Title:
DIELECTRIC FILTER AND RADIO RECEIVING AND TRANSMITTING DEVICE
Document Type and Number:
WIPO Patent Application WO/2021/169220
Kind Code:
A1
Abstract:
According to a dielectric filter as provided in the present invention, a negative coupling groove is provided at the joint between two dielectric resonator bodies; the negative coupling groove is configured to be a step-shaped blind groove formed by a shallow blind groove and a deep blind groove that are in communication with each other; the shallow blind groove is provided with an opening in the upper surface of a dielectric filter body; the shallow blind groove is also provided with an opening in the front surface and/or the rear surface of the dielectric filter body, the deep blind groove is only provided with an opening in the upper surface of the dielectric filter body; and the groove depth of the deep blind groove in the up-down direction is greater than the groove depth of the shallow blind groove in the up-down direction, such that capacitive coupling between the two dielectric resonators can be achieved by means of the negative coupling groove, and when ceramic materials are sintered at a high temperature, the negative coupling groove has small shape and precision changes, a stable electrical performance, a good structural strength and a high yield. The present invention further provides a radio receiving and transmitting device. The radio receiving and transmitting device comprises the dielectric filter.
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Inventors:
ZHU QI (CN)
ZHOU XINTONG (CN)
ZHOU XINTONG (CN)
Application Number:
PCT/CN2020/112405
Publication Date:
September 02, 2021
Filing Date:
August 31, 2020
Export Citation:
Assignee:
JIANGSU CAIQIN TECH CO LTD (CN)
International Classes:
H01P1/20
Foreign References:
| CN111244589A | 2020-06-05 | |||
| CN110808439A | 2020-02-18 | |||
| CN110391486A | 2019-10-29 | |||
| CN110444849A | 2019-11-12 | |||
| CN110416669A | 2019-11-05 | |||
| US20120212387A1 | 2012-08-23 |
Attorney, Agent or Firm:
SUZHOU CREATOR PATENT AND TRADEMARK AGENCY, LTD (CN)
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