An electrosurgical system for directing energy to tissue (T), comprising: a generator assembly (28, 310, 410A-C) operable to supply power having a selected phase, amplitude and frequency; and an applicator array assembly (270A-C, 950, 1100A, 1450) including: a shell assembly ; a plurality of energy applicators disposed within the shell assembly; and a power divider unit electrically coupled to the generator assembly, the power divider unit operable to divide power into the applicator array assembly; wherein each of the plurality of energy applicators includes: a length of coaxial cable having an inner conductor , an outer conductor coaxially disposed around the inner conductor, and a dielectric material disposed therebetween; an elongated electrically-conductive member longitudinally disposed at a distal end of the inner conductor; a balun structure (B, 322, 430, 431, 432) disposed on the outer conductor ; an electrically-conductive cylinder coaxially disposed around a distal portion of the balun structure; and a dielectric structure disposed substantially adjacent to a distal end of the electrically-conductive cylinder , wherein the dielectric structure longitudinally extends from the distal end of the electrically-conductive cylinder to a distal end of the electrically-conductive member. a generator assembly (28, 310, 410A-C) operable to supply power having a selected phase, amplitude and frequency; and an applicator array assembly (270A-C, 950, 1100A, 1450) including: a shell assembly ; a plurality of energy applicators disposed within the shell assembly; and a power divider unit electrically coupled to the generator assembly, the power divider unit operable to divide power into the applicator array assembly; a shell assembly ; a plurality of energy applicators disposed within the shell assembly; and a power divider unit electrically coupled to the generator assembly, the power divider unit operable to divide power into the applicator array assembly; wherein each of the plurality of energy applicators includes: a length of coaxial cable having an inner conductor , an outer conductor coaxially disposed around the inner conductor, and a dielectric material disposed therebetween; an elongated electrically-conductive member longitudinally disposed at a distal end of the inner conductor; a balun structure (B, 322, 430, 431, 432) disposed on the outer conductor ; an electrically-conductive cylinder coaxially disposed around a distal portion of the balun structure; and a dielectric structure disposed substantially adjacent to a distal end of the electrically-conductive cylinder , wherein the dielectric structure longitudinally extends from the distal end of the electrically-conductive cylinder to a distal end of the electrically-conductive member. a length of coaxial cable having an inner conductor , an outer conductor coaxially disposed around the inner conductor, and a dielectric material disposed therebetween; an elongated electrically-conductive member longitudinally disposed at a distal end of the inner conductor; a balun structure (B, 322, 430, 431, 432) disposed on the outer conductor ; an electrically-conductive cylinder coaxially disposed around a distal portion of the balun structure; and a dielectric structure disposed substantially adjacent to a distal end of the electrically-conductive cylinder , wherein the dielectric structure longitudinally extends from the distal end of the electrically-conductive cylinder to a distal end of the electrically-conductive member. <EOS>