US 12,444,824 B2
Resonator apparatus, filter apparatus as well as radio frequency and microwave device
Honglan Wang, Beijing (CN); Weidong Wang, Beijing (CN); Jun Fu, Beijing (CN); and Haitao Liu, Beijing (CN)
Assigned to TELEFONAKTIEBOLAGET LM ERICSSON (PUBL), Stockholm (SE)
Appl. No. 17/623,063
Filed by Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
PCT Filed Apr. 17, 2020, PCT No. PCT/CN2020/085411
§ 371(c)(1), (2) Date Dec. 27, 2021,
PCT Pub. No. WO2020/259028, PCT Pub. Date Dec. 30, 2020.
Claims priority of application No. 201920995821.1 (CN), filed on Jun. 28, 2019.
Prior Publication US 2022/0271410 A1, Aug. 25, 2022
Int. Cl. H01P 7/10 (2006.01); H01P 1/20 (2006.01); H04B 1/40 (2015.01)
CPC H01P 7/105 (2013.01) [H01P 1/20 (2013.01); H04B 1/40 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A resonator apparatus comprising:
an electrically conductive case and a dual-mode dielectric resonator provided in the electrically conductive case;
wherein the dual-mode dielectric resonator comprises a first dielectric block having a shape of a columnar body whose cross section is a cruciform;
wherein a mode coupling structure for coupling two resonant modes of the dual-mode dielectric resonator is provided in the columnar body;
wherein a bottom face of the columnar body is supported by an inner face of the electrically conductive case or by a supporting member provided on the inner face of the electrically conductive case;
wherein in at least one extending direction of a first extending direction and a second extending direction of the cruciform which are perpendicular to each other, lateral end faces of the columnar body are spaced apart from inner faces of the electrically conductive case,
wherein the mode coupling structure is a first cylindrical cavity extending from a top face of the columnar body towards the bottom face of the columnar body, and
further wherein
the first cylindrical cavity is disposed at a center of the cruciform,
the first cylindrical cavity has a cross section of a circle, an ellipse, or a polygon, and/or
the first cylindrical cavity has a cross section of an elongated ellipse or an elongated polygon, and an angle between the elongated ellipse or the elongated polygon and the first extending direction or the second extending direction is 45 degrees.