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Author Topic: Spacing of Paddle Antennas?  (Read 1862 times)

Scott Hofmann

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Spacing of Paddle Antennas?
« on: December 29, 2017, 02:43:19 pm »

What would be the ideal spacing between two paddle-type receive antennas for 500 mH wireless mic band?
Will be mounted on the facade of control booth facing the stage.
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Scott Hofmann

Lyle Williams

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Re: Spacing of Paddle Antennas?
« Reply #1 on: December 29, 2017, 07:11:25 pm »

I'm assuming that this is two paddles feeding the one diversity receiver.

There is no ideal separation.  I'd go for at least a foot apart.  Wider if mounting allows.

More important is to deal with polarisation.  Tip one antenna 45deg left and the other 45deg right.

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Henry Cohen

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Re: Spacing of Paddle Antennas?
« Reply #2 on: December 29, 2017, 08:10:50 pm »

What would be the ideal spacing between two paddle-type receive antennas for 500 mH wireless mic band?
Will be mounted on the facade of control booth facing the stage.

How far apart is going to depend on a few factors, and the best mixture/compromise:

- In a near-perfect world, at least one wavelength apart to get the antennas out of each other's radiating near fields (at 500MHz, that's two feet). In a perfect world, about 4-6 wavelengths to get the antennas solidly into their opposing far fields.

- Place the antennas so that each has an optimal, but different view of the desired coverage area.

- It maybe that both antennas can not have a full view of the desired coverage area, so you'll need to place them such that together they have a full view, yet not so individually, with as much overlap as possible.

And walk test thoroughly, with set pieces/obstructions in place, and video walls with moving images or full white.
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Henry Cohen

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Scott Hofmann

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Re: Spacing of Paddle Antennas?
« Reply #3 on: December 30, 2017, 02:10:47 am »

I'm assuming that this is two paddles feeding the one diversity receiver.

There is no ideal separation.  I'd go for at least a foot apart.  Wider if mounting allows.

More important is to deal with polarisation.  Tip one antenna 45deg left and the other 45deg right.
Good info, thanks!
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Scott Hofmann

Scott Hofmann

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Re: Spacing of Paddle Antennas?
« Reply #4 on: December 30, 2017, 02:11:29 am »

How far apart is going to depend on a few factors, and the best mixture/compromise:

- In a near-perfect world, at least one wavelength apart to get the antennas out of each other's radiating near fields (at 500MHz, that's two feet). In a perfect world, about 4-6 wavelengths to get the antennas solidly into their opposing far fields.

- Place the antennas so that each has an optimal, but different view of the desired coverage area.

- It maybe that both antennas can not have a full view of the desired coverage area, so you'll need to place them such that together they have a full view, yet not so individually, with as much overlap as possible.

And walk test thoroughly, with set pieces/obstructions in place, and video walls with moving images or full white.
Great info, thanks for your response!
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Scott Hofmann

Scott Helmke

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Re: Spacing of Paddle Antennas?
« Reply #5 on: December 30, 2017, 10:03:36 am »

- Place the antennas so that each has an optimal, but different view of the desired coverage area.

Ideally as different a view as possible - polarization angle, height, distance out from wall, etc.
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ProSoundWeb Community

Re: Spacing of Paddle Antennas?
« Reply #5 on: December 30, 2017, 10:03:36 am »


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