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2013-11-14
Realization of Microstrip Bandpass Filter Balun Using Double-Sided Parallel-Strip Line with Novel Coupling Scheme
By
Progress In Electromagnetics Research Letters, Vol. 43, 191-199, 2013
Abstract
In this paper, we propose a microstrip filter balun adopting double-sided parallel-strip line (DSPSL) with a conductor plane inserted in the middle of the substrate. Fed by the DSPSL at input port, two microstrip filters on top and bottom layers are excited simultaneously, with the frequency-independent out-of-phase feature obtained between two output ports. The proposed filter balun exhibits excellent performance with good frequency selectivity because of multiple transmission zeros generated by a new coupling scheme. Finally, a filter balun sample is designed and fabricated, and good agreement is obtained between its measured and simulated S-parameters.
Citation
Cui-Hua Li Minquan Li , "Realization of Microstrip Bandpass Filter Balun Using Double-Sided Parallel-Strip Line with Novel Coupling Scheme," Progress In Electromagnetics Research Letters, Vol. 43, 191-199, 2013.
doi:10.2528/PIERL13092302
http://www.jpier.org/PIERL/pier.php?paper=13092302
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