| 摘要 |
PROBLEM TO BE SOLVED: To reduce a weight, a cost and an electrical loss including influence from thermal deformation concerning an antenna for mounting to a satellite by using a rigid waveguide of a small electrical loss for a power feeding wire and holding this rigid waveguide in the state of being slidable in its longitudinal direction. SOLUTION: A first radiator 2 and the rigid waveguide 6 are made of light aluminum alloy. A holding member 5a is fixed to a supporter 3, made of aluminum alloy, provided with a hole in the same form as the form of the cross section of the waveguide 6 to slide the wave guide 6 in its longitudinal direction by putting the evaveguide through this hole, to hold the waveguide to the supporter 3. As a load by the thermal deformation of the waveguide 6 is not transmitted to the supporter 3 by this and the supporter never receives the influence of the thermal deformation of the waveguide 6, it is possible to reduce the relative positional variation of the primary radiator 2 supported by the supporter 3 and an antenna reflecting mirror surface 1. |
