[Date Prev][Date Next][Thread Prev][Thread Next] - [Date Index][Thread Index][Author Index]

Re: Circular Polarized Phasing line?

At 09:29 PM 4/4/98 -0500, you wrote:
>I understand how we frequently combine two 50 ohm feeds into one by using
>1/4 wave 75 ohm lines to transform the 50 to 100 ohms where they combine
>in parallel to give a single 50 ohm feed for the transmission line...
>But many designs I see for the classic Turnstile antenna seem to use this
>same theory with the added 1/4 wave delay to achieve circular
>polarization.   But here is what confuses me.  Since the two antennas are
>90 degrees out of phase, they cannot possibly add together like two real
>impedances as in the in-phase example.   What am I missing?
They CAN  ADD ...

The ADDED phase means that wave leaves AFTER the other, the IMPEDANCE never
gets involved>

73, Gerd, WB8IFM in Dayton