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I am currently working on a system to communicate with amateur CubeSats. I have decided to use the turnstile crossed-dipole style yagi because it is relatively easy to construct and uses circular polarization. However, I cannot find resources on how to calculate the gain for such an antenna. Turnstile Yagi Antenna

I suspect the gain would be equivalent to that of a typical yagi with the same characteristics. Is this correct?

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  • $\begingroup$ Welcome to ham.stackexchange.com! $\endgroup$ – rclocher3 Oct 21 '19 at 14:21
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The answer to calculating the gain of any antenna is usually to model it. EZNEC is a common solution.

Absent modelling, you are correct that a circularly polarized Yagi will have gain approximately equal to an similar linearly polarized one.

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