[20] W.-J. Lin, J.-Y. Li,L.-S. Chen, D.-B. Lin, and M.-P. Houng, Investigation in open circuited metal lines embedded in defected ground structure and its applications to UWB filters,IEEE Microw. Wireless Compon. Lett., vol. 20, no. 3, Mar. 2010: 148–150
[21] R. Gómez-García, J. I. Alonso, and D. Amor-Martn, Using the branchline directional coupler in the design of microwave bandpass filters,IEEE Trans. Microw. Theory Tech., vol. 53, no. 10, Oct. 2005: 3221–3229
[22] R. Gómez-García and J. I. Alonso, Design of sharp-rejection and low-loss wideband planar filters using signal-interference techniques, IEEE Microw. Wireless Compon. Lett., vol. 15, no. 8, Aug. 2005: 530–532
[23] S. Sun, L. Zhu, and H. H. Tian, A compact wideband bandpass filter using transversal resonator and asymmetrical interdigital coupled lines, IEEE Microw. Wireless Compon. Lett., vol. 18, no. 3, Mar. 2008:173–1755
[24] W. J. Feng, W. Q. Che and T. F. Eibert, Ultra-wideband bandpass filter based on transversal signal-interaction concepts, IET Electron. Lett., vol. 47, no. 24, Nov. 2011: 1330-1331
[25] W. J. Feng, W. Q. Che, Novel ultra-wideband bandpass filter using shorted coupled lines and transversal transmission line, IEEE Microw. Wireless Compon. Lett., vol. 20, no. 10, Oct. 2010: 548–551
[26] H. Wang, Q.-X. Chu, and J.-Q. Gong, A compact wideband microstrip filter using Folded multiple-mode resonator, IEEE Microw. Wireless Compon. Lett, vol. 19, no. 5, May 2009: 287-289
[27] K. W. Wong, L. Chiu, and Q. Xue, Wideband parallel-strip bandpass filter using phase inverter, IEEE Microw. Wireless Compon. Lett, vol. 18, no. 8, Aug. 2008: 503–505 宽带滤波器文献综述和参考文献(3):http://www.youerw.com/wenxian/lunwen_23374.html