Where can I order the foam for antenna application

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.

If you have in mind FoamClad R/F then visit:
http://www.arlon-med.com/products.html

( http://www.arlon-med.com/Tech%20News%20May%202003.pdf
http://www.arlon-med.com/HFE0305_Arlon.pdf )

Regards,
IanP

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: http://www.eccosorb.com/
ANother one is ROHACELL: http://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,
http://www.netcomposites.com/education.asp?sequence=49

Hope this is useful to you.

Cheers,
Element7k