These low loss materials include, for example, polyvinylfluoride (Tedlar sold by DuPont), bonding temperature of 400???-425??? F. spun bonded polyethylene (Tyvek) having a melting point at 275??? F. polyetheretherketone (Peek) having a bonding temperature in excess of 334??? C. (633??? F.), polypropylene, polyester, polyamides such as nylon, particularly nylon 66 , linear low density polyethylene,