modelling hxtr3675 under ADS?

AFTER I DEFINE S PARAMETER MODEL OF THAT AMP,HOW I MAKE MODEL TO IT IN SCHEMATIC WINDOWS TO SIMULATE S PARAMETERS AND NOISE AND GAIN CIRCLES
HERE THE S PARAMETER OF IT

It's easy if you have a file of the s-parameters. Just create the 2-port s-par block and point to the file. then either use the the network analyzer tool an connect to the block or use the spar analysis like you would any other analysis like HB..etc.

MoonShine

enable noise simulation in the S-parameter controller for noise simulation...