A method of constructing an antenna of a portable communication device. The method includes wrapping a conductive element around a flexible support, coupling the conductive element and the flexible support to a rigid connector to assemble an antenna core, and coating the antenna core with a room temperature vulcanizing (RTV) silicone layer. The method further includes fitting a first half of a silicone rubber sheath and a second half of a silicone rubber sheath around the antenna core, compression molding the first half of the silicone rubber sheath and the second half of the silicone rubber sheath around the antenna core, and bonding, by the RTV silicone layer, the silicone rubber sheath to the antenna core.