Abstract: An inductor structure includes a first quadrupole inductor, and a second quadrupole inductor, wherein the second quadrupole inductor overlaps the first quadrupole inductor. In certain aspects, the inductor structure may be included in a filter, which may also include one or more capacitors coupled to the inductor structure.

Abstract: An inductor structure has a first terminal and a second terminal, and includes a conductor path between the first terminal and the second terminal. The conductor path includes a first inductor, a second inductor, a third inductor, a fourth inductor, a fifth inductor, and a sixth inductor. The conductor path may be configured such that, when a current flows from the first terminal to the second terminal, the current flows in a first direction in the first inductor, the third inductor, and the fifth inductor, and the current flows in a second direction in the second inductor, the fourth inductor, and the sixth inductor. The first direction may be clockwise and the second direction may be counterclockwise, or vice versa.