Patent ID: 7924112
Filing Date: 2011-04-12
Classification: H01P

Abstract:
1. A balun, comprising: a first metallic layer, having a first conductive pattern; a second metallic layer, comprising: a third metallic layer, comprising: a first dielectric layer, disposed between the second metallic layer and the third metallic layer; a fourth metallic layer, via which the first connection end is electrically connected to the second connection end; a second dielectric layer, disposed between the third metallic layer and the fourth metallic layer; and a dielectric substrate, having a first surface and a second surface opposite one to another, wherein the first metallic layer is disposed on the first surface by thin film processing, and the second metallic layer, the third metallic layer, the first dielectric layer, the fourth metallic layer and the second dielectric layer are disposed on the second surface by thin film processing.