Antenna, array antenna, radar apparatus, and in-vehicle system
AssigneeHitachi Astemo, Ltd.
InventorsHideyuki Nagaishi, Akira Kuriyama, Akira Kitayama, Hiroshi Kuroda
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Abstract
The present invention provides an antenna comprising: a radiation unit that is formed on a substrate; a waveguide that propagates therein radio waves radiated from the radiation unit and radiates the radio waves as a beam; and a dielectric lens that is arranged in an opening of the waveguide and has an incident plane facing the radiation unit and a radiation plane radiating radio waves entered from the incident plane. The radiation plane of the dielectric lens has a plane orientation different from a flat plane perpendicular to the radiation direction of the beam.
Claims10
An antenna comprising:
- a radiation unit that is formed on a substrate;
- a waveguide that propagates therein radio waves radiated from the radiation unit and radiates the radio waves as a beam;
- and
- a dielectric lens that is arranged in an opening of the waveguide and has an incident plane facing the radiation unit and a radiation plane radiating radio waves entered from the incident plane,
- wherein the radiation plane of the dielectric lens has a plane orientation different from a flat plane perpendicular to the radiation direction of the beam,
- wherein the radiation plane of the dielectric lens has a flat inclined surface having a predetermined angle with respect to a flat plane perpendicular to the radiation direction of the beam at a predetermined position nearer to the radiation direction side of the beam than an opening plane of the waveguide.
Dependencies are inferred from the claim text.