US 12,294,149 B2
Radiofrequency window
Ian Shinton, Crawley (GB); and Emma Wooldridge, Crawley (GB)
Assigned to Elekta Limited, Crawley (GB)
Appl. No. 17/595,888
Filed by Elekta Limited, Crawley (GB)
PCT Filed May 29, 2020, PCT No. PCT/EP2020/065004
§ 371(c)(1), (2) Date Nov. 29, 2021,
PCT Pub. No. WO2020/239989, PCT Pub. Date Dec. 3, 2020.
Claims priority of application No. 1907809 (GB), filed on May 31, 2019.
Prior Publication US 2022/0231421 A1, Jul. 21, 2022
Int. Cl. H01Q 13/18 (2006.01); H01P 1/08 (2006.01)
CPC H01Q 13/18 (2013.01) [H01P 1/08 (2013.01)] 19 Claims
OG exemplary drawing
 
1. An RF window comprising:
a first cavity;
a second cavity; and
a plate of dielectric material positioned between the first cavity and the second cavity, wherein at least one of the first cavity or the second cavity comprises a taper such that the at least one of the first cavity or the second cavity reduces in diameter in a direction away from the plate of dielectric material, and wherein the taper begins at the plate, wherein the taper is a first taper of the first cavity, wherein the direction is a first direction, wherein the second cavity comprises a second taper such that the second cavity reduces in diameter in a second direction away from the plate of dielectric material, and wherein at least one of: a length of the first cavity along the first direction is less than a radius of the plate, or a length of the second cavity along the second direction is less than a radius of the plate of dielectric material.