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EVAL01-HMC1084LC4 : Measurement

Question asked by subinnarayanan on Apr 11, 2017


I am measuring the return loss at common port of the switch (RFC) with RF1- RFC path is activated. Return loss at RFC is -2 dB for frequencies 23 GHz - 26 GHz which is quite different from what is given in datasheet. Then I looked at the impedance (Resistance) between the central pin and outer conductor of the 2.92 mm connector at RFC and shows it is short circuited. I checked the impedance at all other ports also,which also gives me zero resistance. I was wondering whether it should be like that? If yes what is the reason?

In addition to this insertion loss for all ports are -15 dB , which is also different from datasheet.

Looking forward to hear from you soon,

Kind regards,
Subin Narayanan