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ADL5380 Best balun for the range 4GHz to 5GHz

Question asked by bvlgaro on Jan 26, 2016
Latest reply on Feb 24, 2016 by bvlgaro

Hello,

I'm using the ADL5380 demodulator  for a RF design operating in the range between 4.4GHz -5GHz. I alredy read the discussion "adl5380 matching circuits for RF/LO ports" but the frequency range was larger so I have two questions:

1.Examining the graph in Figure 78 in datasheet  is appropriate to use a balun 50/100 ohms and not 50/50 as those recommended in the datasheet ?

2.Is there a way to get a good RF/LO impedance match with a 50:100 Ohm balun for the ADL5380 in this range (4.4GHz to 5GHz) ?

Due to progect restrictions I cannot use the single-ended configuration proposed in fig.84. Any circuit recommendations or solution would be greatly appreciated.

Best regards and thanks.

 

by Bvlgaro

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