| 摘要 |
PROBLEM TO BE SOLVED: To provide a balun circuit with a desirable characteristic even if a characteristic of a coupled line is not an ideal one. SOLUTION: A coupled line 105 is structured with a first transmission line 103 and a second transmission line 104 positioned as a close pair, and aπ-shaped circuit 108 is structured with a third transmission line 106 one end of which is connected to a first short-circuiting stub 107a while the other end of which is connected to a second short-circuiting stub 107b. One end of the first transmission line 103 is set to be an unbalanced terminal 101, and the other end thereof is connected to theπ-shaped circuit 108 to be one side of a balanced terminal 102a. One end of the second transmission line 104 is short-circuited, while the other end is set to be a balanced terminal 102b. COPYRIGHT: (C)2005,JPO&NCIPI
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