Where can I order the foam for antenna application

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antenna_abc

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Hi, I am wondering where I can buy the foam which has almost the same dielectric constant as the air? What is its name? Thanks.
 

A cheaper alternative to Arlon and Emerson&Cuming products is to buy the very common panels of expanded (or extruded) polistyrene.
They are very common material used for housing.
I tryed the Basf 3035® up to 47 GHz , εr≈1.05 and tanδ so small to be near the noise of meter.
 
Hi antenna_abc,

One is ECCOSTOCK: **broken link removed**
ANother one is ROHACELL: https://www.rohacell.com

Both have dielectrical constant about 1.05 and low losses for RF.

Regards

Z
 
Thanks for all your information. But I am still curious about whether the materials you guys mentioned above is not for prototype design?

Since I am looking for the form in order to support the PIFA and other antenna prototypes' copper foil, so I need the foam that is easy to cut by hand and sticked to PCB. Also, the price should be as low as possible.....

Any more information?? Thanks.
 

Dear antenna_abc,

honeycombe will be suitable for your purpose. It is cheap, easy to cut and will stick very well to PCB for prototype purposes. Just to give an example,
https://www.netcomposites.com/education.asp?sequence=49

Hope this is useful to you.

Cheers,
Element7k
 

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