Question regarding components in Advanced Design System
At RF, it is generally preferable to model parasitic behaviour as accurately as possible. A capacitor may look like a capacitor at low frequency but at a few hundred MHz parasitic inductance may actually dominate the device's impedance.

Putting a simple ideal passive model is fine for initial simulations, but before building the amplifier you probably want more accurate models for your sim. Most reputable manufacturers provide SPICE models for their parts which take parasitics into account, and many vendors of RF-specific passives also provide S-parameters. You can import these into ADS to provide a more accurate simulation.

Finally, in the case of a ferrite bead, an inductor alone isn't a great model. An ideal inductor is lossless - it will not absorb energy. In contrast, a ferrite bead is intentionally lossy in order to convert high frequency energy into heat. Fortunately, you should be able to find equivalent circuit models of ferrite beads from most major vendors like TDK and Murata.