Each MAAL-007304 circuit have 25dB of gain, together they have more than 50dB of gain, which is a lot of gain for a 0.5GHz-3GHz amplifier.
When cascading two MAAL-007304 circuits have to rethink the interstage impedance matching network, which will be different than the inp/out matching network recommended in the datasheet by MACOM for a single chip.
Use the provided S-parameters and an RF simulator, and tune for a stable system between 0.5GHz and 3GHz (or maybe even more).
You can decrease a bit the combined gain of the circuit, to improve stability, because I don't think 50dB of gain is mandatory..
Hello,
Thank you for your guidance.
Is it possible to optimize for stability via RF simulator using s2p file (as it is for the linear operation simulation) ?
Please guide.
Hello,In the real circuit, there can be parasitic coupling through shared supply lines, through box resonances etc. None of this is found by circuit simulation.
Hello,Show a photo of your layout and setup.
What is the oscillation frequency?
Have you checked if/where it is "hand sensitive" and changes when you touch DC lines?
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