The RF transmitted signal changes polarization repeatedly as it is refracted between the ionosphere and ground/ocean surface. A horizontally polarized signal radiated from a dipole can arrive at the receiver end with a polarization that is horizontal, vertical and even elliptical.
Therefore antenna polarization reciprocity is not necessary on MF and HF frequencies to make contacts. 73 & GUD DX, Thomas F. Giella, NZ4O Lakeland, FL, USA n...@arrl.net LF/MF/HF/VHF/UHF Frequency Radiowave Propagation Email Reflector: http://lists.contesting.com/mailman/listinfo/spaceweather NZ4O Daily Solar Space Weather & Geomagnetic Data Archive: http://www.kn4lf.com/kn4lf5.htm NZ4O Daily LF/MF/HF/6M Frequency Radiowave Propagation Forecast & Archive: http://www.kn4lf.com/kn4lf6.htm NZ4O 160 Meter Radio Propagation Theory Notes: http://www.kn4lf.com/kn4lf8.htm NZ4O Solar Cycle 24 Forecast Discussion & Archive: http://www.kn4lf.com/kn4lf72.htm
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