US 12,283,734 B2
Dielectric filter
Feijia Wu, Zhejiang (CN); Yuanyuan Zhang, Zhejiang (CN); Guoyun Shao, Zhejiang (CN); Qin Jiang, Zhejiang (CN); Tengjie Wu, Zhejiang (CN); Shao-Chin Lo, Zhejiang (CN); Kuan-Yu Lu, Zhejiang (CN); and Kai-Nan Hsieh, Zhejiang (CN)
Assigned to JIAXING GLEAD ELECTRONICS CO., LTD., Zhejiang (CN)
Appl. No. 18/273,985
Filed by JIAXING GLEAD ELECTRONICS CO., LTD., Zhejiang (CN)
PCT Filed Mar. 22, 2021, PCT No. PCT/CN2021/081986
§ 371(c)(1), (2) Date Jul. 25, 2023,
PCT Pub. No. WO2022/160432, PCT Pub. Date Aug. 4, 2022.
Claims priority of application No. 202110109585.0 (CN), filed on Jan. 26, 2021.
Prior Publication US 2024/0413513 A1, Dec. 12, 2024
Int. Cl. H01P 1/202 (2006.01); H01P 1/20 (2006.01); H01P 1/205 (2006.01); H01P 3/16 (2006.01)
CPC H01P 1/2002 (2013.01) [H01P 1/202 (2013.01); H01P 1/2056 (2013.01); H01P 3/16 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A novel dielectric filter, comprising:
a dielectric body, provided with an open surface, a short-circuit surface, a top surface, a bottom surface and two side surfaces, wherein an end surface pattern consisting of a hollowed-out area A and an end surface metal layer is formed on the open surface, hollowed-out areas B are respectively arranged on a left side and a right sides of the bottom surface, and the hollowed-out areas B respectively extend to the open surface;
N+4 through holes, wherein N is a natural number not less than 1, the N+4 through holes penetrate through the dielectric body at intervals from left to right, one ends of the through holes are located on the open surface, the other ends of the through holes are located on the short-circuit surface, inner walls of the N+4 through holes are provided with metal layers to form N+4 resonance holes, and the N+4 resonance holes comprise a first resonance hole, a second resonance hole, N middle resonance holes, a penultimate resonance hole and a last resonance hole which are sequentially formed from left to right;
wherein the hollowed-out area A comprises a first sub-frame area surrounding the first resonance hole, a second sub-frame area surrounding the second resonance hole, a penultimate sub-frame area surrounding the penultimate resonance hole, a last sub-frame area surrounding the last resonance hole, and N middle sub-frame areas respectively surrounding the N middle resonance holes;
the end surface metal layer comprises a first metal block, a second metal block, N middle metal blocks, a penultimate metal block, a last metal block, a first metal sideline, a second metal line segment, a third metal line segment, a fourth metal line segment, and a fifth metal line segment; the first metal block, the second metal block, the N middle metal blocks, the penultimate metal block and the last metal block are respectively formed on peripheral sides of the first resonance hole, the second resonance hole, the N middle resonance holes, the penultimate resonance hole and the last resonance hole, and the first sub-frame area, the second sub-frame area, the N middle sub-frame areas, the penultimate sub-frame area and the last sub-frame area are respectively formed on peripheral sides of the first metal block, the second metal block, the N middle metal blocks, the penultimate metal block and the last metal block;
the first metal sideline is arranged at a joint of the open surface, the two side surfaces, the top surface and the bottom surface and is respectively connected to the two side surfaces, the bottom surface and the top surface; the second metal line segment is arranged on a lower side of the open surface corresponding to the first sub-frame area and the second sub-frame area, the third metal line segment is arranged on a lower side of the open surface corresponding to the N middle sub-frame areas, the fourth metal line segment extends to a lower side of an (N+2)th sub-frame area from a lower side of the second sub-frame area, and the fourth metal line segment is arranged above the third metal line segment in parallel and forms a gap with the third metal line segment; the fifth metal line segment is arranged on a lower side of the open surface corresponding to the penultimate sub-frame area and the last sub-frame area;
a grounded metal layer, arranged on an area outside the top surface, the bottom surface, the two side surfaces and the hollowed-out areas B of the short-circuit surface, wherein the grounded metal layer arranged on the short-circuit surface is electrically connected with the metal layers on the inner walls of the N+4 resonance holes to form a short-circuit end, and the N+4 resonance holes are respectively electrically connected with the first metal block, the second metal block, the N middle metal blocks, the penultimate metal block and the last metal block on the open surface to form an open end;
wherein one of the hollowed-out areas B extends to the open surface, and both ends of the one of the hollowed-out area B are respectively connected to the first sub-frame area and the second sub-frame area on the open surface, an other one of the hollowed-out areas B extends to the open surface, and both ends of the other one of the hollowed-out area B are respectively connected to the penultimate sub-frame area and the last sub-frame area on the open surface;
an input electrode, one end thereof being arranged at the one of the hollowed-out areas B, and an other end thereof extending to the open surface to be L-shaped and being connected to the second metal line segment on the open surface, so as to enable the input electrode to connect a signal to the second resonance hole and meanwhile form an external zero point with the first resonance hole; and
an output electrode, one end thereof being arranged at one of the hollowed-out areas B, and the other end thereof extending to the open surface to be L-shaped and being connected to the fifth metal line segment on the open surface, so as to enable the input electrode to connect a signal to the penultimate resonance hole and form an external zero point with the last resonance hole.