1. Rais-Zadeh, M., J. T. Fox, D. D. Wentzloff, and Y. B. Gianchandani, "Reconfigurable radios: A possible solution to reduce entry costs in wireless phones," Proc. IEEE, Vol. 103, No. 3, 438-451, 2015.
doi:10.1109/JPROC.2015.2396903
2. Zhang, S. X., Z. H. Chen, and Q. X. Chu, "Compact tunable balanced bandpass filter with novel multi-mode resonator," IEEE Microw. Wirel. Components Lett., Vol. 27, No. 1, 43-45, 2017.
doi:10.1109/LMWC.2016.2629965
3. Deng, H. W., L. Sun, F. Liu, Y. F. Xue, and T. Xu, "Compact tunable balanced bandpass filter with constant bandwidth based on magnetically coupled resonators," IEEE Microw. Wirel. Components Lett., Vol. 29, No. 4, 264-266, 2019.
doi:10.1109/LMWC.2019.2902328
4. Rebeiz, G. M., K. Entesari, I. C. Reines, S.-J. Park, M. A. El-Tanani, A. Grichener, and A. R. Brown, "Tuning into RF MEMS," IEEE Microwave Magazine, Vol. 10, No. 6, 55-72, Oct. 2009.
doi:10.1109/MMM.2009.933592
5. Amir, S., M. Dousti, and K.Mafinezhad, "A novel analytical technique to design a tunable bandpass filter with constant bandwidth," International Journal of Electronics and Communications (AEU), Vol. 70, 1433-1442, 2016.
6. Dang, J. H., R. C. Gough, A. M. Morishita, A. T. Ohta, and W. A. Shiroma, "Liquid-metal-based reconfigurable components for RF front ends," IEEE Potentials, Vol. 34, No. 4, 24-30, 2015.
doi:10.1109/MPOT.2014.2360938
7. Liu, T., P. Sen, and C. J. Kim, "Characterization of nontoxic liquid-metal alloy galinstan for applications in microdevices," J. Microelectromechanical Syst., Vol. 21, No. 2, 443-450, 2012.
doi:10.1109/JMEMS.2011.2174421
8. Guo, S., B. J. Lei, W. Hu, W. A. Shiroma, and A. T. Ohta, "A tunable low-pass filter using a liquid-metal reconfigurable periodic defected ground structure," IEEE MTT-S Int. Microw. Symp. Dig., 1-3, 2012.
9. Mumcu, G., A. Dey, and T. Palomo, "Frequency-agile bandpass filters using liquid metal tunable broadside coupled split ring resonators," IEEE Microw. Wirel. Components Lett., Vol. 23, No. 4, 187-189, 2013.
doi:10.1109/LMWC.2013.2247750
10. Pourghorban Saghati, A., J. S. Batra, J. Kameoka, and K. Entesari, "A miniaturized microfluidically reconfigurable coplanar waveguide bandpass filter with maximum power handling of 10 Watts," IEEE Trans. Microw. Theory Tech., Vol. 63, No. 8, 2515-2525, 2015.
doi:10.1109/TMTT.2015.2446477
11. McClung, S. N., S. Saeedi, and H. H. Sigmarsson, "Band-reconfigurable filter with liquid metal actuation," IEEE Trans. Microw. Theory Tech., Vol. 66, No. 6, 3073-3080, 2018.
doi:10.1109/TMTT.2018.2823307
12. Park, E. and S. Lim, "Microfluidic dual-band bandpass filter," 2017 IEEE Asia Pacific Microwave Conference (APMC), 762-764, 2017.
doi:10.1109/APMC.2017.8251559
13. Kaur, T. K., L. Osorio, J. L. Olvera Cervantes, J. R. Reyes-Ayona, and A. Corona-Chavez, "Microfluidic reconfigurable filter based on ring resonators," Progress In Electromagnetics Research Letters, Vol. 79, 59-63, 2018.
14. Zhou, W. J. and J. X. Chen, "Novel microfluidically tunable bandpass filter with precisely-controlled passband frequency," Electron. Lett., Vol. 52, No. 14, 1235-1236, 2016.
doi:10.1049/el.2016.1298
15. Zhou, W. J., H. Tang, and J. X. Chen, "Novel microfluidically tunable differential dual-mode patch filter," IEEE Microw. Wirel. Components Lett., Vol. 27, No. 5, 461-463, 2017.
doi:10.1109/LMWC.2017.2690874
16. Arbelaez-Nieto, A., E. Cruz-Perez, J. L. Olvera-Cervantes, A. Corona-Chavez, and H. Lobato-Morales, "The perfect balanced — A design procedure for balanced bandpass filters [Applications Notes]," IEEE Microwave Magazine, Vol. 16, No. 10, 54-65, Nov. 2015.
doi:10.1109/MMM.2015.2465712
17. Arbelaez-Nieto, A., J. L. Olvera-Cervantes, C. E. Saavedra, and A. Corona-Chavez, "Balanced liquid metal reconfigurable microstrip filter," Journal of Electromagnetic Waves and Applications, Vol. 31, No. 14, 1453-1466, 2017.
doi:10.1080/09205071.2017.1351402
18. Pozar, D. M., Microwave Engineering, 4th Ed., Vol. I, John Wiley & Sons, Inc., 2012.
19. Hong, J.-S. and M. J. Lancaster, Microstrip Filters for RF/Microwave Applications, John Wiley & Sons, Inc., 2001.
doi:10.1002/0471221619
20. Wu, C. H., C. H. Wang, and C. H. Chen, "Novel balanced coupled-line bandpass filters with common-mode noise suppression," IEEE Trans. Microw. Theory Tech., Vol. 55, No. 2, 287-294, 2007.
doi:10.1109/TMTT.2006.889147
21. Struck, C. J., "Group delay," Comput. Sci. Commun. Dict., 697-697, 2000.