DESIGN OF A COMPACT TRI-BAND POWER DIVIDER WITH UNEQUAL OUTPUTS

Abstract—In this paper, we present a new design of a compact tri-band unequal power divider, which is composed of a circular-coupling power divider and a triple-band resonator. The unequal power dividing characteristic is realized by two circular shaped microstrip lines coupled through a circular shaped slot. The triple-band resonator, which comprises a conventional half-wavelength resonator, a short stub and an open stub, deals with the triple-bandpass performance. The proposed tri-band power divider with 1: 1.6 output power ratios working at 3.4GHz, 4.2GHz, and 5.25GHz is simulated and fabricated, and good agreements between the simulated and measured results are observed. 1