Hi Analog Device Team,
I bought the RF Power Amplifier HMC7229 and design a Roger 4003c PCB, after I have mounted the Chip on the PCB, together with the bypass capacitors, I measure the module with Network Analyzer, I could only get low gain of 12 dB instead of 24 dB and the Chip is very hot. I have tried many chip but it is still the same.
I use the Supply voltage as 5.3 V and gate voltage of -0.8 V to get 1.2 A. But the gain is low I do not know why.
But S11 and S22 can obtain < -10 dB
I have also designed the suggestion circuit in datasheet for Vref and Vdet, but it does not help.
Could the Team figure out my problem?