Patent ID: 6078296
Filing Date: 2000-06-20
Classification: H01Q

Abstract:
A reflector antenna comprisinga main reflector having an optical axis,an antenna feed,a shiftable mounting mechanism having a position restoring mechanism,a rotatable shaft having an axis and being driven by a motor, the axis of the shaft being aligned with the optical axis of the main reflector,a subreflector having an axis, the subreflector being attached to the shiftable mounting mechanism,the shiftable mounting mechanism being attached to the shaft and the forces generated by rotation of the shaft causing the shiftable mounting mechanism to shift to and remain in a position such that the subreflector is offset from the shaft so that rotation of the shaft causes the subreflector to revolve about the optical axis of the main reflector and so that, in the absence of the rotational forces, the position restoring mechanism within the shiftable mounting mechanism causes the axis of the subreflector to be aligned with the optical axis of the main reflector.