Patent ID: 8228154
Filing Date: 2012-07-24
Classification: H01F,H03H,Y10T

Abstract:
1. A wide-band balun device, comprising: a first multi-layered coil formed over a substrate in a wound configuration with first, second, and third portions of the first multi-layered coil including a u-shape and being disposed at different levels with the first portion of the first multi-layered coil being disposed at a first level; a second multi-layered coil formed in a wound configuration with first, second, and third portions of the second multi-layered coil including a u-shape and being disposed at different levels with the first portion of the second multi-layered coil being disposed at a second level over the first level, the first portion of the second multi-layered coil being adjacent and magnetically coupled to the first portion of the first multi-layered coil, the second multi-layered coil being electrically isolated from the first multi-layered coil; a third multi-layered coil formed in a wound configuration including first, second, and third portions of the third multi-layered coil including a u-shape and being disposed at different levels with the first portion of the third multi-layered coil being disposed at a third level over the second level, the first portion of the third multi-layered coil being adjacent and magnetically coupled to the first portion of the second multi-layered coil, the third multi-layered coil being electrically isolated from the second multi-layered coil; and the second portion of the first multi-layered coil being disposed at a fourth level over the third level, the second portion of the first multi-layered coil being adjacent and magnetically coupled to the first portion of the third multi-layered coil, the first multi-layered coil being electrically isolated from the third multi-layered coil.