US 12,464,633 B2
Manufacturing method for radio-frequency cavity resonators and corresponding resonator
Günther Dollinger, Garching (DE); and Michael Mayerhofer, Munich (DE)
Assigned to UNIVERSITÄT DER BUNDESWEHR MÜNCHEN, Neubiberg (DE)
Appl. No. 18/005,863
Filed by Universität der Bundeswehr München, Neubiberg (DE)
PCT Filed Jul. 9, 2021, PCT No. PCT/EP2021/069180
§ 371(c)(1), (2) Date Jan. 18, 2023,
PCT Pub. No. WO2022/017833, PCT Pub. Date Jan. 27, 2022.
Claims priority of application No. 20187438 (EP), filed on Jul. 23, 2020.
Prior Publication US 2023/0300969 A1, Sep. 21, 2023
Int. Cl. H05H 7/18 (2006.01); H05H 9/04 (2006.01)
CPC H05H 7/18 (2013.01) [H05H 9/042 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A method of manufacturing a radio frequency cavity resonator, wherein said radio frequency cavity resonator comprises:
a tubular structure extending along a longitudinal axis, said tubular structure comprising a circumferential wall structure surrounding said longitudinal axis;
one or more tubular elements arranged within said tubular structure, each having a bore and arranged such that the respective bore is aligned with said longitudinal axis of said tubular structure; and
a first and a second support structure associated with each of said tubular elements, wherein said first and second support structures are provided on opposite sides of each tubular element and include one or more edges which extend radially along a diameter of the tubular structure between the tubular element and a corresponding one of two opposite wall structure portions of said tubular structure, wherein:
the method comprises producing the entire resonator, or at least longitudinal sections thereof that are subsequently assembled to form the resonator, by additive manufacturing in a manufacturing direction that is parallel to said diameter, wherein said first support structure is produced first and said second support structure is produced thereafter;
said additive manufacturing comprises forming said support structures such that:
in a cross-sectional plane that is perpendicular to the longitudinal axis and includes the diameter, the width of at least said second support structure increases in radially outward direction, wherein in this cross-sectional plane, said width is the width in a direction perpendicular to the diameter of the tubular structure and such that in said cross-sectional plane, the edges of said second support structure have an average angle α with respect to the diameter that is at least 25°; and
in a longitudinal sectional plane that includes the longitudinal axis and the diameter, at least said second support structure is formed to have a radially outer portion, in which the width increases in radially outward direction, wherein in this longitudinal sectional plane, said width is the width in longitudinal direction.