R. Li, S. Sun, and L. Zhu, "Direct synthesis of transmission line low-pass/high-pass filters with series stubs," IET Microwaves, Antennas & Propagation, vol. 3, no. 4, pp. 654-662, Jun. 2009. [DOI:10.1049/iet-map.2008.0259]
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Pre One:S. Sun and L. Zhu, "Miniaturized patch hybrid couplers using asymmetrically-loaded cross slots," IET Microwaves, Antennas & Propagation, vol. 4, no. 9, pp.1427-1433, Sep. 2010. [DOI:10.1049/iet-map.2009.0293]
Next One:R. Li, S. Sun, and L. Zhu, "Synthesis design of ultra-wideband bandpass filters with designable transmission poles," IEEE Microwave and Wireless Component Letters, vol. 19, no. 5, pp. 284-286, May 2009. [DOI:10.1109/LMWC.2009.2017590]