Patent ID: 8324981
Filing Date: 2012-12-04
Classification: H01P

Abstract:
1. A composite balun comprising a plurality of baluns, at least one capacitor, a ground terminal, and a DC voltage supply terminal, wherein said plurality of baluns and said capacitor are built into a single chip, each of said baluns includes first to fourth connection lines, a first balanced terminal, a second balanced terminal, and an unbalanced terminal, said first connection line is connected at one end to said unbalanced terminal, said second connection line is connected at one end to the other end of said first connection line, said third connection line is electromagnetically coupled to said first connection line and connected at one end to said first balanced terminal and at the other end to said DC voltage supply terminal, said fourth connection line is electromagnetically coupled to said second connection line and connected at one end to said second balanced terminal and at the other end to said DC voltage supply terminal, said capacitor is connected at one end to said DC voltage supply terminal and led at the other end to said ground terminal, and said capacitor is shared among said plurality of baluns.