| 摘要 |
PROBLEM TO BE SOLVED: To obtain a microwave phase shift circuit having a simple configuration and capable of generating two differential high-frequency signals having same amplitude as and 45°phase difference from a differential high-frequency signal as an input signal. SOLUTION: The circuit is provided with an 8-phase polyphase filter 100 for distributing and outputting a differential high-frequency signal as an input signal to eight frequency signals, i.e. first to eighth having the same amplitude and 45°phase difference; and output signal generating circuits 200, 210, 220 and 230 for generating two differential high-frequency signals having the same amplitude and 45°phase difference as an output signal on the basis of the eight high-frequency signals distributed and outputted from the 8-phase polyphase filter. COPYRIGHT: (C)2009,JPO&INPIT
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