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- Nachgewiesen in: USPTO Patent Grants
- Sprachen: English
- Patent Number: 11955,682
- Publication Date: April 09, 2024
- Appl. No: 17/789416
- Application Filed: December 30, 2020
- Assignees: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL) (Stockholm, SE)
- Claim: 1. A ceramic waveguide filter, comprising a body that is made of ceramic and has a plurality of resonators each including a blind hole, the blind holes of two of the resonators opening at a first surface of the body and extending toward an opposite second surface of the body, and wherein capacitive coupling between the two resonators is achieved by a coupling structure on/in a substrate to which the body is attached at the side of the second surface.
- Claim: 2. The ceramic waveguide filter according to claim 1 , wherein a metalized groove is provided on the second surface of the body at respective positions that correspond to the two resonators, to which the coupling structure is connected via a soldering pad.
- Claim: 3. The ceramic waveguide filter according to claim 1 , wherein a metal pin is provided on the second surface of the body at respective positions that correspond to the two resonators, by means of which the coupling structure is connected to the body.
- Claim: 4. The ceramic waveguide filter according to claim 1 , wherein a soldering pad is provided on the second surface of the body at respective positions that correspond to the two resonators, to which the coupling structure is connected.
- Claim: 5. The ceramic waveguide filter according to claim 1 , wherein the ceramic waveguide filter further comprises the substrate, wherein the substrate is a printed circuit board or made of plastic on which the coupling structure is formed.
- Claim: 6. A radio unit, comprising a ceramic waveguide filter according to claim 1 , and the substrate to which the body of the ceramic waveguide filter is attached.
- Claim: 7. The radio unit according to claim 6 , wherein the substrate is a radio mother board or a low pass filter board.
- Claim: 8. The radio unit according to claim 6 , wherein the coupling structure is a transmission line, a parallel coupler, an interdigital coupler, or a broadside strip line coupler on/in the substrate.
- Claim: 9. The radio unit according to claim 6 , wherein the substrate is made of plastic, and the coupling structure is a metal layer that is integrally formed on the substrate by plating on plastic.
- Claim: 10. A base station comprising a radio unit according to claim 6 .
- Claim: 11. The base station according to claim 10 , wherein a metalized groove is provided on the second surface of the body at respective positions that correspond to the two resonators, to which the coupling structure is connected via a soldering pad.
- Claim: 12. The base station according to claim 10 , wherein a metal pin is provided on the second surface of the body at respective positions that correspond to the two resonators, by means of which the coupling structure is connected to the body.
- Claim: 13. The base station according to claim 10 , wherein a soldering pad is provided on the second surface of the body at respective positions that correspond to the two resonators, to which the coupling structure is connected.
- Claim: 14. An antenna unit, comprising a ceramic waveguide filter according to claim 1 , and the substrate to which the body of the ceramic waveguide filter is attached.
- Claim: 15. The antenna unit according to claim 14 , wherein the substrate is an antenna calibration board or an antenna power splitter board.
- Claim: 16. The antenna unit according to claim 14 , wherein the coupling structure is a transmission line, a parallel coupler, an interdigital coupler, or a broadside strip line coupler on/in the substrate.
- Claim: 17. The antenna unit according to claim 14 , wherein the substrate is made of plastic, and the coupling structure is a metal layer that is integrally formed on the substrate by plating on plastic.
- Claim: 18. The antenna unit according to claim 14 , wherein a metalized groove is provided on the second surface of the body at respective positions that correspond to the two resonators, to which the coupling structure is connected via a soldering pad.
- Claim: 19. The antenna unit according to claim 14 , wherein a metal pin is provided on the second surface of the body at respective positions that correspond to the two resonators, by means of which the coupling structure is connected to the body.
- Claim: 20. The antenna unit according to claim 14 , wherein a soldering pad is provided on the second surface of the body at respective positions that correspond to the two resonators, to which the coupling structure is connected.
- Patent References Cited: 5831497 November 1998 Yorita ; 11271277 March 2022 Zhang ; 11437691 September 2022 Jing ; 20030090344 May 2003 Wang et al. ; 20100001815 January 2010 Ermutlu et al. ; 20150207193 July 2015 Cuadras et al. ; 20160094265 March 2016 Yuan ; 20220359966 November 2022 Jian ; 208622916 March 2019 ; 110098456 August 2019 ; 110137638 August 2019
- Other References: Cao, Liangzu, et al., “Tuning Properties of Dielectric Ceramic Filters”, Journal of Ceramics, vol. 38, No. 6, Dec. 1-5, 2017. cited by applicant ; “3-Dimensional Circuitry Laser Direct Structuring Technology (LPKF-LDS) for Moulded Interconnect Devices”, LPKF Laser & Electronics, XP055257222, Nov. 21, 2014, 12 pages. cited by applicant
- Primary Examiner: Jones, Stephen E.
- Attorney, Agent or Firm: Murphy, Bilak & Homiller, PLLC
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