| CPC H01Q 19/138 (2013.01) [H01Q 1/3233 (2013.01); H01Q 1/3275 (2013.01); H01Q 13/02 (2013.01)] | 20 Claims |
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1. A radar unit comprising:
a radiating plate comprising an illuminator, a waveguide horn, a waveguide opening, and a radiating sleeve that are formed into a first side of the radiating plate; and
a metallic cover coupled to the first side of the radiating plate to form a plurality of waveguide structures and enclose the illuminator and the waveguide horn,
wherein the plurality of waveguide structures includes a first waveguide that connects the waveguide horn to the waveguide opening,
wherein the waveguide horn is oriented at an acute angle relative to the first waveguide,
wherein the illuminator has an arc-shape with a concave surface oriented toward the radiating sleeve and an end opening of the waveguide horn,
wherein the waveguide horn is configured to receive electromagnetic energy from the first waveguide and direct the electromagnetic energy out through the end opening of the waveguide horn in a first direction toward the concave surface of the illuminator,
wherein the electromagnetic energy traverses a direct path between the opening of the waveguide horn and the concave surface of the illuminator, and
wherein the concave surface of the illuminator reflects the electromagnetic energy such that the electromagnetic energy radiates in a second direction through the radiating sleeve into an environment of the radar unit as one or more radar signals.
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