US 7,548,215 B2
Multi-beam-reflector dish antenna system and method for production thereof
Chang-Hsiu Huang, Taipei Hsien (Taiwan); Chung-Min Lai, Taipei Hsien (Taiwan); and An-Hung Huang, Taipei Hsien (Taiwan)
Assigned to Wistron NeWeb Corporation, Hsi-Chih, Taipei Hsien (Taiwan)
Filed on Jul. 09, 2007, as Appl. No. 11/775,217.
Prior Publication US 2009/0015503 A1, Jan. 15, 2009
Int. Cl. H01Q 19/12 (2006.01); H01Q 13/00 (2006.01)
U.S. Cl. 343—840  [343/779] 13 Claims
OG exemplary drawing
 
1. A multi-beam-reflector dish antenna system comprising:
a reflector for simultaneously receiving signals from a plurality of satellites; and
a first low noise block with integrated feed (LNBF) module for receiving radiation waveforms generated by the reflector, in which the reflector is formed according to the following steps of:
providing the reflector having N-th order curve surface where the value of factor N equals to 2 returned by F(x)N+F(y)N=F(z);
executing expansion according to the equation to achieve expansion of

OG Complex Work Unit Drawing
 in which expansion coefficients of Cnm and Dnm are variables;
analyzing the radiation waveforms of the reflector according to the expansion coefficients of Cnm and Dnm;
synthesizing the radiation waveforms of the reflector to generate a corresponding radiation pattern; and
acquiring the multi-beam-reflector dish antenna according to the expansion coefficients, Cnm and Dnm, and the radiation pattern;
wherein the values of the expansion coefficients Cnm and Dnm are substantially:
   
  n m Cnm Dnm
   
 
  0 0 −10.120820 0.000000E+00
  0 1 −7.044662E−01 0.000000E+00
  0 2 4.054082E−03 0.000000E+00
  0 3 −7.962435E−04 0.000000E+00
  1 0 0.000000E+00 1.884815
  1 1 0.000000E+00 −6.625697E−03
  1 2 0.000000E+00 1.293241E−03
  2 0 4.837928E−01 0.000000E+00
  2 1 −9.740479E−04 0.000000E+00
  2 2 −5.823930E−04 0.000000E+00
  3 0 0.000000E+00 7.859746E−03
  3 1 0.000000E+00 −9.120623E−04
  4 0 −8.800388E−04 0.000000E+00
  4 1 −1.013141E−03 0.000000E+00
  5 0 0.000000E+00 −4.191973E−07
  6 0 −1.080019E−06 0.000000E+00
   
wherein the values of Cnm and Dnm are zero or between 10−10 and 10−6 when corresponding variables n and m are not listed.