| 摘要 |
A tunable filter comprises a first waveguide body (10), a second waveguide body (20), a metal plate (30), a tuning member (40), and a driving member (50). The first waveguide body (10) is provided with a first cavity (11). The second waveguide body (20) is provided with a second cavity (21). The metal plate (30) is sandwiched between the first waveguide body (10) and the second waveguide body (20). The metal plate (30) is provided with multiple windows (32). The multiple windows (32) are distributed along the propagation direction of an electromagnetic wave of the tunable filter. The first cavity (11) and the second cavity (21) are in communication and are symmetrically arranged on two sides of the metal plate (30). The tuning member (40) comprises a dielectric pull rod (42) and multiple metal sheets (44) connected to the dielectric pull rod (42). The dielectric pull rod (42) stretches out of the first waveguide body (10) and is connected to the driving member (50). The multiple metal sheets (44) are disposed in the first cavity (11). The multiple metal sheets (44) are disposed corresponding to the multiple windows (32). The driving member (50) drives the tuning member (40) to move relative to the metal plate (30), so as to adjust the frequency of the tunable filter. The tunable filter has good process reliability. |
