US 12,237,581 B2
Cavity slotted-waveguide antenna array, a method of manufacturing a cavity slotted-waveguide antenna array, and a radar antenna module comprising cavity slotted-waveguide antenna arrays
Siete Hamminga, Heemstede (NL); and Rob Van Der Meer, Pijnacker (NL)
Assigned to ROBIN RADAR FACILITIES BV, The Hague (NL)
Filed by ROBIN RADAR FACILITIES BV, The Hague (NL)
Filed on Apr. 5, 2024, as Appl. No. 18/627,534.
Application 18/627,534 is a continuation of application No. 18/170,608, filed on Feb. 17, 2023, granted, now 11,978,960.
Application 18/170,608 is a continuation of application No. 17/534,637, filed on Nov. 24, 2021, granted, now 11,588,252, issued on Feb. 21, 2023.
Application 17/534,637 is a continuation of application No. 16/347,400, granted, now 11,189,935, issued on Nov. 30, 2021, previously published as PCT/EP2017/078148, filed on Nov. 3, 2017.
Claims priority of application No. PA 201670879 (DK), filed on Nov. 8, 2016; application No. PA 201670880 (DK), filed on Nov. 8, 2016; application No. PA 201670881 (DK), filed on Nov. 8, 2016; and application No. PA 201670882 (DK), filed on Nov. 8, 2016.
Prior Publication US 2024/0250449 A1, Jul. 25, 2024
Int. Cl. H01Q 21/00 (2006.01); H01Q 1/52 (2006.01); H01Q 13/02 (2006.01); H01Q 13/18 (2006.01); H01Q 13/22 (2006.01); H01Q 21/06 (2006.01)
CPC H01Q 21/005 (2013.01) [H01Q 1/52 (2013.01); H01Q 13/0233 (2013.01); H01Q 13/18 (2013.01); H01Q 13/22 (2013.01); H01Q 21/064 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A cavity slotted-waveguide antenna array comprising:
an array of waveguide columns disposed in parallel in a predetermined adjacent position with respect to one another in a housing having a front side and a rear side with several of the waveguide columns being provided with a plurality of cavity slots on the front side of said housing, said waveguide columns having upper and lower ends, and said waveguide columns being waveguides with a rectangular cross section, with each or at least part of the waveguide columns being defined by first and second opposing wide inner surfaces, a narrow inner back surface, and a narrow inner front surface, with the plurality of cavity slots extending from the front side of the housing to said narrow inner front surface;
a signal probe operably disposed in each or at least part of the waveguide columns for emitting and/or receiving an electromagnetic signal having a free-space wavelength of λ0, which signal propagates within one or more of the waveguide columns holding the signal probe as electromagnetic waves with a corresponding guided signal wavelength λg; and
several conductive parallel plate blinds conductively secured to the front side of the housing, said plate blinds being arranged substantially perpendicular to the longitudinal direction of the waveguide columns;
wherein each or at least part of the plate blinds comprises a first and a second outer surface with the first outer surface being parallel to the second outer surface and with a distance between the first and second outer surfaces being in the range of one third to one half of the free space signal wavelength λ0.