Cavity filter element for a cavity filter

Patent metadata

Field	Value
Publication number	US-12040524-B2
Application number	US-202217706080-A
Country	US
Kind code	B2
Filing date	Mar 28, 2022
Priority date	Mar 30, 2021
Publication date	Jul 16, 2024
Grant date	Jul 16, 2024

Abstract

An apparatus comprising: at least one cavity filter element wherein the cavity filter element comprises a first support, a second support distinct from the first support, and a coupling element supported by the first support and the second support. In some examples, there is a series of cavity filter elements. In some examples, the cavity filter element(s) are part of a cavity filter.

First claim

I claim:

1. An apparatus, comprising:
a series of cavity filter elements, wherein the cavity filter elements comprise:
a first support, a second support distinct from the first support, and
a coupling element supported by the first support and the second support,
wherein adjacent ones of the cavity filter elements of the series of cavity filter elements are interconnected by conductive interconnects,
wherein the series of cavity filter elements and the conductive interconnects are formed as a single part,
wherein the conductive interconnects extend between and are in contact with adjacent first supports of the cavity filter elements in the series of cavity filter elements, and are separated from contact with the second support of each cavity filter element in the series of cavity filter elements.

2. The apparatus as claimed in claim 1 , wherein
the first support of the cavity filter elements comprises:
a first edge extending from a base, distal from the coupling element, to a top, proximal to the coupling element, and a second edge extending from a base, distal from the coupling element, to a top, proximal to the coupling element;

wherein the second support of the cavity filter elements comprises:
a first edge extending from a base, distal from the coupling element, to a top, proximal to the coupling element, and a second edge extending from a base, distal from the coupling element, to a top, proximal to the coupling element;

wherein the first support and the second support oppose each other across a gap, the first edge of the first support being separated from the first edge of the second support across the gap and the second edge of the first support being separated from the second edge of the second support across the gap.

3. The apparatus as claimed in claim 1 , wherein the first support, the second support and the coupling element of the cavity filter elements are electrically conductive, and a galvanic current path extends via the first support to the second support via the coupling element.

4. The apparatus as claimed in claim 1 , wherein the first support, the second support and the coupling element of the cavity filter elements and the conductive interconnects are formed from a folded sheet of metal.

5. The apparatus as claimed in claim 1 , wherein at least one coupling element of the cavity filter elements comprises a deformable portion that can be deformed for tuning a cavity filter element.

6. The apparatus as claimed in claim 1 , wherein the conductive interconnects are metal interconnects.

7. The apparatus as claimed in claim 1 , wherein the conductive interconnects extend between adjacent first supports of the cavity filter elements.

8. The apparatus as claimed in claim 7 , wherein at least one of the conductive interconnects have different positions along the first supports.

9. The apparatus as claimed in claim 1 , wherein the series of cavity filter elements and the conductive interconnects are formed from a single piece of metal.

10. The apparatus as claimed in claim 1 , wherein the cavity filter elements in the series of cavity filter elements are identical.

11. The apparatus as claimed in claim 1 , comprising:
a first series of cavity filter elements, wherein the cavity filter elements of the first series comprise:
at least a first support, a second support distinct from the first support, and a coupling element supported by the first support and the second support, wherein adjacent ones of the cavity filter elements of the first series of cavity filter elements are interconnected by conductive interconnects, wherein the first series of cavity filter elements and the conductive interconnects are formed as a single part; and
a second series of cavity filter elements, wherein the cavity filter elements of the second series comprise:
at least a first support, a second support distinct from the first support, and a coupling element supported by the first support and the second support; and
at least one conductive cross-coupling interconnect extending between a cavity filter element of the first series and a cavity filter element of the second series,

wherein adjacent ones of the cavity filter elements of the second series of cavity filter elements are interconnected by conductive interconnects, wherein the series of cavity filter elements and the conductive interconnects are foi lied as a single part.

12. The apparatus as claimed in claim 11 , wherein the first series of cavity filter elements are formed from a single piece of metal and wherein the second series of cavity filter elements are formed from a different single piece of metal.

13. The apparatus as claimed in claim 1 , wherein the apparatus is configured as a cavity filter that comprises a conductive housing that provides conductive cavities for the cavity filter elements.

14. An apparatus as claimed in claim 13 , wherein the cavity filter elements are inner conductors to surrounding outer conductive cavities provided by the housing.

15. The apparatus as claimed in claim 13 wherein the cavity filter elements are configured to have an electrical length, from a base of the first support or the second support of the cavity filter element to a top at the coupling element of the cavity filter element, that is substantially one quarter of a resonant wavelength of the cavity filter.

16. The apparatus as claimed in claim 1 , further comprising a transmitter and/or a receiver.

Assignees

• Nokia Solutions & Networks Oy

Inventors

• Karhu Kimmo Kalervo

Classifications

• H01P1/207 Primary

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

• H01P1/2053 Primary

  the coaxial cavity resonators being disposed parall to each other · CPC title

• H01P11/007

  Manufacturing frequency-selective devices (resonators H01P11/008) · CPC title

• H01P1/208 Primary

  Cascaded cavities; Cascaded resonators inside a hollow waveguide structure (H01P1/205 takes precedence) · CPC title