| 摘要 |
PROBLEM TO BE SOLVED: To obtain a phase shift circuit for a reflection-type phase shifter in which variations in phase shift amount are reduced over a wide band, and the reflection-type phase shifter using the same. SOLUTION: The phase shift circuit is provided with first/second high-frequency lines whose each one end is connected to an input/output terminal, a first capacitor whose one end is grounded, and whose the other end is connected to the other end of the first high-frequency line; and a second capacitor whose one end is grounded, and whose the other end is connected to the other end of the second high-frequency line via a switching element. The phase shift circuit reflects a signal inputted from the input/output terminal while imparting a phase shift to the signal on the basis of the state of the switching element. COPYRIGHT: (C)2008,JPO&INPIT
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