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Sound Reinforcement - Forums for Live Sound Professionals - Your Displayed Name Must Be Your Real Full Name To Post In The Live Sound Forums => Wireless and Communications => Topic started by: Jay Barracato on March 06, 2016, 03:00:09 am

Title: Wifi and ground plane
Post by: Jay Barracato on March 06, 2016, 03:00:09 am
Band came in yesterday with a new qu mixer with n a plastic case. The had a wifi router installed inside with two antenna on BNC s mounted on the plastic.

Made me wonder if the performance was degraded by not having a ground plane.

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Title: Re: Wifi and ground plane
Post by: Lyle Williams on March 07, 2016, 02:54:27 am
The antennas probably don't expect a ground plane.
Title: Re: Wifi and ground plane
Post by: Rob Spence on March 07, 2016, 07:24:59 pm
The antennas probably don't expect a ground plane.

If 1/4 wave, yes they do but if 1/2 wave, no they don't.


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Title: Re: Wifi and ground plane
Post by: Russell Ault on March 08, 2016, 02:05:06 am
If 1/4 wave, yes they do but if 1/2 wave, no they don't.

...and given that, by my math, the wavelength of a 2.4 GHz signal is ~5", I'm guessing that whatever antennas you saw, they were at least 1/2-wave...

-Russ
Title: Re: Wifi and ground plane
Post by: Jerome Malsack on March 08, 2016, 08:24:22 pm
Band came in yesterday with a new qu mixer with n a plastic case. The had a wifi router installed inside with two antenna on BNC s mounted on the plastic.

Made me wonder if the performance was degraded by not having a ground plane.

Sent from my XT1254 using Tapatalk

opinion here      most likely the wifi is a control device for the ipad or iPhone or other smart phone to control the mix. 
Digital control of the mix will not impact the sound quality.  The person driving the mix will be in question. 

Title: Re: Wifi and ground plane
Post by: James Cotton on March 09, 2016, 07:48:46 am
opinion here      most likely the wifi is a control device for the ipad or iPhone or other smart phone to control the mix. 
Digital control of the mix will not impact the sound quality.  The person driving the mix will be in question.

I suspect Jay was referring to the performance of the WiFi system rather than the performance that the audience came to see  ;D
Title: Re: Wifi and ground plane
Post by: Tim McCulloch on March 09, 2016, 11:27:51 am
opinion here      most likely the wifi is a control device for the ipad or iPhone or other smart phone to control the mix. 
Digital control of the mix will not impact the sound quality.  The person driving the mix will be in question.

I suspect Professor Barracato knows that....
Title: Re: Wifi and ground plane
Post by: Jay Barracato on March 09, 2016, 11:50:47 am
Yes it was a monitor system, at extremely short distances even for wifi.

While it was impossible to tell about the he length of the antenna as they were encased in plastic, I suspect the 1/2 wave vs. 1/4 wave argument is the answer.

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