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PSA 4440A: Can the N connector work upto 26.5GHz?

Question asked by stewart_lee on Dec 28, 2007
Latest reply on Jul 4, 2016 by wb0gaz.
I recalled in some HP app notes said that the inner conductor supporting bead of a N connector will absorb/resonate at some dedicated frequencies around 19GHz. Which make the N connector not suitable for the metrology grade measurements upto 20GHz. But the 4440A still uses N connector for the input, does the supporting bead's performance have been improved or there is other reason to use N instead of 3.5mm?