| 摘要 |
A filter apparatus includes a first conductive signal line configured to form a first radio frequency resonator; a second conductive signal line configured to form a second radio frequency resonator; a cross-coupling element comprising a first electrode arranged to couple capacitively to the first conductive signal line, a second electrode arranged to couple capacitively to the second conductive signal line, and an electrically conductive signal line coupling the first electrode to the second electrode. The cross-coupling element is bendable with respect to the first conductive signal line and the second conductive signal line to adjust the capacitive coupling. |
