US 12,148,972 B2
RF device comprising plural transition units arranged in two or more offset rows for coupling differential transmission line pairs to hollow waveguides
Alexander Gäbler, Darmstadt (DE)
Assigned to BEIJING BOE SENSOR TECHNOLOGY CO., LTD., Beijing (CN)
Appl. No. 17/761,132
Filed by BEIJING BOE SENSOR TECHNOLOGY CO., LTD., Beijing (CN)
PCT Filed Sep. 18, 2020, PCT No. PCT/EP2020/076124
§ 371(c)(1), (2) Date Mar. 16, 2022,
PCT Pub. No. WO2021/053153, PCT Pub. Date Mar. 25, 2021.
Claims priority of application No. 19198157 (EP), filed on Sep. 18, 2019.
Prior Publication US 2022/0407209 A1, Dec. 22, 2022
Int. Cl. H01P 5/107 (2006.01); H01P 3/08 (2006.01); H01P 3/12 (2006.01)
CPC H01P 5/107 (2013.01) [H01P 3/08 (2013.01); H01P 3/12 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A radio frequency device (1) with a transition unit (2) providing a transition from a planar differential pair transmission line (7) to a hollow radio frequency waveguide (15, 27),
the radio frequency device (1) comprising a substrate layer arrangement (3) with a planar differential pair transmission line (7) arranged on one or more surfaces (10, 11) of at least one substrate layer (4, 5) of the substrate layer arrangement (3), and with the transition unit (2) comprising an end section (12) of the differential pair transmission line (7) that is configured as a radio frequency signal emission pattern (13),
the transition unit (2) further comprising an end section (14) of the waveguide (15) for radio frequency electromagnetic waves that is attached to the substrate layer arrangement (3) and that superposes the radio frequency signal emission pattern (13),
wherein the end section (14) of the waveguide (15) is directed perpendicular to the one or more surfaces (10, 11) of the substrate layer arrangement (3) with the planar differential pair transmission line (7),
wherein an open end (17) of the end section (14) of the waveguide (15) is attached to a first outer surface (16) or a second outer surface (19) of the substrate layer arrangement (3), and
wherein opposite to the end section (14) of the waveguide (15), a back cavity (18) is attached with an open end (21) of the back cavity (18) to the substrate layer arrangement (3),
whereby the back cavity (18) prevents a part of radio frequency signal emission that is emitted from the emission pattern (13) from leaking outside of the end section (14) of the waveguide (15);
the radio frequency device (1) comprises several transition units (2) arranged adjacent to each other;
the several transition units (2) are arranged in two or more rows (24, 25) extending in parallel and at a distance towards each other;
a distance (26) between adjacent transition units (2) of a first row (24) of the two or more rows or of a second row (25) of the two or more rows is larger or identical to a lateral extension of the transition units (2) and
wherein at least some of the transition units (2) of the first row (24) are arranged within a corresponding gap (26) between adjacent transition units (2) of the second row (25).