10
Fig.3.1-6 Three-dimensional Forming Diagram of Subreflector and Its
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 32 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.3.1-7.
