Fig. 2: Example of full transmon design.
From: Surface loss calculations and design of a superconducting transmon qubit with tapered wiring
Example design of a differential transmon qubit that incorporates several of the capacitance structures described here. Red shows the junction and tapered wire, blue is a ribbon capacitor, and green is a coplanar capacitor. The outer ground plane is gray. The capacitances and losses would be added to give a good approximation for the entire design.
