| 摘要 |
PROBLEM TO BE SOLVED: To provide a 90°distributor and a high frequency circuit to which a wide band and high phase precision are required. SOLUTION: A 90°distributor comprises a two-phase input and four-phase output frequency divider 11 and a four-phase input and four-phase output polyphase filter 12 which inputs a four-phase outputted from the frequency divider 11. By using the frequency divider 11 on a pre-stage, a wide band is achieved and by providing the four-phase input and four-phase output PPF 12 on a post-stage of the frequency divider 11 so as to fetch the four-phase output of the frequency divider 11 and correcting a distribution/phase error, high-phase precision is achieved together with the correction. COPYRIGHT: (C)2007,JPO&INPIT
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