A Coupled-Line Balanced-to-Single-Ended Out-of-Phase Power Divider With Enhanced Bandwidth

作者：Shi, Jin^*; Lu, Jianpeng; Xu, Kai; Chen, Jian-Xin

来源：IEEE Transactions on Microwave Theory and Techniques, 2017, 65(2): 459-466.

DOI：10.1109/TMTT.2016.2636147

• Balanced-to-single-ended
• common-mode suppression
• compact
• coupled line
• enhanced bandwidth
• even- and odd-mode
• out-of-phase
• power divider

In this paper, a coupled-line balanced-to-singleended out-of-phase power divider is proposed. Configured by three quarter-wavelength coupled lines, the proposed power divider is compact and able to enhance the bandwidth of differential-mode power dividing, isolation, common-mode suppression, and phase difference between the output ports. Furthermore, enhancing the bandwidth for common-mode suppression using additional quarter-wavelength open stubs is discussed. Analytical solution of the parameters for specified bandwidth can be achieved using odd-and even-mode analysis. Analytical and practical bandwidth limitation has been analyzed, and it is shown that the bandwidths can be controlled by the odd-and even-mode impedance of the coupled lines. For demonstration, a prototype of size 15 mm x 95 mm (0.15 lambda(g) x 0.95 lambda(g)) achieves an operating bandwidth (vertical bar S-dd AA vertical bar < -20 dB) of 30% with the minimum insertion loss of 0.1 dB.

• 出版日期2017-2
• 单位南通大学