A Novel Wideband Balanced-to-Unbalanced Power Divider Using Symmetrical Transmission Lines

A novel wideband balanced-to-unbalanced power divider using symmetrical transmission lines is proposed. Due to the symmetry of the power divider circuit, even/odd-mode analysis method is applied to derive the even/odd-mode values and transmission line characteristic impedance. A resistor in the middle of two single-ended output ports is used to realize high isolation for the power division ports. One prototype of the wideband balanced-to-unbalanced power divider operating at 2.2 GHz (1.24–3.20 GHz) is designed and measured to prove the proposed methods.

[1]  W. R. Eisenstadt,et al.  Microwave differential circuit design using mixed-mode S-parameters , 2006 .

[2]  Quan Xue,et al.  The Proper Balance: Overview of Microstrip Wideband Balance Circuits with Wideband Common Mode Suppression , 2015, IEEE Microwave Magazine.

[3]  Jun-Fa Mao,et al.  A new balanced-to-single-ended (BTSE) power divider , 2014, 2014 IEEE International Wireless Symposium (IWS 2014).

[4]  Jr. R. Wyndrum.  Microwave filters, impedance-matching networks, and coupling structures , 1965 .

[5]  Junfa Mao,et al.  A New Balanced-to-Balanced Power Divider/Combiner , 2012, IEEE Transactions on Microwave Theory and Techniques.

[6]  Kai Xu,et al.  A Balanced-to-Unbalanced Microstrip Power Divider With Filtering Function , 2015, IEEE Transactions on Microwave Theory and Techniques.

[7]  Fadhel M. Ghannouchi,et al.  A Wideband Balanced-to-Unbalanced Coupled-Line Power Divider , 2016, IEEE Microwave and Wireless Components Letters.

[8]  Quan Xue,et al.  Wideband Balanced Network with High Isolation Using Double-Sided Parallel-Strip Line , 2015, IEEE Transactions on Microwave Theory and Techniques.