US 12,424,717 B2
Frequency adjustable filter
Efstratios Doumanis, Helsinki (FI); Jaakko Petteri Vuorio, Espoo (FI); Kari Johannes Hautio, Espoo (FI); and Oskari Amper, Klaukkala (FI)
Assigned to Nokia Solutions and Networks Oy, Espoo (FI)
Filed by Nokia Solutions and Networks Oy, Espoo (FI)
Filed on Mar. 1, 2023, as Appl. No. 18/116,029.
Claims priority of application No. 20220100196 (GR), filed on Mar. 3, 2022.
Prior Publication US 2023/0291084 A1, Sep. 14, 2023
Int. Cl. H01P 7/04 (2006.01); H01P 1/205 (2006.01); H01P 1/207 (2006.01); H01P 7/06 (2006.01)
CPC H01P 1/207 (2013.01) [H01P 1/205 (2013.01); H01P 7/04 (2013.01); H01P 7/06 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A frequency adjustable filter comprising at least a housing, which comprises one or more cavities closed with a lid above the housing, the frequency adjustable filter comprising, per a cavity forming a resonator, at least:
a first resonator element extending from the lid towards a bottom of the cavity on an opposite side of the lid;
a second resonator element extending from the bottom towards the lid, the second resonator element partially overlapping the first resonator element;
an adjusting bar extending inside an area in which the first resonator element and the second resonator element are overlapping, the adjusting bar being arranged to move within said area;
a first hole in the lid;
a driving shaft; and
an actuator arranged to move the adjusting bar through the first hole with the driving shaft,
wherein at least the first resonator element, the second resonator element and the adjusting bar are positioned to have a common vertical central axis;
further comprising per the cavity forming the resonator, a support structure attached to the lid, arranged on the upper surface of the lid above the cavity, wherein
the driving shaft is fixedly attached to the support structure;
the actuator is a movable actuator arranged to move along the driving shaft; and
the adjusting bar is attached to the actuator to move as the actuator move.