hussahussien
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Hi for every one actually I am designing a 9.4 GHz amplifier with 2 stages using PFB640, gain 18 dB with bandwidth 300 MHz but the problem I have the design unstable especially at the working frequency I added a resistors on the biasing circuit but it degraded the gain dramatically and I tried to optimized both keeping the gain with reasonable value and the stability factor little more than 1 but it not able to match the goals please I dont have too much time any one could help me and suggest a practical solutions because at the end I have to realize the board