| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a high frequency hybrid circuit which is downsized and has band-pass characteristics (band limiting characteristics in opposite phase terminal output especially). Ž<P>SOLUTION: The high frequency hybrid circuit has: first to fourth terminals; a first circuit element connected between the first terminal and the second terminal; a second circuit element connected between the first terminal and the third terminal; and a third circuit element connected among the second terminal, the third terminal and the fourth terminal. Wherein, the first circuit element and the second circuit element are both 1/4 wavelength line, and the third circuit element is an interdigital BPF. The interdigital BPF is provided with a first filter terminal connected to the fourth terminal and capable of inputting (or outputting) signals, a second filter terminal connected to the second terminal and capable of outputting (or inputting) the signals, and a third filter terminal connected to the third terminal and capable of outputting (or inputting) the signals of the phase opposite to output signals from the second filter terminal (or input signals to the second filter terminal). Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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