Summing tow hight frequency signals 80mhz bandwidth

Hi everyone,

I’m working on a project that requires summing tow hight frequency signals 80mhz bandwidth

The goal is to add noise to a analog reflected signal i tried Op amplifier the Ths4630 by making it a non inverter adder circuit but it didn’t work

I also tried ad8130 ic also didn’t work work . Please if someone have an idea how to perform such a application let me know

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