| Abstract |
A microwave applicator for applying electromagnetic radiation at microwave frequency comprising a waveguide (2)with an outer waveguide wall (7) enclosing dielectric material (3) which extends beyond an output end of the waveguide wall to radiate microwave energy,and a coaxial input(5)comprising an inner conductor(6)and oter conductive sleeve(17)surrounding said inner conductor(6)for inputting a microwave signal of predetermined frequency at an input end of the waveguide(2),characterized in that the inner conductor (6) extends from the outer conductive sleeve(17)longitudinally within the waveguide wall(7)into the dielectric material(3)and terminates at a free end thereof with in the dielectric material(3),and a lateral conductor (8)is connected to,and extends laterally from,the inner conductor (6)at a point with in the dielectric material(3)spaced a predetermined distance away from said free end so that the current flow in said inner conductor(6)and lateral conductor (8) launch microwaves in a fundamental mode with in the dielectric material(3)that travel to the output end of the waveguide(2). |