LAMINATED BALUN TRANSFORMER

摘要

PROBLEM TO BE SOLVED: To provide a laminated balun transformer which can apply bias current to only a transmission line. SOLUTION: Lines 24 and 27 are serially connected with each other through a relay terminal 43 to form a unbalanced transmission line. Lines 25 and 28 are electromagnetically coupled as a coupler. Similarly, lines 27 and 28 are electromagnetically coupled as a coupler. A ground terminal G1 is connected to the unbalanced transmission line comprised of lines 25 and 28. On the other hand, a shield terminal G2 is connected to leading parts 30a-32a of shield electrodes 30-32. These two terminals G1 and G2 are electrically independent.