> Before you do this find out what the reflection coefficient is for the > Thunderbolt input and the active antenna output when using a 50 ohm cable. > The active antenna may not be that well matched to 50 ohm cable. > > Then adjust the cable length to an odd multiple of half the signal > wavelength in the cable. > If done well this should reduce the effect of such reflections by more > than 30dB. This of course only works with a single frequency antenna.
FWIW whether even or odd makes no difference for HALF-wavelength multiples - both provide a 1:1 impedance transformation. Chris G3RSE _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
