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As the "adapter removal" technique proprietry to Keysight, or public?

Question asked by drkirkby on Oct 1, 2015
Latest reply on Oct 4, 2015 by drkirkby

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I believe that the "adapter removal", described in application note 8510-13, which is an incredibly tedious process to take out the effect of adapters, has largely been replaced by unknown thru developed by Ferrero and Pisani

http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=173410

But does anyone know if the algorithm for adapter removal was ever published, or is it proprietary HP/Agilent/Keysight information? Googling only seems to find references to HP/Agilent/Keysight, but it might have been published in an IEEE journal or similar.

Dave

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Dr_joel

Oct 3, 2015 8:43 PM

The adapter removal method is identical to that published in section 9.3.1 of the "Handbook of Microwave Component Measurements".

BTW, missed you at Bletchley Park.

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drkirkby @ Dr_joel on Oct 4, 2015 1:57 AM

> {quote:title=Dr_joel wrote:}{quote}
> The adapter removal method is identical to that published in section 9.3.1 of the "Handbook of Microwave Component Measurements".

Cheers. I will point it out to someone who is interested in implementing it on a home-brew VNA.

> BTW, missed you at Bletchley Park.

Yes, I was rather hoping to see you too - one of the main reasons for going! But something came up at this end. I did contact Keysight in advance though, so my name should have been removed from the list of attendees.

I guess there are are so many ways you can develop pure S-parameters measurements on a VNA, but your PNA-X's go *well* beyond S-parameters. Shame I can't afford one!

The Keysight seminars are quite good - I always seem to learn something. One conversation I had with someone from Virgina Diodes was particularly interesting at one of the Keysight seminars.

I recall hearing on an amateur radio list about people combining the output of two X-band Gunn diode modules with a magic-T and getting more power out than the sum of the two individual powers - i.e. get something like 30 mW from two Gunn diode modules each producing 10 mW. There had been more than one report of this, and as much as it seemed improbable, I was not totally convinced it was crazy, so I could not resist discussing this with a couple of Gunn diode experts at the Keysight seminar.

* One was an academic at a Scottish university who was making Gunn diodes at THz frequencies. He dismissed it as utter rubbish.
* The other was a guy from Virgina Diodes who was not surprised at all. He basically said that by putting the diodes in a Magic-T, one has completely changed the cavity the diodes are operating in, so one should not be too surprised if they operate in a different mode in a totally different cavity.

Hope to see you some other time you are in the UK.

Dave

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Dr_joel Oct 3, 2015 8:43 PM
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The adapter removal method is identical to that published in section 9.3.1 of the "Handbook of Microwave Component Measurements".

BTW, missed you at Bletchley Park.
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- drkirkby @ Dr_joel on Oct 4, 2015 1:57 AM
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  > {quote:title=Dr_joel wrote:}{quote}
  > The adapter removal method is identical to that published in section 9.3.1 of the "Handbook of Microwave Component Measurements".
  
  Cheers. I will point it out to someone who is interested in implementing it on a home-brew VNA.
  
  > BTW, missed you at Bletchley Park.
  
  Yes, I was rather hoping to see you too - one of the main reasons for going! But something came up at this end. I did contact Keysight in advance though, so my name should have been removed from the list of attendees.
  
  I guess there are are so many ways you can develop pure S-parameters measurements on a VNA, but your PNA-X's go *well* beyond S-parameters. Shame I can't afford one!
  
  The Keysight seminars are quite good - I always seem to learn something. One conversation I had with someone from Virgina Diodes was particularly interesting at one of the Keysight seminars.
  
  I recall hearing on an amateur radio list about people combining the output of two X-band Gunn diode modules with a magic-T and getting more power out than the sum of the two individual powers - i.e. get something like 30 mW from two Gunn diode modules each producing 10 mW. There had been more than one report of this, and as much as it seemed improbable, I was not totally convinced it was crazy, so I could not resist discussing this with a couple of Gunn diode experts at the Keysight seminar.
  
  * One was an academic at a Scottish university who was making Gunn diodes at THz frequencies. He dismissed it as utter rubbish.
  * The other was a guy from Virgina Diodes who was not surprised at all. He basically said that by putting the diodes in a Magic-T, one has completely changed the cavity the diodes are operating in, so one should not be too surprised if they operate in a different mode in a totally different cavity.
  
  Hope to see you some other time you are in the UK.
  
  Dave
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As the "adapter removal" technique proprietry to Keysight, or public?

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