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AD8302 Eval

Question asked by Medczr on Feb 13, 2014
Latest reply on Feb 13, 2014 by jdobler

Hello,

 

I have a simple question on AD8302 EVAL board. I ordered this device and tested it but it doesn't operate as I expect. I'm using it as a reflectometer as described in the datasheet. The load in my case is a resonator. I know that it resonates at certain frequency and I'm scanning the range 2-2.6GHz. Normally, the device should give constant output voltage(VMAG) except at resonance frequency.

 

I also connected short and open ports as a load instead of resonator. Since there will be full reflection, the output voltage should be nearly constant. However, it gives many peaks for different frequencies in the range I mentioned. How can I correct the problem?

 

Please correct me also if I am wrong anywhere.

Thanks a lot.

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