LEO satellites - Low Earth orbit satellites in Ham Radio
LEO satellites have a circular (or elliptical) orbit at a height of 250-2000 km from the Earth surface. The maximum time during which a satellite is above the local horizon for an observer on the Earth is up to 20 min. This time is used to transfer data, images, and photographs to selected ground stations positioned in strategic locations.
Leo Pack: antennas-amplifiers.com/produ...
A number of low earth orbit (LEO) OSCAR satellites use frequency modulation (FM). These are also commonly referred to as "FM LEOs" or the "FM Birds". Such satellites act as FM amateur radio repeaters that can be communicated through using commonly available amateur radio equipment.
Ham Radio antennas used in this video are:
1. PA144-CROSS-8-1.7A - 2 meter cross antenna with 4 + 4 elements on 1.7 meter boom.
2. PA432-CROSS-16-1.7A - 70 cm cross antenna with 8 + 8 elements on 1.7 meter boom.
3. 144 - 146 MHz RHCP Kit used to connect two connectors on 2 meter cross antenna and make right-handed circular polarization (RHCP) which is best for satellite communication.
4. 430 - 440 MHz RHCP Kit used to two connectors on 70 cm cross antenna and make right-handed circular polarization (RHCP) which is best for satellite communication.
5. Brackets for antennas, Baluns and Connectors are all included in LEO PACK.
Optional: 40 mm aluminum pipe is possible by order.
2 meter CROSS antenna characteristics:
Frequency: 144 - 146 MHz
Gain: 9.4 dB
F / B: 20 dB
SWR is better than 1.2
Number of elements: 4 + 4
Boom length: 1.7 m
70 cm CROSS antenna characteristics:
Frequency: 432 - 440 MHz
Gain: 13.3 dB
F / B: 30 dB
SWR is better than 1.2
Number of elements: 8 + 8
Boom length: 1.7 m
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Thank you for watching.
Goran YU1CF, Dusan YU2AAD
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