This paper presents a new approach for the design of a tri-band bowtie antenna. By incorporating slots with triangular shapes on the arms of the bowtie, resonance is obtained in the 2.5 GHz, 4.4 GHz, and 6.2 GHz bands. A study of the effect of triangular slots, their size and their location on the return loss of the antenna is presented. The designed antenna enjoys advantages such as low profile, low cost of fabrication, and high radiation efficiency. Details of the design along with experimental and simulation results in FEKO are presented and discussed. The simulation results of proposed antenna are analyzed by using Method of Moment (MoM) from FEKO software.