Spacing required among wifi and cellular antenna

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soumen21

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Hi All,

I have to use a wifi antenna and a cellular antenna in my design. What is the minimum spacing required between these two antennas to avoid interference among them?

Regards
Soumen
 

Hi,

There is no direct answer for that questions, it depends on the following factors
1. Quality of the Front End filters of your RF devices
2. Directivity of the antennas
3. Linearity of the LNA
4. type of antenna
and many other factors...

Usually, but not always, if you take half wavelength separation you can get 20dB coupling between the antennas. You should read datasheet of the WiFi and Cellular devices and find the rejection of the input Front Ends and the Spectral mask of the output power, and then to calculate the amount of allowable interference at each antenna.
 

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