In this paper, a new miniaturized wide-pass-band filter at U band based on composite right/left- handed transmission line (CRLH TL) is implemented. The CRLH TL contributed to a broadband filter is a balanced structure with a small size of only 1.428 mm*0.5530 mm. The frequency characteristics are simulated and the results show that the 3 dB band width of the proposed filter is about 13.5 GHz from 45.8 GHz to 59.3 GHz. The insertion loss is quite flat through the pass-band and the return loss is relatively low.
 Zhu, N.L., Feng, Q.Y. and Wu, Z. (2011) High-Gain Array Antenna Based on Composite Right/Left-Handed Transmission Line. Int. J. of Communications, Network and System Sciences, 4, 696-703. http://dx.doi.org/10.4236/ijcns.2011.411085
 Lai, A., Itoh, T. and Caloz, C. (2004) Composite Right/Left-Handed Transmission Line Metamaterials. IEEE Microwave Magazine, 5, 34-50. http://dx.doi.org/10.1109/MMW.2004.1337766
 Fei, W., Yu, H., Yeo, K.S., Liu, X. and Lim, W.M. (2012) A 44-to-60GHz, 9.7dBm P1dB, 7.1% PAE Power Amplifier with 2D Distributed Power Combining by Metamateri-al-Based Zero-Phase-Shifter in 65nm CMOS. Proceedings of IEEE MTT-S International Microwave Symposium Digest, Montreal, 17-22 June 2012.
 Moon, B.T. and Myung, N.H. (2014) Design of Low Phase-Noise Oscillator Based on a Hairpin-Shaped Resonator Using Composite Right/Left-Handed Transmission Line. IEEE Microwave and Wireless Components Letters, 24, 44- 46. http://dx.doi.org/10.1109/LMWC.2013.2287234
 Lee, C.J., Leong, K.M.K.H. and Itoh, T. (2005) Design of Resonant Small Antenna Using Composite Right/Left- Handed Transmission Line. Antennas and Propagation Society International Symposium, Washington, 218-221.
 Wang, Z.P., Han, Z.Y. and Guo, L.M. (2011) Miniaturized Zeroth-Order Resonator Based on Simplified CRLH TL Structure. Microwave. Optical. Technology Letters, 53, 848-852. http://dx.doi.org/10.1002/mop.25868
 García-García, J., Bonache, J. and Gil, I. (2006) Miniaturized Microstrip and CPW Filters Using Coupled Metamaterial Resonators. IEEE Transaction. Microwave Theory Technology, 54, 2628-2635. http://dx.doi.org/10.1109/TMTT.2006.872934
 Li, B., Dai, X.W., Wu, B. and Liang, C.H. (2007) Ultra Wideband Filter Design Based on Composite Right/Left Handed Transmission Line. Microwave and Optical Technology Letters, 49, 2379-2381. http://dx.doi.org/10.1002/mop.22733
 Hu, X., Zhang, P. and He, S. (2006) Dual Structure of Composite Right/Left-Handed Transmission Line. Journal of Zhejiang University Science A, 7, 1777-1780. http://dx.doi.org/10.1631/jzus.2006.A1777