This paper describes the design and implementation of a prototype applicator based on an array of 16 antennas operating at 433 MHz. In order to obtain a system able to operate at this frequency, a compact divider device was implemented. Measured S-parameters show the system is able to provide adequate amplitude and phase to function as a heating system for neck diameters up to 12 cm. This prototype was finally evaluated obtaining a temperature increase of 2.2?C per hour.