TX antenna challenge
I did some interesting antenna test during the evening sun. The test does not meet scientific requirements, but still shows interesting results.
As a comparison in the uplink, I have had the following antennas competed
- 3 Turn Helix in front of 1m prime focus dish
- 36 turn Helix (rhcp)
- 5 ½ turn Helix in front of 90cm Offset, but overhead the LNB ( o bit of center)
The 3 turn with prime focus was definitely the winner. Around 7 dB less (not calibrated) I received the signal from the 90cm Offset with 5 ½ turn helix. Far away (only a bit over the noise) I could read the signal from the helix. The TX Power was 2 watt.
I´ll practice some more tests the next days, with yagis and “beer can antenna” in front of the dish.