ADL5610 input

Hi

I have connected output of balun to ADL5610 without ac coupled capacitor, in input of ADL5610 i am getting -15dBm power at 5 GHz

But surprisingly in output i am getting -22dBm instead of 0dBm.

What may be the issue?

I have checked bias at output and it is coming 5V.

Regards

anki