does an optimal can length exist for the cantenna?

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x3oo
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Joined: 15 Sep 2010
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PostPosted: Fri Oct 08, 2010 17:25    Post subject: does an optimal can length exist for the cantenna? Reply with quote
hi
i would like to ask,
if there is a best canlength for the cantenna, or just the minimum 3/4 wavelength.
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()blivion
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Joined: 05 Aug 2010
Posts: 20

PostPosted: Fri Oct 29, 2010 18:14    Post subject: Reply with quote
In theory, any even fraction or multiple of the wave length should resonate and thus be the best choice. But, more or less the longer your can/tube, the narrower your "beam". Which in a nut shell translates to longer range at the cost of being harder to aim. Of course, there is a point of diminishing returns. I wouldn't go past ~2 wavelengths. If you need more range than a standard cantenna, use a bi-quad and satdish. Just my bi-quad has as much range as any of my cantennas ever did, but with about a 90 deg. sweep. And with a dish, they can go for miles.
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