The effect of plastic on planar antenna

Dear All,

Recently, I am simulating mobile tri band planar antenna which is mounted on plastic bracket, the material of plastic bracket is ABS. I would like to know the material property of ABS, e.g. permeability, permitivity, etc. And, I would like to know how much it affects antenna resonant frequency? Please advise me.

Thanks all of you!

Best Regards,
Le ^.^

Hello,
you can find details on Acrylonitrile Butadiene Styrene (ABS), in the matweb http://www.matweb.com.

regards

Usually, the plastic bracket will affect tje antenna resonanct frequency a few percentage, depending on how much brackets used and where they are positioned. This offset have to be considered when designing the antenna.

If the plastic sprayed with metallic paint..... it will act a little more like a metal plate towards the antenna