Compact integrated rotary joint with a resonant shield

A rotary joint comprising

• a first part and a second part, the second part configured to rotate around a rotation axis against the first part,
• wherein the first part includes at least one first magnetic core, the second part includes at least one second magnetic core configured for coupling power with the at least one first magnetic core,
• wherein a first winding is within the at least one first magnetic core, and a second winding is within the at least one second magnetic core, the first winding and the second winding are magnetically coupled with each other through the at least one first magnetic core and the at least one second magnetic core,
• wherein a circular air gap is formed between the at least one first magnetic core and the at least one second magnetic core,
• wherein at least one resonant shield is provided outside one or more of the at least one first magnetic core and the at least one second magnetic core and outside of the airgap, and
• wherein the at least one resonant shield comprises an open ring shaped structure having two open ends, the two open ends being connected by a capacitor to form a resonant circuit.