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HMC5805ALS6 Low Frequency Gain vs Temperature Dependency Reduction

Thread Summary

The user inquired about reducing the temperature dependency of gain peaking around 500 MHz for the HMC5805ALS6. The final answer indicates that the ACG capacitors are necessary for proper operation and that a 1 dB gain variation over temperature is expected behavior. No additional solutions were provided.
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Category: Hardware
Product Number: HMC5805ALS6

HMC5805ALS6 gain vs temperature dependency is relatively large around 500 MHz, where gain peaking occurs.

Are there any suggestions for reducing this temperature dependency?

I tried removing all ACG capacitors, but this makes it worse.

ADI s-parameters at 25C and 85C:

Measured output power of two HMC5805 in series, cold vs hot: