| 摘要 |
An electronic filter includes a first microstrip line hairpin resonator including first and second arms, a first varactor connected between a first end of the first arm and a first end of the second arm of the first microstrip line hairpin resonator, a first capacitor connected between a second end of the first arm and a second end of the second arm of the first microstrip line hairpin resonator, the first and second arms being coupled to provide a first transmission zero, an input coupled to the first microstrip line hairpin resonator, a second microstrip line hairpin resonator including third and fourth arms, a second varactor connected between a first end of the third arm and a first end of the fourth arm of the second microstrip line hairpin resonator, a second capacitor connected between a second end of the third arm and a second end of the fourth arm of the second microstrip line hairpin resonator, the third and fourth arms being coupled to provide a second transmission zero, and an output coupled to the second microstrip line hairpin resonator. A resonator for an electronic filter is also disclosed. The resonator comprises a first microstrip line including first and second arms, a first varactor connected between a first end of the first arm and a first end of the second arm of the first microstrip line, and a first capacitor connected between a second end of the first arm and a second end of the second arm of the first microstrip line, with the first and second arms being coupled to provide a first transmission zero.
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