Hi, Ravinder
You might want to look at the following:
Nelco N4000-13EP
Panasonic Megtron Getek
Taconic RF-35TC or RF35A2

I know these are all RF-tailored, but not sure if all are halogen free. I know the Taconic materials are.
You would need to check with them about the UL approval rating. 

________________________________________
From: TechNet [[log in to unmask]] On Behalf Of [log in to unmask] [[log in to unmask]]
Sent: Thursday, July 19, 2012 8:10 PM
To: [log in to unmask]
Subject: [TN] Low Loss PCB Material

Hi All,

We discussed with our quick-turn fab the use of low-loss PCB materials for
high-speed applications.  As per the discussions,the only such material
that is Halogen-Free and has UL Approval seems to be Rogers Theta
material.  If there are other materials available in US and more
importantly at the high-volume fabs off-shore then please share the
information.  I will really appreciate it.

Thanks.


Regards
Ravinder Ajmani
HGST, a Western Digital company
[log in to unmask]


5601 Great Oaks Pkwy.
San Jose, CA 95119-1003
www.hgst.com


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