A miniaturized wilkinson power divider for ultra wide-band operation

This paper presents a new miniaturized multi-section Wilkinson power divider based on coupled-line for ultra-wideband operation. The proposed divider is composed of three-sections. An even- and odd-mode analysis is used to calculate the characteristics impedances at the designed frequency, and the performance is optimized for ultra-wideband operation from 0.9 to 4.1 GHz. The realized power divider has return loss lower than -10 dB and insertion loss better than -3.8 dB for the frequency band 0.9-4.1 GHz. Moreover, it occupies more than 60% smaller circuit area compared to conventional ring structure Wilkinson power divider. The measurement results show the good agreement with simulated ones.