| 摘要 |
PROBLEM TO BE SOLVED: To provide a polarized bandpass filter that improves frequency selectivity of filters, and further miniaturizes circuits. SOLUTION: The polarized bandpass filter consists of a distributed constant circuit having transmission lines. The polarized bandpass filter is provided with: an interdigital type coupled line composed by disposing a pair of transmission lines 3a, 3b of which one end is electrically grounded and the other is electrically opened so that mutual open points approach ground points; a third transmission line 4 for mutually connecting the open points of the interdigital type coupled line to compose the interdigital type coupled line and a closed-loop circuit; and input and output terminals provided at the respective connection points between both the ends of the third transmission line 4 and the interdigital type coupled line. COPYRIGHT: (C)2010,JPO&INPIT
|
