| 摘要 |
PROBLEM TO BE SOLVED: To provide a diplexer which has simple circuit constitution, can be made small-sized, and is easy to design. SOLUTION: A 1st transmission line for a 1/4 wavelength at a 2nd frequency is connected between a 1st terminal and a common terminal, and a 2nd transmission line for a 1/4 wavelength at a 1st frequency is connected between a 2nd terminal and the common terminal, and a 1st series resonance circuit which resonates at the 2nd frequency is connected between a 1st-terminal side end of the 1st transmission line and a ground and a 2nd series resonance circuit which resonates at the 1st frequency is connected between a 2nd-terminal side end of the 2nd transmission line and the ground. COPYRIGHT: (C)2006,JPO&NCIPI
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