Embodiments of the present invention provide a tunable filter and a tunable filtering device. The tunable filter includes: a cavity, a filtering component that is in the cavity and that is provided on a first surface thereof with at least one through hole, a drive mechanism, and at least one first adjustable component and at least one second adjustable component that are connected to the drive mechanism and that run through the first surface of the cavity; one end of one first adjustable component is disposed opposite to one of the at least one through hole; one end of one second adjustable component is disposed opposite to a position between two adjacent through holes in the at least one through hole; and the drive mechanism controls the at least one first adjustable component to synchronously move, and controls the at least one second adjustable component to synchronously move.

An integrated hybrid (active-passive) harmonic impedance tuner uses a fixed and an adjustable directional coupler (wave-probe) and a number of independent wideband tuning probes, all mounted inside the same slabline and housing. The tuning probes are inserted between the fixed and the mobile wave-probes. The fixed wave-probe samples a portion of the forward travelling signal at the fundamental frequency, injects it into a power amplifier and the mobile wave-probe adjusts the phase and amplitude of the amplified signal and injects it back into the slabline towards the DUT. The mobile carriages and tuning probes are automated. The mobile wave-probe is either fully or partially (horizontal only) automated or fully manually controlled. Feedback signal phase and amplitude control is obtained through the horizontal and vertical movement of the mobile wave-probe.

Provided is a bandpass filter (10), including: a filter casing (17) defining a rectangular waveguide (11) having a narrow plane (a) and a broad plane (b); a metal plate (12) having a ladder shape and being arranged in a sandwiched manner inside the filter casing (17) at a center of the broad plane (b) so as to be parallel to the narrow plane (a); a dielectric plate (13) positioned in a vicinity of the metal plate (12); a support rod (14) extending in parallel to a longitudinal direction of the rectangular waveguide (11), the support rod (14) being rotatably supported on the filter casing (17) and configured to support the dielectric plate (13); and a first gear (15) fixed at a tip of the support rod (14). The dielectric plate (13) is rotated along with rotation of the first gear (15), to thereby adjust a bandpass frequency.

Provided is a bandpass filter (10), including: a filter casing (17) defining a rectangular waveguide (11) having a narrow plane (a) and a broad plane (b); a metal plate (12) having a ladder shape and being arranged in a sandwiched manner inside the filter casing (17) at a center of the broad plane (b) so as to be parallel to the narrow plane (a); a dielectric plate (13) positioned in a vicinity of the metal plate (12); a support rod (14) extending in parallel to a longitudinal direction of the rectangular waveguide (11), the support rod (14) being rotatably supported on the filter casing (17) and configured to support the dielectric plate (13); and a first gear (15) fixed at a tip of the support rod (14). The dielectric plate (13) is rotated along with rotation of the first gear (15), to thereby adjust a bandpass frequency.

A new harmonic slide screw impedance tuner for VHF-UHF frequencies uses a reduced overall length spiral slabline structure and three rotating carriages allowing reducing the linear size of the tuner from originally L=3/2 to a spiral length L=2RN of a cylinder with 2R diameter and a height H made up of N floors (example: F=100 MHZ, =300 cm, R=10 cm, N=10 floors of 2 cm each, yields a 2020 cm cylinder versus a 450 cm linear slabline; a core reduction of 450/20=23). The slabline stands vertically on the bench table surface and the carriages, including the tuning probes rotate and wind up and down around a vertical axis through the center of the spiral slabline, controlled by a rack-and pinion spiral arrangement on the edge of the spiral slabline. The rotation of the carriages controls the phase of GAMMA and the insertion of the tuning probes into the channel of the slabline controls its amplitude.

A new harmonic slide screw impedance tuner for VHF-UHF frequencies uses a reduced overall length spiral slabline structure and three rotating carriages allowing reducing the linear size of the tuner from originally L=3/2 to a spiral length L=2RN of a cylinder with 2R diameter and a height H made up of N floors (example: F=100 MHZ, =300 cm, R=10 cm, N=10 floors of 2 cm each, yields a 2020 cm cylinder versus a 450 cm linear slabline; a core reduction of 450/20=23). The slabline stands vertically on the bench table surface and the carriages, including the tuning probes rotate and wind up and down around a vertical axis through the center of the spiral slabline, controlled by a rack-and pinion spiral arrangement on the edge of the spiral slabline. The rotation of the carriages controls the phase of GAMMA and the insertion of the tuning probes into the channel of the slabline controls its amplitude.