said coil of wire providing a tubular shaped metallic grounding surface which alters the electromagnetic field of said radio frequency energy radiated by said ported coaxial cable to direct and concentrate said energy about {HEAD ~ said coil} of {TAIL ~ wire} 
of
said coil of wire providing a tubular shaped metallic grounding surface which alters the electromagnetic field of said radio frequency energy radiated by said ported coaxial cable to direct and concentrate said energy about { HEAD ~ said coil } of { TAIL ~ wire }
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