9
Fig.3.1-4 Three-dimensional Diagram of Subreflector and Supporting Mechanism
3.1.1.4 Reflector Backups Design
The backups are the main stressed component and structural support of the whole antenna
reflector. It adopts space reticular truss structure, of which various structural parts have such
advantages as goodish consistency, smooth stress transmission, uniform stress, favorable
manufacture and installation, etc. and are widely applied because of the higher rigidity-weight
ratio.
The backups consist of the HUB, radiating beams and hoop stress bars and diagonal bars. It is
divided 20 pieces of main radiating beams along circumferential direction, a space pull bar is
laid between two radiating beams. The diagonal bars are laid between the outer surface
radiating beams. The previous bars parts constitute the space reticular truss structure, as
shown in Fig.3.1-5.
Fig.3.1-5 Reflector Backups Schematic Diagram