Re:Open-source communications by bouncing signals off the Moon
by drmpeg on Saturday November 08, 2025 @11:37PM
(#45862934)
Will you have arrays with the opposite antenna polarity for point to point links? That is, LHCP (Tx), RHCP (Rx) instead of RHCP (Tx), LHCP (Rx).
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Re:Open-source communications by bouncing signals off the Moon
by mrtnmcc2 on Sunday November 09, 2025 @12:03AM
(#45863048)
Great question, the latest version has Tx RHCP, and then Rx either LHCP or RHCP controlled with RF switches (in each antenna). This allows point to point links (where the Tx pol and Rx pol should be the same), or "bounce links" where the circular polarization flips with the bounce. I should note RHCP Rx has a bit worse noise figure (LNA is different) but good enough for any line of sight.