The AD8347 in the passband frequency band, the closer to the center frequency band, the older there is attenuation, the gain is inconsistent, and the height difference is about -9dBm. For what reason, many problems can not be found. Who knows how to enlighten me, thank you！(product address: AD8347ARUZ-REEL7 | Analog Devices Inc. AD8347ARUZ-REEL7 | AD8347ARUZ-REEL7 Stock | OMO Electronic)
Circuit? Layout? What passband? This is a microwave chip, you need to know about microwave circuitry to use it.