Antennacraft FMSS FM Turnstile, ROTATED to receive both Horizontally and Vertically Polarized signals ALSO is a fairly good RHCP (Right Hand Circularly Polarized) antenna when signal direction along X-Axis. Carefully check interconnections to ensure this happens in "forward" rather than "reverse" direction.
Vertical Polarization is very consistent, but Horizontal Polarization exhibits the usual Bi-Directional Pattern.
Vertical Gain remained between -1.6 and +0.7 dBi across all angles and frequencies. However, Horizontal Gain exhibited the usual Bi-Directional pattern, with Gain in Forward Direction between -3.1 and +0.1 dBi and Gain Nulls to either side.
When receiving a RHCP signal, Total Gain (Vert. + Horiz.) remained between -1.6 and +2.3 dBi across all angles and frequencies, with a moderate RHCP/LHCP Cross-Polarization Ratio between 7 dB (108 MHz)and 10.4 dB (98 MHz).
22 Apr 201314 items4736 visitsAlbum by holl_ands
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enlarge 331KB, 1024x1024 7 FM Turnstile - A-C FMSS Rotated Azimuthal Pattern at 87 MHz
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enlarge 78KB, 278x1024 13 FM Turnstile - A-C FMSS Rotated Side View [1 large box = 5 inches]
