Thread: Port Extension / De-embedding

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	Replies: 1 - Pages: 1 - Last Post: Apr 24, 2012 12:40 PM Last Post By: Andrew MEI	Threads: [ Previous \| Next ]

Andrew MEI

Posts: 2
Registered: 01/12/11

Port Extension / De-embedding
Posted: Jan 13, 2011 2:56 PM

Hi,

I am trying to measure the permittivity and permeability for PTFE blocks in the X-band frequency range.

I used TRL calibration for my waveguide based measurement. I am wondering how should I apply port extension OR de-embedding to eliminate the errors that caused by the sample holder.
For example, my sample holder is about 23mm long ( x-band waveguide), and my sample is about 6mm in thickness and it is placed in the sample holder tightly. How much (in length) do i have to extend for both ports?

Also, do i have to put my sample in the middle of the waveguide?

By the way, I am using PNA E8362C for the measurement.

Best Regards,
Andrew

Andrew MEI

Posts: 2
Registered: 01/12/11

Re: Port Extension / De-embedding
Posted: Jan 13, 2011 6:24 PM

in response to: Andrew MEI

Hi,

I did the measurement without port extension/De-embedding, with the PTFE in the middle of the waveguide, the permittivity of PTFE (using NRW method) i got varies with frequency. from 2.4@ 8.4GHz to1.6 @ 12GHz.

I am wondering if the De-embedding will cause such a big problem on the result or maybe there is something wrong with my calibration?

Thanks,

Andrew

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