# US 10,873,118 B2 · Tunable filter and tunable filtering device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,873,118 B2 - Document ID: US10873118B2 - Status: Granted - Kind: B2 - Application number: 16/457,786 - Filed: 2019-06-28 - Published: 2019-10-24 - Granted: 2020-12-22 - Earliest claimed: 2016-12-30 - Assignees: Huawei Technologies Co., Ltd. - Applicants: Huawei Technologies Co., Ltd. - Inventors: Hui Wang; Qing Zhao; Guoxiang Cao; Jinyuan Xie - Web page: https://patentgrep.com/patent/US10873118B2 ## CPC - H01P 1/207: Hollow waveguide filters (H01P1/212, H01P1/213, H01P1/215, H01P1/219 take precedence) - H03J 1/08: Toothed-gear drive; Worm drive - H01P 3/12: Hollow waveguides (H01P3/20 takes precedence) - H01P: WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE (operating at optical frequencies G02B) - H03J: TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS ## Abstract 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. ## Claims ### Claim 1 A tunable filter, wherein the tunable filter comprises: a cavity and a filtering component disposed inside the cavity, wherein a first surface of the filtering component is provided with at least one through hole; and the tunable filter further comprises 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, and a cross sectional area of the end of the first adjustable component is greater than or equal to a cross sectional area of the other end of the first adjustable component; 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 a cross sectional area of the end of the second adjustable component is greater than or equal to a cross sectional area of the other end of the second adjustable component; and the drive mechanism controls the at least one first adjustable component to synchronously move, to change a distance between the at least one first adjustable component and the filtering component, and controls the at least one second adjustable component to synchronously move, to change a distance between the at least one second adjustable component and the filtering component. ### Claim 2 (depends on 1) The tunable filter according to claim 1, wherein the drive mechanism comprises two sub drive mechanisms; one of the two sub drive mechanisms is connected to the at least one first adjustable component, and the other sub drive mechanism is connected to the at least one second adjustable component; the sub drive mechanism controls the at least one first adjustable component to synchronously move; and the other sub drive mechanism controls the at least one second adjustable component to synchronously move. ### Claim 3 (depends on 1) The tunable filter according to claim 1, wherein the drive mechanism controls the at least one first adjustable component to synchronously move along a direction perpendicular to the first surface of the filtering component; and the drive mechanism controls the at least one second adjustable component to synchronously move along a direction perpendicular to the first surface of the filtering component. ### Claim 4 (depends on 1) The tunable filter according to claim 1, wherein the tunable filter further comprises at least two third adjustable components that are connected to the drive mechanism, disposed at two ends of the first surface of the cavity, and run through the first surface of the cavity; and the drive mechanism controls the at least two third adjustable components to synchronously move, to change a distance between each of the at least two third adjustable components and the filtering component. ### Claim 5 (depends on 4) The tunable filter according to claim 4, wherein the drive mechanism comprises one sub drive mechanism; the sub drive mechanism is connected to all of the at least one first adjustable component, the at least one second adjustable component, and the at least one third adjustable component; and the sub drive mechanism controls the at least one first adjustable component, the at least one second adjustable component, and the at least one third adjustable component to synchronously move. ### Claim 6 (depends on 1) The tunable filter according to claim 1, wherein the drive mechanism comprises one sub drive mechanism; the sub drive mechanism is connected to both the at least one first adjustable component and the at least one second adjustable component; and the sub drive mechanism controls the at least one first adjustable component and the at least one second adjustable component to synchronously move. ### Claim 7 (depends on 6) The tunable filter according to claim 6, wherein the sub drive mechanism comprises a drive component and a drive rod that are connected by using a fastener; the drive component comprises a drive shaft and a drive rotor; and the drive rod is connected to both the at least one first adjustable component and the at least one second adjustable component; and the drive rotor of the drive component controls the drive shaft of the drive component to rotate, to drive the drive rod to move, so that the distance between the at least one first adjustable component and the filtering component and the distance between the at least one second adjustable component and the filtering component change. ### Claim 8 (depends on 7) The tunable filter according to claim 7, wherein the sub drive mechanism further comprises a fastening component located between the fastener and the drive rotor of the drive component, and at least one anti-wobble apparatus that runs through the fastening component and that is connected to the drive rod. ### Claim 9 (depends on 8) The tunable filter according to claim 8, wherein the sub drive mechanism further comprises at least one elastic apparatus connected to both the fastening component and the drive rod. ### Claim 10 A tunable filtering device, wherein the tunable filtering device comprises a tunable filter, wherein the tunable filter comprises: a cavity and a filtering component disposed inside the cavity, wherein a first surface of the filtering component is provided with at least one through hole; and the tunable filter further comprises 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, and a cross sectional area of the end of the first adjustable component is greater than or equal to a cross sectional area of the other end of the first adjustable component; 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 a cross sectional area of the end of the second adjustable component is greater than or equal to a cross sectional area of the other end of the second adjustable component; and the drive mechanism controls the at least one first adjustable component to synchronously move, to change a distance between the at least one first adjustable component and the filtering component, and controls the at least one second adjustable component to synchronously move, to change a distance between the at least one second adjustable component and the filtering component. ### Claim 11 (depends on 10) The tunable filtering device according to claim 10, wherein the drive mechanism comprises two sub drive mechanisms; one of the two sub drive mechanisms is connected to the at least one first adjustable component, and the other sub drive mechanism is connected to the at least one second adjustable component; the sub drive mechanism controls the at least one first adjustable component to synchronously move; and the other sub drive mechanism controls the at least one second adjustable component to synchronously move. ### Claim 12 (depends on 10) The tunable filtering device according to claim 10, wherein the drive mechanism controls the at least one first adjustable component to synchronously move along a direction perpendicular to the first surface of the filtering component; and the drive mechanism controls the at least one second adjustable component to synchronously move along a direction perpendicular to the first surface of the filtering component. ### Claim 13 (depends on 10) The tunable filtering device according to claim 10, wherein the tunable filter further comprises at least two third adjustable components that are connected to the drive mechanism, disposed at two ends of the first surface of the cavity, and run through the first surface of the cavity; and the drive mechanism controls the at least two third adjustable components to synchronously move, to change a distance between each of the at least two third adjustable components and the filtering component. ### Claim 14 (depends on 13) The tunable filtering device according to claim 13, wherein the drive mechanism comprises one sub drive mechanism; the sub drive mechanism is connected to all of the at least one first adjustable component, the at least one second adjustable component, and the at least one third adjustable component; and the sub drive mechanism controls the at least one first adjustable component, the at least one second adjustable component, and the at least one third adjustable component to synchronously move. ### Claim 15 (depends on 10) The tunable filtering device according to claim 10, wherein the drive mechanism comprises one sub drive mechanism; the sub drive mechanism is connected to both the at least one first adjustable component and the at least one second adjustable component; and the sub drive mechanism controls the at least one first adjustable component and the at least one second adjustable component to synchronously move. ### Claim 16 (depends on 15) The tunable filtering device according to claim 15, wherein the sub drive mechanism comprises a drive component and a drive rod that are connected by using a fastener; the drive component comprises a drive shaft and a drive rotor; and the drive rod is connected to both the at least one first adjustable component and the at least one second adjustable component; and the drive rotor of the drive component controls the drive shaft of the drive component to rotate, to drive the drive rod to move, so that the distance between the at least one first adjustable component and the filtering component and the distance between the at least one second adjustable component and the filtering component change. ### Claim 17 (depends on 16) The tunable filtering device according to claim 16, wherein the sub drive mechanism further comprises a fastening component located between the fastener and the drive rotor of the drive component, and at least one anti-wobble apparatus that runs through the fastening component and that is connected to the drive rod. ### Claim 18 (depends on 17) The tunable filtering device according to claim 17, wherein the sub drive mechanism further comprises at least one elastic apparatus connected to both the fastening component and the drive rod.