A New Balanced-to-Balanced Power Divider/Combiner

作者：Xia, Bin^*; Wu, Lin Sheng; Mao, Junfa

来源：IEEE Transactions on Microwave Theory and Techniques, 2012, 60(9): 2791-2798.

DOI：10.1109/TMTT.2012.2203926

• Balanced-to-balanced circuit
• common mode
• differential mode
• matrix transformation
• power divider/combiner

In this paper, a new balanced-to-balanced power divider/combiner is proposed. By using matrix transformation, two three-port networks for the odd-and even-mode circuit models are deduced, based on the constraint rules of the mixed-mode S-parameters. In order to satisfy the two required scattering matrices simultaneously, the resistances of lumped elements, the characteristic impedances and electrical length of transmission lines are selected appropriately. Then, a planar microstrip structure is designed to realize the proposed balanced-to-balanced power divider/combiner with equal power division. The theoretical, simulated and measured results all show a good mixed-mode performance. In the measurement, the maximum differential-mode transmission coefficient is -3.2 dB, the best differential-mode isolation is 47.2 dB, and the fractional bandwidth of its operating band is approximately 20.8%.

• 出版日期2012-9
• 单位上海交通大学; 中国人民解放军镇江船艇学院