A wideband filtering Wilkinson power divider integrated with good harmonic suppression

Abstract

AbstractIn this paper, a wideband filtering Wilkinson power divider embedded with square‐loop resonators and short‐circuit stubs is designed and presented. Shunt short‐circuit meander line stubs are utilized at both output ports to provide extra transmission zeros (TZs) at 7, 14, and 19 GHz. Moreover, the square‐loop resonators, which are placed along the conventional λ/4 transmission lines, provide TZs at 9 and 14 GHz. Over the frequency range from 3 to 6 GHz, insertion loss of 0.3 dB, return loss greater than 12 dB and isolation better than 10 dB have been obtained. The proposed power divider has a compact size of 0.237 λg × 0.415 λg. Finally, the proposed circuit has been fabricated, and the measurement results have a good agreement with the simulation results.