| 摘要 |
PROBLEM TO BE SOLVED: To configure a parallel multi-stage band pass filter capable of being formed easily with a simpler structure. SOLUTION: A transmission line TL having an electrical length of substantially 1/2 wavelength (λ/2) is connected respectively between the port on the input terminal side of an odd-numbered, (2n-1), resonator and the port on each input terminal side of an even-numbered, (2n), resonator, as seen from an input terminal 1. Also, a transmission line TL having an electrical length ofλ/2 is connected between a port on the the output terminal side of the even-numbered, (2n), resonator and a port on the the output terminal side of the odd-numbered, (2n-1), resonator, as seen from the input terminal 1. A transmission line TLa having an electrical length ofλ/2 is inserted between a first resonator as seen from an output terminal 2, and the output terminal 2 to adjust the transmission phase between the input terminal 1 and the output terminal 2. COPYRIGHT: (C)2004,JPO
|
