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Seite Equipment for Phase 3-D Ground Stations
Until the satellite is operational it is difficult to say exactly what the minimum antenna requirements will be. The following should give ample performance on Phase 3-D and are either commercially available or easy to construct.
| Mode | Frequency | Antenna | |
| U V | Uplink | 435 MHz | 11el. Yagi 12.5 dBdC 1.9m boom |
| Downlink | 145 MHz | 5el Yagi 9.0 dBdC 2.1m boom | |
| U S | Uplink | 435 MHz | same as UV uplink |
| Downlink | 2.4 GHz | 28t Helix 1m long or | |
| 60cm Dish | |||
| L U | Uplink | 1.27 GHz | 16t Helix 1.1m or |
| 20el Yagi 1.5m | |||
| Downlink | 435 MHz | same as UV link | |
| L S | Uplink | 1.27 GHz | same as LU uplink |
| Downlink | 2.4 GHz | same as US downlink |
So you see, with a system of four compact antennas you can be active on the four main modes on Phase 3-D. No more problems with the neighbours or the XYL complaining about large antenna systems!
Partly from Mike Ellis, G4UDE, in Oscar News Number 123, February 1997, g4ude@amsat.org
Created: 1998-01-18
Updated: Jan 18, 1998
by Ralf Zimmermann, DL1FDT
This URL: http://www.RalfZimmermann.de/phase3d/groundst.html