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Richard wrote:
Am hoping that a "flipped turnstile" properly wired would perform with mixed, vertical or horizontal waves coming from the sides. And hoping better than a turnstile. TIA. When I think about a flipped turnstile (though not necessarly wired up as per a regular horizontal turnstile: Maybe, me thinks there is a better way to wire up, given I'm seeking an antenna that is optimal for reception of V, H Mixed waves) I think: Vertical dipole part is going to act as a vertical dipole so flipped turnstile is omnidirectional for V waves. So, you are going to get the same signal from the flipped turnstile as you would a regular V dipole? Horizontal dipole is going to act like a horizontal dipole so there will be figure of eight pattern for H waves. So, you are going to get the same signal from the flipped turnstile as you would a regular H dipole? Downside is the figure of eight pattern with H polarization. Need a turnstile with vertical dipole elements to avoid this. What happens when the TX is radiating a mixed polarized signal. If wired correctly, V dipole adds it's signal voltage to H dipole? But you might as well have two seperate dipoles- right!! :c) Selling point of regular turnstile is the omidirectional pattern. You loose that with a "flipped turnstle" Might as well have a turnstile and a vertical dipole if you wanted omnidirectional reception capability catering for V or H polarized waves. Conclusion: No point in flipping over a turnstile! So it seems. Much better to erect V and H polarized dipoles, or V dipole and turnstile. |
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Help with 900Mhz turnstile.... | Antenna |