CST Microwave Studio Differential Microstrip Transmission Line

Hello All,

I am new to Electromagnetic simulation; I want to simulate a Differential Microstrip transmission line to know if there is any impedance discontinuity and have some Questions:
1- I am using waveguide ports, is there anyway to add a differential waveguide port?
2- is there a way to cross probe between TDR plot and the transmission line?

Thank you in advance,

Ballimo