US 11,959,954 B2
Contactless microstrip to waveguide transition
Hanna Karlsson, Gothenburg (SE); Esperanza Alfonso Alós, Västra Frölunda (SE); Magnus Gustafsson, Alingsås (SE); and Thomas Emanuelsson, Västra Frölunda (SE)
Assigned to GAPWAVES AB, Gothenburg (SE)
Appl. No. 17/285,125
Filed by GAPWAVES AB, Gothenburg (SE)
PCT Filed Sep. 19, 2019, PCT No. PCT/EP2019/075096
§ 371(c)(1), (2) Date Apr. 14, 2021,
PCT Pub. No. WO2020/078652, PCT Pub. Date Apr. 23, 2020.
Claims priority of application No. 1830297-6 (SE), filed on Oct. 19, 2018.
Prior Publication US 2021/0376439 A1, Dec. 2, 2021
Int. Cl. H01P 5/10 (2006.01); G01R 29/10 (2006.01); H01P 5/107 (2006.01); H01Q 9/04 (2006.01); H01Q 21/00 (2006.01); H01Q 13/10 (2006.01)
CPC G01R 29/10 (2013.01) [H01P 5/107 (2013.01); H01Q 9/0407 (2013.01); H01Q 21/005 (2013.01); H01Q 13/10 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A microstrip to waveguide transition comprising:
a waveguide module; and
a printed circuit board (PCB),
wherein the module is arranged to interface with the PCB, the PCB comprising a patch antenna and a ground plane, the module comprising a waveguide aperture and a repetitive structure, the waveguide aperture arranged extending through the module for attaching a waveguide to an external side of the waveguide module, the repetitive structure comprising a plurality of protruding metal or metallized elements arranged to surround the waveguide aperture on an internal side of the module and to define a passage into the waveguide aperture on the internal side,
wherein the repetitive structure is configured to attenuate electromagnetic signal propagation in a frequency band past the repetitive structure while allowing propagation via the passage,
wherein the repetitive structure and ground plane constitute a gap waveguide structure, and
wherein the repetitive structure is arranged at a distance from the ground plane, where the distance is smaller than a quarter of an operation wavelength of the waveguide module.