Getting ready to start a lindenblad project. 70cm Parasitic lindenblad and for 2meters, an EZ-lindenblad. I dont understand why I would need two for each band (1 LHCP and 1 RHCP) if I do at all. Is it necessary to have one for each polarity on each band? This doesnt make any sense to me, can someone please clarify this for me. Thanks in advance.
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Lindenblad ????
- Thread starter KB3TQO
- Start date
Sure you do if you want to hear all the signals. LHCP and RHCP are akin to vertical and horizontal polarities in that if the signal is of the opposite polarity you are just plain not going to hear it very well if at all. On VHF weak signal stuff the wrong polarity is the difference between a fantastic signal and nothing heard at all.
Thank you for getting back to me. That part does make sense. I was under the impression that the signals from the birds were projected from whip antennas. As the satellite rolls and tumbles, you would adjust for polarity using a yagi by moving it from vertical to horizontal or vice versa. Are you saying that the birds are putting down either a LHCP or a RHCP signal?
It is my understanding that the signals are circularly polarized due to rotation of the spacecraft which is spin stabilized. As the antennas rotate the polarity changes. Another reason for circular polarity is due to Faraday rotation.
IPS - Space Weather - Satellite Communications and Space Weather
IPS - Space Weather - Satellite Communications and Space Weather
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