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1. 发明授权

US4862185A Variable wide angle conical scanning antenna 失效
标题翻译：可变广角锥形扫描天线
公开(公告)号：US4862185A
公开(公告)日：1989-08-29
申请号：US177966
申请日：1988-04-05
申请人： George S. Andrews , Bernard J. Lamberty , Daniel J. Tracy
发明人： George S. Andrews , Bernard J. Lamberty , Daniel J. Tracy
IPC分类号： H01Q3/20
CPC分类号： H01Q3/20
摘要： Disclosed is a variable angle conical scanning antenna that employs an offset paraboloidal reflector which is rotated about an axis that extends through the focus of the paraboloid of revolution that defines the reflector. Electromagnetic energy is supplied to the reflector by an antenna feed that is mounted at the focus of the paraboloid of revolution and directed along the axis of rotation. In this arrangement the electromagnetic energy that is reflected from the offset paraboloidal reflector forms an angle between the axis of rotation and the beam of reflected electromagnetic energy that is equal to the angle between the axis of rotation and the focal axis of the paraboloid of revolution that defines the reflector. Thus, conical scanning at a cone angle that is equal to twice the angle between the axis of rotation and the reflected beam of electromagnetic energy is achieved as the offset paraboloidal reflector is rotated. Variable angle scanning (i.e., conical scanning over a range of cone angles) is achieved by tilting the offset paraboloidal reflector about the focus of the paraboloid of revolution that defines the reflector with the axis of antenna rotation and the focal axis of the paraboloid of revolution that defines the reflector remaining in substantial coplanar relationship.
摘要翻译：公开了一种可变角锥形扫描天线，其采用偏移抛物面反射器，该偏移抛物面反射器围绕延伸穿过限定反射器的旋转抛物面的焦点的轴线旋转。电磁能通过安装在旋转抛物面的焦点并沿着旋转轴线引导的天线馈送供应给反射器。在这种布置中，从偏移抛物面反射镜反射的电磁能量在旋转轴线和反射的电磁能量束之间形成角度，其等于旋转轴线与旋转抛物面的焦点轴线之间的角度，定义反射器。因此，当偏移抛物面反射器旋转时，实现了等于旋转轴线和反射电磁能量束之间角度的两倍的锥角的锥形扫描。通过将偏置抛物面反射器围绕定义反射器的旋转抛物面的焦点倾斜偏转抛物面反射器的轴线和旋转抛物面的焦点轴线来实现可变角度扫描（即，锥角范围内的锥形扫描）其限定反射体保持基本上共面的关系。

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