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You clearly have little idea what you're talking about. CP and the Rototiller design are very common for FM broadcasting. There is a reason to use it in favor of strictly vertical or horizontal polarization. Signal penetration and overall range is usually much better with a CP antenna compared to HP or VP.

-3dB is not a signal loss. The energy is split between vertical and horizontal planes. You will need very expensive test equipment to detect someone dropping to half power.

For HF use, on paper circular polarization would show -3dB gain compared to a dipole. However, during skywave propogation it would exhibit considerably less signal fade. As the receive signal polarity changed the CP antenna would respond equally to vertical, horizontal, or anything in between. Similarly on the other end, the linear polarized receive antenna will respond better to the CP signal than one changing from vertical to horizontal polarity.

If both stations use CP, one would need to use right hand circular and the other left hand circular. Otherwise it would be comparable to receiving HP with a vertical only antenna. The signal loss would be quite high.

<blockquote data-quote="vo1ks" data-source="post: 447424" data-attributes="member: 24212">You clearly have little idea what you&#039;re talking about.&nbsp; CP and the Rototiller design are very common for FM broadcasting.&nbsp; There is a reason to use it in favor of strictly vertical or horizontal polarization.&nbsp; Signal penetration and overall range is usually much better with a CP antenna compared to HP or VP.-3dB is not a signal loss.&nbsp; The energy is split between vertical and horizontal planes.&nbsp; You will need very expensive test equipment to detect someone dropping to half power.For HF use, on paper circular polarization would show -3dB gain compared to a dipole.&nbsp; However, during skywave propogation it would exhibit considerably less signal fade.&nbsp; As the receive signal polarity changed the CP antenna would respond equally to vertical, horizontal, or anything in between.&nbsp; Similarly on the other end, the linear polarized receive antenna will respond better to the CP signal than one changing from vertical to horizontal polarity.If both stations use CP, one would need to use right hand circular and the other left hand circular.&nbsp; Otherwise it would be comparable to receiving HP with a vertical only antenna.&nbsp; The signal loss would be quite high.</blockquote>

[QUOTE="vo1ks, post: 447424, member: 24212"] You clearly have little idea what you're talking about. CP and the Rototiller design are very common for FM broadcasting. There is a reason to use it in favor of strictly vertical or horizontal polarization. Signal penetration and overall range is usually much better with a CP antenna compared to HP or VP. -3dB is not a signal loss. The energy is split between vertical and horizontal planes. You will need very expensive test equipment to detect someone dropping to half power. For HF use, on paper circular polarization would show -3dB gain compared to a dipole. However, during skywave propogation it would exhibit considerably less signal fade. As the receive signal polarity changed the CP antenna would respond equally to vertical, horizontal, or anything in between. Similarly on the other end, the linear polarized receive antenna will respond better to the CP signal than one changing from vertical to horizontal polarity. If both stations use CP, one would need to use right hand circular and the other left hand circular. Otherwise it would be comparable to receiving HP with a vertical only antenna. The signal loss would be quite high. [/QUOTE]

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