nanovna connect with this port 3 but it don't communicate with nanovna

Hi Kurt, DO you have a view on cal kits for MMCX connectors, or is it ok to cal up to an sma (female) then have a cable SMA male to MMCX socket (female polarity) Thanks Nick

Hi All, Does anyone have experience building the calibration standards for MMCX and MCX antenna connector - sockets? Thanks Nick

Thank you Bryan for your excellent and very explicit document. Jean F5EDP