Radar horn antenna
AssigneeMitsubishi Denki Kabushiki Kaisha
InventorTetsuya Ohba
Life of this patent
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Abstract
A radar horn antenna in which, to reduce or remove unnecessary echo from a specific angular range such as ground clutter, divergence in axial direction of a horn antenna 8 accommodated in a casing and covered with a radome is asymmetrical with respect to the axis of the horn antenna so that a maximum radiation direction in a radiation pattern of the horn antenna is deviated from front to another and/or gain in the specific angular range is controlled.
Claims8
A radar horn antenna comprising:
- a horn part with a cross-section that is divergent in an axial direction of the horn antenna and which is formed in a pyramidal shape and asymmetrically with respect to at least one of a primary and a lateral direction of the axis of the horn antenna,
- wherein a maximum radiation direction in a radiation pattern of the horn antenna is angularly controlled, and
- wherein an amount of divergence of at least one of four sidewalls of said horn part of the radar horn antenna is adjustable by pivoting the at least one sidewall either towards or away from the axial direction.
A radar horn antenna comprising a horn part including four sidewalls communicating with a feeding wave-guide tube part, wherein at least one of the four sidewalls comprises a flexible conductor film which is configured so that divergence of the at least one of the four sidewalls in an axial direction with respect to the horn antenna is adjustable by changing a bending angle of the flexible conductor film.
A radar horn antenna comprising two sets of opposing diverging sidewalls,
- wherein at least one of the two sets of opposing sidewalls comprises a first and second sidewall with different respective amounts of divergence, and
- wherein at least one of the first and second sidewalls is a moving sidewall, and comprises a flexible conductor strip.
Dependencies are inferred from the claim text.