Cavity filter

Patent metadata

Field	Value
Publication number	US-11522260-B2
Application number	US-202117229869-A
Country	US
Kind code	B2
Filing date	Apr 14, 2021
Priority date	Oct 15, 2018
Publication date	Dec 6, 2022
Grant date	Dec 6, 2022

Abstract

The present invention relates to a cavity filter and, in particular, provides an advantage of preventing performance deterioration of an antenna device by efficiently absorbing an assembly tolerance which may occur due to assembly design and preventing an interruption of an electrical flow, by comprising: an RF signal connecting part provided to be spaced apart at a predetermined distance from an external member having an electrode pad formed on one surface thereof; a terminal part which electrically connects the electrode pad of the external member to the RF signal connecting part, while absorbing an assembly tolerance existing within the predetermined distance and simultaneously preventing an interruption of an electrical flow between the electrode pad and the RF signal connecting part; a dielectric body which is inserted into a terminal insertion hole so as to surround the outside of the terminal part; and an elastic member which has a portion of the edge supported by the dielectric body and which elastically supports the terminal part by means of an operation in which a hollow part is deformed in the vertical direction when an assembly force is transmitted to the terminal part supported to pass through the hollow part, wherein the terminal part comprises one terminal brought into contact with the electrode pad and the other terminal connected to the RF signal connecting part.

First claim

The invention claimed is:

1. A cavity filter comprising:
an RF signal connector spaced apart at a predetermined distance from an external member having an electrode pad on one surface thereof;
a terminal section configured to electrically connect the electrode pad of the external member to the RF signal connector and to absorb an assembly tolerance existing at the predetermined distance while preventing an interruption of electrical flow between the electrode pad and the RF signal connector;
a dielectric body inserted into a terminal insertion port to surround the terminal section; and
an elastic member having an edge whose portion is supported by the dielectric body, the elastic member being configured to elastically support the terminal section by means of an operation in which a hollow portion of the elastic member is vertically deformed relative to the portion of the edge when an assembly force is applied to the terminal section supported to pass through the hollow portion,
wherein the terminal section comprises:
one terminal coming into contact with the electrode pad; and
another terminal connected to the RF signal connector.

2. The cavity filter according to claim 1 , wherein the terminal section is inserted into the terminal insertion port formed in a filter body having the RF signal connector therein through the dielectric body.

3. The cavity filter according to claim 2 , wherein the dielectric body comprises an upper inner dielectric provided to surround a portion of an outer peripheral surface of the one terminal passing through a terminal installation hole provided as a hollow space, and a lower inner dielectric provided to surround a portion of an outer peripheral surface of the another terminal passing through the terminal installation hole.

4. The cavity filter according to claim 3 , wherein the dielectric body comprises one of a second elastic member installation end formed to be larger than a diameter of a peripheral hole to support the edge of the elastic member, and a first elastic member installation end stepped to be larger than a diameter of the second elastic member installation end.

5. The cavity filter according to claim 4 , wherein the elastic member comprises:
a first elastic member in the form of a disk, the first elastic member comprising a hollow portion, a plurality of outer edges supported by one of the first and second elastic member installation ends, and a plurality of inner edges to which the one terminal of the terminal section is latched; and
a second elastic member in the form of a disk, the second elastic member comprising an elastic part having a hollow portion and a plurality of lower support ends supported by one of the first and second elastic member installation ends, and a boss extending downward from the elastic part so as to surround the outer peripheral surface of the one terminal of the terminal section passing through the hollow portion.

6. The cavity filter according to claim 5 , wherein the first elastic member is configured such that the outer and inner edges are separable by outer cuts, each formed by cutting a predetermined length toward the hollow portion from an outer peripheral surface of the first elastic member, and inner cuts, each formed by cutting a predetermined length toward the outer peripheral surface from the hollow portion, respectively.

7. The cavity filter according to claim 6 , wherein the first elastic member is configured such that the outer edges are bent outward at a predetermined angle with respect to the inner edges.

8. The cavity filter according to claim 5 , wherein the second elastic member is elastically deformable by a plurality of inner elastic cuts circumferentially arranged and each vertically formed around the hollow portion and a plurality of outer elastic cuts circumferentially arranged and each vertically formed around the inner elastic cuts.

9. The cavity filter according to claim 1 , wherein the elastic member is made of one of beryllium copper (BeCu), stainless steel (SUS), and spring steel.

10. The cavity filter according to claim 1 , wherein either of the one terminal and the another terminal comprises a plurality of tension cuts vertically elongated.

11. The cavity filter according to claim 10 , wherein the tension cuts are provided in the one terminal, and an upper end of the another terminal is accommodated in a lower end of the one terminal.

12. The cavity filter according to claim 10 , wherein the tension cuts are provided in the another terminal, and a lower end of the one terminal is accommodated in an upper end of the another terminal.

13. The cavity filter according to claim 10 , wherein the dielectric body supports an outer peripheral surface of the one terminal or the another terminal in which the tension cuts are formed.

14. The cavity filter according to claim 1 , wherein a contact portion of the one terminal of the terminal section, which is in contact with the electrode pad, has a rounded conical shape to have a predetermined contact area at its upper end.

15. The cavity filter according to claim 1 , wherein a contact portion of the one terminal of the terminal section, which is in contact with the electrode pad, has a rounded hemispherical shape to have a predetermined contact area at its upper end.

Assignees

• Kmw Inc

Inventors

• Kim Joung Hoe
• Kim Sang Yoong

Classifications

• H01P1/20

  Frequency-selective devices, e.g. filters · CPC title

• H01R12/91

  allowing relative movement between coupling parts, e.g. floating or self aligning (for coupling devices not specially adapted for printed circuits, flat or ribbon cables, or like generally planar structures, H01R13/6315 takes precedence) · CPC title

• H01P1/207 Primary

  Hollow waveguide filters (H01P1/212, H01P1/213, H01P1/215, H01P1/219 take precedence) · CPC title

• H01P7/06

  Cavity resonators · CPC title

• H01P1/203

  Strip line filters · CPC title