Abstract: A sectionalized electromagnetic antenna formed of a plurality of co-linear stacked dipole sections. Each of the sections includes a plurality of co-linear conductor elements for conducting an electrical current. A phasing section is disposed between the conductor elements to shift the phase of current through the adjacent conductor element. A connector fitting is located at each end of each of the sections for detachably mechanically and electrically connecting one of the sections to another of the sections. Sections may be added or removed from an antenna of the present invention to obtain a desired gain, radiation pattern or overall length.

Abstract: A cutting line for grass trimmers, lawn mowers, and edgers of the type having a rotating head. The cutting line includes a carrier formed from a polymeric material and an inorganic grit material impregnated within the carrier. Preferably, the grit material makes up between about 6-15% by weight of the cutting line and has an average size of between about 120 to 240 mesh. The grit material may be silicon carbide, aluminum oxide, or silica. The polymeric material is preferably nylon. The carrier may also include a coupling agent and/or a heat stabilizer.