| 摘要 |
An embodiment filter including metallic plating unitarily forming a spherical shell and a resonator, the resonator defining a resonator cavity, a tuning nut disposed in a lower portion of the resonator cavity, and a tuning screw threadably secured within the resonator cavity by the tuning nut, the tuning screw rotatable to deform an upper portion of the resonator to tune the filter. |
