US 7,548,215 B2Granted

Multi-beam-reflector dish antenna system and method for production thereof

AssigneeWistron Neweb Corp.

InventorsChang-Hsiu Huang, Chung-Min Lai, An-Hung Huang

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Abstract

A multi-beam-reflector dish antenna system and a method for production thereof are disclosed. Signals from different satellites are simultaneously received using a single compound LNBF module. The multi-beam-reflector dish antenna system includes a reflector with N-th order projected aperture and a single compound LNBF module constituting multiple LNBF units. The reflector is formed by projected aperture cutting and surface distortion of the aperture in accordance with the method of analysis and synthesis. In addition to reflecting signals from satellites, it also generates focused waves sharing similar radiation patterns and horizontal gain with incoming waves on the focal plane to be received by the compound LNBF modules.

Claims13

Dependent claims

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
z
⁡
(
t
,
θ
)
=
∑
0
n
⁢
∑
0
m
⁢
[
C
n
⁢
⁢
m
⁢
cos
⁢
⁢
n
⁢
⁢
θ
+
D
n
⁢
⁢
m
⁢
sin
⁢
⁢
n
⁢
⁢
θ
]
⁢
F
m
n
⁡
(
t
)
,
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.

131 more elements

A method for producing a multi-beam-reflector dish antenna system, the method comprising:

providing the multi-beam-reflector dish antenna system with a 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 the expansion
z
⁡
(
t
,
θ
)
=
∑
0
n
⁢
∑
0
m
⁢
[
C
n
⁢
⁢
m
⁢
cos
⁢
⁢
n
⁢
⁢
θ
+
D
n
⁢
⁢
m
⁢
sin
⁢
⁢
n
⁢
⁢
θ
]
⁢
F
m
n
⁡
(
t
)
,
in which expansion coefficients of Cnm and Dnm are variables;
analyzing radiation waveforms of the reflector according to the expansion coefficients of Cnm and Dnm, the radiation waveforms being received by a first LNBF module;
synthesizing the radiation waveforms of the reflector to generate a corresponding radiation pattern;
and
drawing and acquiring the multi-beam-reflector dish antenna system 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.

128 more elements

Dependencies are inferred from the claim text.

Facts

Application: 11/775,217Filed 9 Jul 2007
Published: US 2009/0015503 A115 Jan 2009
Granted: 16 Jun 2009
Term ends: Not estimatedThe source records don’t support an estimate.

Classification4 codes

H01Q 15/141
Reflecting surfaces; Equivalent structures: apparatus or processes specially adapted for manufacturing reflecting surfaces
H01Q 19/132
The primary radiating source being a single radiating element, e.g. a dipole, a slot, a waveguide termination: horn reflector antennas; Off-set…
H01Q 19/17
Wherein the surfaces are concave: the primary radiating source comprising two or more radiating elements
H01Q
Antennas, i.e. radio aerials