| 摘要 |
<p>A support frame (20) for a large aperture dish (10) of a dish antenna is constructed as two arrays of rigid struts. The first array of struts is formed as a plurality of pyramidal strut assemblies. Each pyramidal strut assembly as eight rigid struts (5, 7; AB, AF, BG, FG, aA, aB, aG and aF) connected at their ends to five nodes (6, 8; A, B, G, F and a). Four of the nodes (6; A, B, G, F) and four of the struts (5; AB, AF, BG, FG) of each assembly form a rigid, rectangular base, the nodes of which establish mounting points for reflective or conductive elements (21 ) which form the dish (10) of the antenna. The fifth node (8; a) of each assembly, which is at the vertex of the pyramidal assembly, is away from - and behind - the dish (10) of the antenna.</p> |
