公开(公告)号：EP0152221A2

公开(公告)日：1985-08-21

申请号：EP85300563.5

申请日：1985-01-28

Applicant: THE GENERAL ELECTRIC COMPANY, p.l.c.

Inventor： Garrood, David ,  Crawshaw, Roger ,  Henderson, Robert Ian ,  Dutton, Frank Allwood

IPC: H01Q19/12

CPC classification number: H01Q19/12 ,  H01Q1/3216

Abstract: An earth terminal for a geostationary satellite communication system incorporates an oval or elliptical shaped antenna 1 whose horizonal dimension d 1 is greater than its vertical dimension d 2 . The relatively small dimension d 2 facilitates transportation of the antenna whilst giving a beam shape which is broader in a direction perpendicular to the geostationary orbit of the satellite than in a direction parallel thereto. This special beam shape accommodates small movements of the satellite perpendicular to the orbit whilst giving the necessary angular resolution in the direction of the orbit to avoid interference with other satellites in the geostationary orbit.

Abstract translation: 用于地球静止卫星通信系统的地球终端包括椭圆形或椭圆形天线1，其水平尺寸d1大于其垂直尺寸d2。 相对较小的尺寸d2有助于天线的传输，同时给出在与卫星的对地静止轨道垂直的方向上比在与其平行的方向更垂直的方向上的波束形状。 这种特殊的波束形状适应垂直于轨道的卫星的小移动，同时在轨道的方向上提供必要的角度分辨率，以避免干扰对地静止轨道中的其他卫星。

公开(公告)号：EP0152221A3

公开(公告)日：1986-11-05

申请号：EP85300563

申请日：1985-01-28

Applicant: THE GENERAL ELECTRIC COMPANY, p.l.c.

Inventor： Garrood, David ,  Crawshaw, Roger ,  Henderson, Robert Ian ,  Dutton, Frank Allwood

IPC: H01Q19/12

CPC classification number: H01Q19/12 ,  H01Q1/3216

Abstract: An earth terminal for a geostationary satellite communication system incorporates an oval or elliptical shaped antenna 1 whose horizonal dimension d 1 is greater than its vertical dimension d 2 . The relatively small dimension d 2 facilitates transportation of the antenna whilst giving a beam shape which is broader in a direction perpendicular to the geostationary orbit of the satellite than in a direction parallel thereto. This special beam shape accommodates small movements of the satellite perpendicular to the orbit whilst giving the necessary angular resolution in the direction of the orbit to avoid interference with other satellites in the geostationary orbit.