Patent ID: 8754738

Claim:
A high-frequency transformer comprising: a first inductance element; and a second inductance element coupled to the first inductance element; wherein the first inductance element includes a first coil element and a second coil element; the first coil element and the second coil element have different coil winding axes and are connected to each other in a direction so as to be coupled to each other in opposite phases; the second inductance element includes a third coil element and a fourth coil element; the third coil element and the fourth coil element have different coil winding axes and are connected to each other in a direction so as to be coupled to each other in opposite phases; the first coil element and the third coil element are arranged such that coil opening surfaces of the first coil element and the third coil element overlap each other in plan view; the second coil element and the fourth coil element are arranged such that coil opening surfaces of the second coil element and the fourth coil element overlap each other in plan view; the first coil element and the second coil element are connected in series to each other; the third coil element and the fourth coil element are connected in series to each other; and the first inductance element and the second inductance element are coupled to each other via a magnetic field and an electric field.