I found that the datasheet of the adl5521 only has recommended parts for some frequencies. I want to use ADL5521 at 1000MHz, so how should I choose suitable resistors and capacitors?
You need to use the S-Parameter files for the ADL5521. Found here: https://www.analog.com/media/en/simulation-models/s-parameters/ADL5521_de_embedded_s_params_5V_RevB.zip
Then you use…