| 摘要 |
PURPOSE:To simplify the structure, to facilitate the manufacture and to easily realize the filter characteristic with high Q by providing two resonance parts opposite to each other so that the resonance conductor pattern is subject to electric field coupling with a GND pattern. CONSTITUTION:Patterns of 1st, 2nd and 3rd layers 6-1, 6-2, 6-3 form a 1st resonance section and patterns of 4th and 5th layers 6-4, 6-5 form a 2nd resonance section. The two resonance sections are arranged opposite to each other at a prescribed interval so that the GND pattern 2A and the conductor pattern 1A are in electric field coupling. When a high frequency signal is inputted to a feeding point 3 of one of the two resonance parts, the resonance conductor pattern 1A is resonated at a frequency equivalent to lambda/4. Thus, the resonance conductor pattern in the other resonance part is in electric field coupling with the conductor pattern and an output signal passing through the band pass filter is extracted. |
