A Balanced-to-Single-Ended Wilkinson Power Divider

A balanced-to-single-ended (BTSE) Wilkinson power divider of planar microstrip structure is proposed in this paper. It has a balanced input and two single-ended outputs. Cascade of a balun and a conventional power divider can be replaced by this proposed structure. Based on the theory of mixed-mode S parameters and the admittance matrix method, the critical parameters are determined. The four-port network is analyzed by simplifying it to two-port network with other ports matched at the central frequency. Then the key parameters are derived and the impact of a freely selected variable on the bandwidth is also discussed. An example of 2.4GHz BTSE power divider is designed. The simulated and measured results show the effectiveness of the method: differential-mode transmissions are better than −3.25dB, common-mode transmissions are lower than −28.6dB, common-mode return loss is −0.10dB, differential-mode return loss and isolation is lower than −23.7dB. While the operating bandwidth is 20%.

Index Terms
balanced circuit; power divider; mixed-mode S-matrix

Authorship

Zhen Yang

School of Electronic and Optical Engineering, Nanjing University of Science and Technology, Nanjing, China, liuxing_yz@qq.comNanjing University of Science and TechnologyChinaNanjing, ChinaSchool of Electronic and Optical Engineering, Nanjing University of Science and Technology, Nanjing, China, liuxing_yz@qq.com

Weiguo Liu

Zhejiang Key Lab of Automobile Safety Technology, Geely Automobile Research Institute, Hangzhou, China, lwg@geely.comGeely Automobile Research InstituteChinaHangzhou, ChinaZhejiang Key Lab of Automobile Safety Technology, Geely Automobile Research Institute, Hangzhou, China, lwg@geely.com

Chen Miao

School of Electronic and Optical Engineering, Nanjing University of Science and Technology, Nanjing, China, miaochen78@njust.edu.cnNanjing University of Science and TechnologyChinaNanjing, ChinaSchool of Electronic and Optical Engineering, Nanjing University of Science and Technology, Nanjing, China, miaochen78@njust.edu.cn

Xin-an Yuan

School of Electronic and Optical Engineering, Nanjing University of Science and Technology, Nanjing, China, 443270380@qq.comNanjing University of Science and TechnologyChinaNanjing, ChinaSchool of Electronic and Optical Engineering, Nanjing University of Science and Technology, Nanjing, China, 443270380@qq.com

Wen Wu

School of Electronic and Optical Engineering, Nanjing University of Science and Technology, Nanjing, China, wuwen@njust.edu.cnNanjing University of Science and TechnologyChinaNanjing, ChinaSchool of Electronic and Optical Engineering, Nanjing University of Science and Technology, Nanjing, China, wuwen@njust.edu.cn

SCIMAGO INSTITUTIONS RANKINGS

Figures | Formulas

Figures (6)
Formulas (14)