Method and apparatus for mounting a rotating reflector antenna to minimize swept arc

A reflector antenna, reflector technology, which is applied to antennas, antennas, electrical components and other directions suitable for movable objects, can solve problems such as increasing aircraft resistance and increasing the front surface area of ​​radomes
CN101160691AActive Publication Date: 2008-04-09THE BOEING CO
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
THE BOEING CO
Publication Date
2008-04-09

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Abstract

An apparatus and method for mounting a rotatable reflector antenna system on an outer surface of an aircraft which minimizes a swept arc of a main reflector. This allows the effective frontal area of the main reflector to be reduced such that a radome with a smaller frontal area can be employed to cover the antenna system. The main reflector is rotated about an azimuth axis which is disposed forward of an axial center (i.e., vertex) of the main reflector. In one embodiment the azimuth axis is located in a plane extending between the outermost lateral edges of the main reflector, which define the aperture of the antenna. In another embodiment the azimuth axis is located forward of the outermost lateral edges of the main reflector. In further embodiments the azimuth axis of rotation is located in between a subreflector and a feed horn of the antenna, or in between the vertex of the main reflector and the subreflector.
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Description

[0001] This application is a continuation-in-part of co-pending US Patent Application No. 09 / 965,688 filed September 27,2001. The disclosure of the aforementioned application is hereby incorporated by reference. technical field

[0002] The present invention relates to antenna systems, and more particularly to a method and apparatus for mounting a reflector antenna in a manner that minimizes the arc sweep of the antenna as the antenna rotates about its azimuth axis. Background technique

[0003] The front surface area of ​​an antenna mounted under a radome on an aircraft is very important to the aerodynamics of the aircraft. This is due to the air resistance created by the radome and the effect it has on aircraft performance and fuel consumption. For a reflector antenna that must rotate about its azimuth axis, the antenna's "sweep arc" is larger than the overall width of the antenna's main reflector. This necessitates a radome of considerable width, thereby increasing the ...

Claims

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