Funktionsweise der Toroidal Antenne
TECHNOLOGY-TOROIDAL'S DUAL REFLECTOR
Sub-reflectors offer flexibility of design for reflecting telescopes. The classical arrangement introduced by N. Cassegrain of France uses a sub-reflector of hyperbolic shape which surrounds the prime focus of the main parabolic reflector. There are some variations and Gregorian reflector has an ellipsoid as a sub-reflector.
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Table 1. Double Reflector Antennas (P:Parabola, H:Hyperboloid, E:Ellipsoid)
WAVEFRONTIER's TOROIDAL dual reflector antenna is similar to Gregorian reflector in shape, but the basic formula differs from it. The sub-reflector of TOROIDAL antenna is from a virtual toroid, but the main reflector is analogous to an ellipsoid. There is no parabolic formula. This system has a convex - concave sub-reflector. This sub-reflector is convex in one plane and concave in orthogonal plane. The complete shape of them are obtained through elaborate mathematical and physical calculation. You can say it's a NEW TOROIDAL multi-sat antenna.
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MODEL |
TOROIDAL 55 |
TOROIDAL 90 |
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Main Reflector |
Height |
53.2 cm (20.9 in.) |
96.7 cm (38.1 in.) |
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Width |
66.8 cm (26.3 in.) |
108.6 cm (42.8 in.) |
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Sub Reflector |
Height |
25.3 cm (10.0 in.) |
36.1 cm (14.2 in.) |
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Width |
49.7 cm (19.6 in.) |
83.6 cm (32.9 in.) |
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Net Weight |
6.7 kg (14.7 lbs) |
14.1 kg (31.0 lbs) |
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Operating Frequency |
10.70 - 12.75 GHz |
10.70 - 12.75 GHz |
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Polarization |
Linear & Circular |
Linear & Circular |
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Multi Satellite Azimuth Range |
± 30 degree |
± 25 degree |
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Midband Gain @ 12.5 GHz |
35.7 dB (± 0.3 dB) |
39.65 dB (± 0.45 dB) |
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Recommended Satellite Spacing |
4.5 degrees |
4.5 degrees |
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Efficiency |
70 ~ 82 % |
65 ~ 80 % |
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Reflector Material |
Galvanized Steel with Polyester Powder Coating |
Galvanized Steel with Polyester Powder Coating |
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Mount Type |
Elevation over Azimuth |
Elevation over Azimuth |
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Operational Temperature |
-30°C to +60°C (-22F to 140F) |
-30°C to +60°C (-22F to 140F) |
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Relative Humidity |
0 – 90 % |
0 – 90 % |
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Windloading |
Operational |
80 km/h (50 mph) |
80 km/h (50 mph) |
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Survival |
200 km/h (125 mph) |
200 km/h (125 mph) |
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LNB Installation |
1 – 8 LNB’s |
1 – 12 LNB’s |
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Montageanleitung für Toroidal T 90 ( 5 MB pdf-Datei)
Download mit rechter Mousetaste
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Unique and creative Central symmetry Lens(CSL) antenna on a flat metal reflector.
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Copyright © 1997-2002 Olbort Decoder und Satellitentechnik
Zuletzt geändert am:
06. Juli 2002
