Wideband Balanced-to-Unbalanced Filtering Power Dividers Based on Coupled Lines
- 13 October 2016
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Microwave Theory and Techniques
- Vol. 65 (1), 86-95
- https://doi.org/10.1109/tmtt.2016.2614668
Abstract
Three novel wideband balanced-to-unbalanced filtering power dividers based on coupled lines are proposed in this paper. Multifunctional power dividers can replace various cascaded single devices to decrease integration mismatching loss and circuit size. The wideband response can be easily realized by the coupled lines structures. To further improve the differential-mode passband selectivity, open/shorted coupled lines and half-wavelength open stubs are applied to introduce two transmission zeros near the passband, respectively. In addition, a resistor in the middle of two single-ended ports can be used to realize isolation between out ports. To verify the proposed concepts, three prototypes of wideband balanced-to-unbalanced filtering power dividers operating at 2 GHz are designed and fabricated with the 4-dB differential-mode bandwidths of 80.5%, 71.5%, and 80%. All the structures show good performances for differential-mode out-of-band suppression, common-mode suppression, and isolation.Keywords
Funding Information
- 2012 Distinguished Young Scientist awarded by the National Natural Science Foundation Committee of China (61225001)
- Natural Science Foundation of China (61401206, 61571231)
- Jiangsu Province (BK20140791)
- 2014 Zijin Intelligent Program of the Nanjing University of Science and Technology
This publication has 20 references indexed in Scilit:
- Wideband Balanced Network with High Isolation Using Double-Sided Parallel-Strip LineIEEE Transactions on Microwave Theory and Techniques, 2015
- Wideband In-Phase and Out-of-Phase Balanced Power Dividing and Combining NetworksIEEE Transactions on Microwave Theory and Techniques, 2014
- Compact Dual-Band Differential Power Splitter With Common-Mode Suppression and Filtering Capability Based on Differential-Mode Composite Right/Left-Handed Transmission-Line MetamaterialsIEEE Antennas and Wireless Propagation Letters, 2014
- A new balanced-to-single-ended (BTSE) power dividerPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2014
- Compact Balanced-to-Balanced Microstrip Diplexer With High Isolation and Common-Mode SuppressionIEEE Microwave and Wireless Components Letters, 2013
- Balanced-to-Balanced Gysel Power Divider With Bandpass Filtering ResponseIEEE Transactions on Microwave Theory and Techniques, 2013
- Filtering power divider for differential input and output signalsPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2013
- Single- and Dual-Band Power Dividers Integrated With Bandpass FiltersIEEE Transactions on Microwave Theory and Techniques, 2012
- Unequal Wilkinson Power Dividers With Favorable Selectivity and High-Isolation Using Coupled-Line Filter TransformersIEEE Transactions on Microwave Theory and Techniques, 2012
- Coupled line power divider with compact size and bandpass responseElectronics Letters, 2009