arXiv:2611.14416v1 Announce Type: new Abstract: The traditional Voltage Source Inverter (VSI) based Dual Active Bridge (DAB) utilizes a transformer at its center to provide galvanic isolation and a turns ratio for step up/down functionality. However, the transformer is often the limiting factor of the DAB, especially as semiconductor switching speeds improve, given steel core losses, winding losses, etc. This paper presents a new DAB architecture based on Current Source Inverters (CSIs) coupled through, and isolated by, an AC capacitive bridge, yielding a system called a Capacitive Bridge Transformer (CBT). The CBT architecture eliminates all magnetic components in the AC portion of the isolated DAB circuit, reducing frequency scaling barriers normally present in DABs. The paper introduces the CBT from the perspective of duality and then develops the DC-DC power flow equations, the internal apparent power equations, and effective turns ratio. The analytical models are verified by steady state and detailed time domain measurements on a 2 kW experimental prototype.