Helically corrugated horn antenna and helically corrugated waveguide system
AssigneesToyota Motor Europe, Teade AB
InventorsGabriel Othmezouri, Harald Merkel
Life of this patent
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Abstract
The present disclosure relates to a horn antenna or waveguide system comprising a corrugated horn or waveguide, wherein the corrugation takes the form of a helical spiral along the inner surface of the horn or waveguide. The present disclosure further relates to radar antenna.
Claims15
A horn antenna comprising a corrugated horn, wherein the corrugation of the horn takes the form of a helical spiral along an inner surface of the horn, a cross section of the horn varies by varying a depth of the corrugation along a main axis of the horn such that resonances at a plurality of frequencies are provided, and several types of corrugation with different cross sectional properties are wound around the horn,
- wherein varying the depth of the cross section of the corrugation includes at least three different depths of the cross section of the corrugation along the main axis,
- the depth of the corrugation is varied corresponding to a predetermined function along the main axis, and
- the predetermined function takes into account at least one of a corrugation depth mean value and the cosine of a wavelength of a signal corresponding to an operation frequency.
A waveguide system comprising a corrugated waveguide, wherein the corrugation of the waveguide takes the form of a helical spiral along an inner surface of the waveguide, the corrugation having a predetermined thread, depths of the thread are modulated corresponding to a predetermined function along a main axis of the waveguide, and several types of corrugation with different cross sectional properties are wound around the waveguide,
- wherein the several types of corrugation with different cross sectional properties include at least three different depths of corrugations with respect to the main axis, and
- the predetermined function takes into account at least one of a corrugation depth mean value and a cosine of a wavelength of a signal corresponding to an operation frequency.
A horn antenna comprising a corrugated horn, wherein the corrugation of the horn takes the form of a helical spiral along an inner surface of the horn, a cross section of the horn varies by varying a depth of the corrugation along a main axis of the horn such that resonances at a plurality of frequencies are provided, and several types of corrugation with different cross sectional properties are wound around the horn,
- wherein the depth of the corrugation is varied corresponding to a predetermined function along the main axis, and
- the predetermined function takes into account at least one of a corrugation depth mean value and the cosine of a wavelength of a signal corresponding to an operation frequency.
Dependencies are inferred from the claim text.