| 摘要 |
PROBLEM TO BE SOLVED: To provide a reverse-phase distribution circuit keeping distribution phase difference at about 180°and reducing distribution amplification difference for over a wide frequency band. SOLUTION: The reverse-phase distribution circuit includes: a first transmission line 4 connected between an input terminal 1 and a first output terminal 2 and having 1/4 wavelength of electric length in the center frequency of a predetermined frequency band; a second transmission line 5 connected between the input terminal 1 and a second output terminal 3 and having 3/4 wavelength of electric length in the center frequency; and a third transmission line 6 connected between the first output terminal 2 and the second output terminal 3 and having 1/2 wavelength of electric length in the center frequency. The reverse-phase distribution circuit equalizes the value of characteristic impedance of the first transmission line 4 with that of the second transmission line 5, and makes the value of characteristic impedance of the third transmission line 6 smaller than the values of the characteristic impedance of the first transmission line 4 and the second transmission line 5. COPYRIGHT: (C)2011,JPO&INPIT
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