Glide slope antenna system
阅读：173发布：2024-02-08
专利汇可以提供Glide slope antenna system专利检索，专利查询，专利分析的服务。并且A switchless glide slope antenna system maintaining horizontal polarization during capture and track functions. The antenna system comprises a track antenna and a capture antenna arranged in an aircraft landing gear door so that switching from capture to track antenna occurs automatically upon gear extension by cross-polarization of the capture antenna.，下面是Glide slope antenna system专利的具体信息内容。
1. In combination with an aircraft having a plurality of landing gear doors, each of said doors having a leading edge with respect to the longitudinal axis of said aircraft, antenna system comprising: a track antenna, said track antenna disposed in the leading edge of one of said landing gear doors, said track antenna remaining shielded from the exterior space surrounding said aircraft when said one of said landing gear doors is in a closed position and capable of receiving a horizontally polarized signal when said one of said landing gear doors is in an open position.
2. The combination according to claim 1 wherein said track antenna comprises a slot antenna.
3. The combination according to claim 1 including a further track antenna disposed in the leading edge of a second of said plurality of landing gear doors.
4. The combination according to claim 1 wherein said one of said landing gear doors comprises a nose gear wheel well door.
5. The combination according to claim 3 wherein said one of said landing gear doors and said second of said plurality of landing gear doors comprise opposing aircraft nose gear doors.
6. In combination with an aircraft having a landing gear and a plurality of landing gear doors which are extended in a generally vertical plane with respect to the runway surface when said landing gear is extended and in a generally horizontal plane with respect to the runway surface when said gear is retracted, an antenna system comprising a capture antenna arranged in a first of said plurality of landing gear doors and a track antenna arranged in said first of said landing gear doors, said capture and track antennas polarized in orthogonal planes so that said track antenna is horizontally polarized (and said capture antenna is vertically polarized) when said first of said plurality of landing gear doors is extended in said generally vertical plane relative to the runway surface.
7. In an aircraft including a plurality of landing gear wheel well doors, a dual channel instrument landing system comprising a first channel having first antenna means arranged in a first of said plurality of landing gear wheel well doors and adapted to receive radiant energy in first and second angularly separated planes of polarization and to supply first and second antenna outputs corresponding respectively to radiant energy thereby received in said first and second planes of polarization, first receiving means coupled to said first and second antenna outputs, and a second channel having second antenna means in a second of said plurality of landing gear wheel well doors and adapted to receive radiant energy in said first and second angularly separated planes of polarization and to supply third and fourth antenna outputs corresponding respectively to radiant energy thereby received in said first and second planes of polarization, second receiving means coupled to said third and fourth antenna outputs.
8. In an aircraft landing gear wheel well door, antenna means adapted to receive radiant energy in first and second angularly separated planes of polarization and to supply first and second antenna outputs corresponding respectively to radiant energy thereby received in said first and second planes of polarization, receiving means, and hybrid circuit means coupled between said antenna means and said receiver means, said antenna means comprising capture and tRack antennas, said capture antenna including a plurality of slot elements arranged parallel to the longitudinal axis of the aircraft.
9. In an aircraft landing gear wheel well door, antenna means adapted to receive radiant energy in first and second angularly separated planes of polarization and to supply first and second antenna output corresponding respectively to radiant energy thereby received in said first and second planes of polarization, receiving means, and hybrid circuit means coupled between said antenna means and said receiver means, said antenna means comprising capture and track antennas, said capture antenna including a plurality of slot elements arranged parallel to the longitudinal axis of the aircraft, and wherein said plurality of slots are spaced one-half wavelength apart and are fed 180* out of phase.
10. In an aircraft landing gear wheel well door, antenna means adapted to receive radiant energy in first and second angularly separated planes of polarization and to supply first and second antenna outputs corresponding respectively to radiant energy thereby received in said first and second planes of polarization, receiving means, and hybrid circuit means coupled between said antenna means and said receiver means, said antenna means comprising capture and track antennas, said capture antenna including a plurality of slot elements arranged parallel to the longitudinal axis of the aircraft, and including further hybrid circuit means coupled to said plurality of slot elements to provide phasing and amplitude balance between said slot elements.
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