| 摘要 |
PROBLEM TO BE SOLVED: To provide a radio frequency filter having a cavity structure, which can be further miniaturized and lightweight.SOLUTION: The radio frequency filter having a cavity structure includes: a housing which has a hollow inner portion and a cavity that is cut off from the outside, and a resonance element which is placed in the hollow inner portion of the housing, wherein the housing has a wrinkled structure for adjusting intervals between a longitudinal front end surface of the resonance element and an inner surfaces of the housing facing the longitudinal front end surface using external pressure. Thus, the filter can be further miniaturized and lightweight, and the design of the filter allows for frequency tuning without employing a coupling structure of a tuning screw and a fastening nut, thereby the radio frequency filter can has a convenient and simplified structure.SELECTED DRAWING: Figure 1 |
