poor swr

Everyone,

I am having a few issues with the Rx side of the FDM system.

Configuration:


Input --------- Combined Channels ----------->

1-to-8 Divider ------> Filter (each output)

---------> Amplifier (each output) ----------> Mixer -------> Filter (Each output)

------> Output (Individual Channels)

I get like a 7:1 SWR at the input side. (Used a PNA 1-port measurement)

Any thoughts on the Rx configuration that can help with a better results. The individual components are good on paper but as a system I am seeing issues.

Any way to get a closer to 1:1 SWR at the input? Recommendations on what to measure is also welcomed.

Thanks.