Patent ID: 6563395
Filing Date: 2003-05-13
Classification: H01P,H03F

Abstract:
A balun comprising:a multilayer comprised of dielectric layers and conductor pattern layers stacked alternately; a main line disposed on one of said conductor pattern layers; a plurality of coupling lines each facing a part of said main line, disposed on one or more of said conductor pattern layers different from said conductor pattern layer on which said main line is disposed, so as to be electromagnetically coupled with said facing part of said main line, and grounded electrically respectively; an input line disposed on one of said conductor pattern layers; and output line pairs with respective pairs being connected across corresponding coupling line ends, wherein one end of said main line is connected to said input line, the other end thereof is electrically grounded, the power of a signal input to said input line is split and propagated to each of said output terminal pairs via each of said coupling lines, and a signal propagated from one output line of each said output line pair is 180 degrees out of phase with the other signal propagated from the other output line.