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Reference plane of S-parameter of HMC637ALP5E?

Question asked by HansErik on Nov 7, 2017
Latest reply on Nov 10, 2017 by HansErik

Hi Analog


The S-parameters for the HMC637ALP5E, do they include the drain Bias Tee? ,( see page 9 in the datasheet) 

In other words, does the S-parameters refer to the pins 5 and 21 on the chip, hence the Bias Tee has been de-embedde.  


What is the dimension of the via, below the chip on the eval board?  (see gerber file)


Best Regards