I have seen many applications where micro-coax is used for differential signals. For example display panels with LVDS or eDP, and a I-PEX VS type connector. The I-PEX connector even names USB4, HDMI etc. in its applications.
But how do you get the right differential impedance, if you run each of the signals in a separate coaxial cable?
While doing some research I came across the term twinax, which is coax with dual inner conductors. Is that what is usually used, or can you run a differential signal in two coaxial cables?
I found this "Micro coaxial Connectors Handbook" stating for example LVDS as typical use case for micro-coaxial cable.