[time-nuts] HP 5065A super
jimlux at earthlink.net
Thu Feb 22 21:15:38 EST 2018
On 2/22/18 12:29 PM, Leo Bodnar wrote:
> Here is ENIG fact that is not widely known at the moment but which some might find useful.
> I could not understand why I get better TDR and insertion loss results from solder-mask covered microstrip transmission lines than from otherwise identical microstrips on the same substrate with soldermask removed and, therefore, covered with ENIG.
> Gold can't be bad, right? As it turns out, even gold coin has two sides to it.
> I have found that Shlepnev and McMorrow conducted extensive research and published data, some of which is presented here http://www.simberian.com/Presentations/NickelCharacterizationPresentation_emc2011.pdf
the ever useful http://www.microwaves101.com/ site has an excellent
discussion of this under the "skin effect" heading.
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