Can AWR set a term without ref GND?

In ADS, we can set Term without ref GND, such as the following picture. The term is connected to a differential circuit directly.
But in AWR, the port only has one pin. Does AWR have two pins for one port?

You can use AC Source with a terminating resistance.

If you want an ungrounded differential signal, you can also use the "MMCONV" element. This has 2 inputs/outputs for common mode & differential, and 2 terminals on the other side.

thank you very much.