1. Pozar, D. M., Microwave Engineering, 3rd Edition, John Wiley & Sons, New Delhi, 2010.

2. Rawat, K., M. S. Hashmi, and F. M. Ghannouchi, "Dual-band RF circuits and components for multi-standard software defined radios," IEEE Circuits Syst. Mag., Vol. 12, No. 1, 12-32, First Quater 2012.
doi:10.1109/MCAS.2011.2181074

3. Kenington, P. B., RF and Baseband Techniques for Software Defined Radio, Artech House, Boston, 2005.

4. Hashemi, H. and A. Hajimiri, "Concurrent multiband low-noise amplifiers --- Theory, design, and applications," IEEE Trans. Microw. Theory Tech., Vol. 50, No. 1, 288-301, Jan. 2002.
doi:10.1109/22.981282

5. Nallam, N. and S. Chatterjee, "Multi-band frequency transformations, matching networks and amplifiers," IEEE Trans. Circuits Syst. I: Reg. Papers, Vol. 60, No. 6, 1635-1647, Jun. 2013.
doi:10.1109/TCSI.2012.2221175

6. Iyer, B. and N. P. Pathak, "A concurrent dual-band LNA for noninvasive vital sign detection system," Wiley Microw. & Opt. Tech. Lett., Vol. 56, No. 2, 391-394, Feb. 2014.
doi:10.1002/mop.28127

7. Rawat, K. and F. M. Ghannouchi, "Design methodology for dual-band doherty power amplifier with performance enhancement using dual-band o?set lines," IEEE Trans. Indust. Electronics, Vol. 59, No. 12, 4831-4842, Dec. 2012.
doi:10.1109/TIE.2011.2176695

8. Chow, Y. L. and K. L. Wan, "A transformer of one-third wavelength in two sections-for a frequency and its first harmonic," IEEE Microw. Wireless Comp. Lett., Vol. 12, No. 1, 22-23, Jan. 2002.
doi:10.1109/7260.975723

9. Monzon, C., "A small dual-frequency transformer in two sections," IEEE Trans. Microw. Theory Tech., Vol. 51, No. 4, 1157-116, Apr. 2003.
doi:10.1109/TMTT.2003.809675

10. Sophocles, J. and A. Orfanidis, "Two-section dual-band Chebyshev impedance transformer," IEEE Microw. Wireless Comp. Lett., Vol. 13, No. 9, 382-384, Sep. 2003.
doi:10.1109/LMWC.2003.817135

11. Castaldi, G., V. Fiumara, and I. Gallina, "An exact synthesis method for dual-band Chebyshev impedance transformers," Progress In Electromagnetics Research, Vol. 86, 305-319, 2008.
doi:10.2528/PIER08100605

12. Colantonio, P., F. Giannini, and L. Scucchia, "A new approach to design matching networks with distributed elements," 15th International Conference on Microwaves, Radar and Wireless Communications, MIKON-2004, Vol. 3, 811-814, 2004.

13. Wu, Y., Y. Liu, and S. Li, "A dual-frequency transformer for complex impedances with two unequal sections," IEEE Microw. Wireless Comp. Lett., Vol. 19, No. 2, 77-79, Feb. 2009.
doi:10.1109/LMWC.2008.2011315

14. Dutta Roy, S. C., "Comment on `a dual-frequency transformer for complex impedances with two unequal sections'," IEEE Microw. Wireless Comp. Lett., Vol. 19, No. 9, 602, Sep. 2009.
doi:10.1109/LMWC.2009.2027102

15. Giannini, F. and L. Scucchia, "A complete class of harmonic matching networks: Synthesis and application," IEEE Trans. Microw. Theory Tech., Vol. 57, No. 3, 612-619, Mar. 2009.
doi:10.1109/TMTT.2009.2013319

16. Liu, X., Y. Liu, S. Li, F. Wu, and Y. Wu, "A three-section dual-band transformer for frequency-dependent complex load impedance," IEEE Microw. Wireless Comp. Lett., Vol. 19, No. 10, 611-613, Oct. 2009.

17. Wu, Y., Y. Liu, S. Li, C. Yu, and X. Liu, "A generalized dual-frequency transformer for two arbitrary complex frequency-dependent impedances," IEEE Microw. Wireless Comp. Lett., Vol. 19, No. 12, 792-794, Dec. 2009.
doi:10.1109/LMWC.2009.2034034

18. Chuang, M.-L., "Dual-band impedance transformer using two-section shunt stub," IEEE Trans. Microw. Theory Tech., Vol. 58, No. 5, 1257-1263, May 2010.
doi:10.1109/TMTT.2010.2045560

19. Nikravan, M. A. and Z. Atlasbaf, "T-section dual-band impedance transformer for frequency-dependent complex impedance loads," Electronics Letters, Vol. 47, No. 9, 551-553, Apr. 28, 2011.
doi:10.1049/el.2010.7452

20. Rawat, K. and F. M. Ghannouchi, "Dual-band matching technique based on dual-characteristic impedance transformers for dual-band power amplifiers design," IET Microwaves, Antennas & Propagation, Vol. 5, No. 14, 1720-1729, Nov. 18, 2011.
doi:10.1049/iet-map.2011.0099

21. Zheng, X., Y. Liu, S. Li, C. Yu, Z. Wang, and J. Li, "A dual-band impedance transformer using Pi-section structure for frequency-dependent complex loads," Progress In Electromagnetics Research C, Vol. 32, 11-26, 2012.

22. Moon, B.-T. and N.-H. Myung, "A dual-band impedance transforming technique with lumped elements for frequency-dependent complex loads," Progress In Electromagnetics Research, Vol. 136, 123-139, 2013.
doi:10.2528/PIER12111811

23. Hsieh, K.-A., H.-S. Wu, K.-H. Tsai, and C.-K. C. Tzuang, "A dual-band 10/24-GHz amplifier design incorporating dual-frequency complex load matching," IEEE Trans. Microw. Theory Tech., Vol. 60, No. 6, 1649-1657, Jun. 2012.
doi:10.1109/TMTT.2012.2191303

24. Wu, Y., W. Sun, S.-W. Leung, Y. Diao, and K.-H. Chan, "A novel compact dual-frequency coupled-line transformer with simple analytical design equations for frequency-dependent complex load impedance," Progress In Electromagnetics Research, Vol. 134, 47-62, 2013.
doi:10.2528/PIER12101906

25. Li, S., B. Tang, Y. Liu, S. Li, C. Yu, and Y. Wu, "Miniaturized dual-band matching technique based on coupled-line transformer for dual-band power amplifiers design," Progress In Electromagnetics Research, Vol. 131, 195-210, 2012.
doi:10.2528/PIER12072004

26. Wu, Y., Y. Liu, S. Li, and C. Yu, "New coupled-line dual-band DC-block transformer for arbitrary complex frequency-dependent load impedance," Wiley Microw. & Opt. Tech. Lett., Vol. 54, No. 1, 139-142, Jan. 2012.
doi:10.1002/mop.26480

27. Mongia, R. K., I. J. Bahl, P. Bhartia, and J. Hong, RF and Microwave Coupled Line Circuits, 2nd Edition, Chapter 12, Artech House, Norwood, 2007.

28. Liu, Y., Y. Zhao, S. Liu, Y. Zhou, and Y. Chen, "Multi-frequency impedance transformers for frequency-dependent complex loads," IEEE Trans. Microw. Theory Tech., Vol. 61, No. 9, 3225-3235, Sep. 2013.
doi:10.1109/TMTT.2013.2274779