| 摘要 |
PROBLEM TO BE SOLVED: To provide a high frequency filter in which deterioration of passage characteristics at the low-pass edge and the high-pass edge of a wide pass band in a high frequency filter having the wide pass band and an attenuation band with high attenuation close to the pass band. SOLUTION: In the high frequency filter having a notch filter part using a resonator having resonance and antiresonance and a matching circuit part at its input/output part, reactance element values of an input matching circuit part and an output matching circuit part are varied by switching by a switch, etc. and the high frequency filter suitable for the low-pass side and the high-pass side in the wide pass band is applied. COPYRIGHT: (C)2009,JPO&INPIT
|
