Bandpass Filter with Wide Stopband Using Composite Right/Left Handed Transmission Line

Abstract This paper presents a wide-stopband bandpass filter (BPF) based on mixed coupling of the composite right/left handed transmission line (CRLH-TL). First the CRLH-TL resonator is introduced and analyzed. Then mixed coupling (Both electric coupling path and magnetic coupling path exist) of the novel resonator is explained. Based on the structural features of the CRLH-TL resonators, this coupling path can generate an additional transmission zero near passband without increasing the overall size of the filter. Then, good selectivity of the proposed BPF can be obtained. Meanwhile, in order to get a wide stopband, two open stubs are employed to suppress harmonic response of the CRLH-TL resonator. The filter is developed and analyzed based on microwave network theory and equivalent circuit method. The proposed BPF has been designed, fabricated, and measured. The measured results agree with the predicted ones closely.

[1]  Bing-Zhong Wang,et al.  Arbitrary Dual-band Coupler using Accurate Model of Composite Right/Left Handed Transmission Line , 2008 .

[2]  Dan Wang,et al.  Compact bandpass filter with wide stopband using stepped impedance resonators , 2012, The 2012 International Workshop on Microwave and Millimeter Wave Circuits and System Technology.

[3]  Jia-Sheng Hong,et al.  Microstrip filters for RF/microwave applications , 2001 .

[4]  I. Awai,et al.  Equivalent-circuit representation and explanation of attenuation poles of a dual-mode dielectric-resonator bandpass filter , 1998 .

[5]  Kama Huang,et al.  Design of a Coplanar Labyrinth-Based Left Handed Material and its Application to Horn Antennas , 2009 .

[6]  Shaoqian Li,et al.  Wiener Filter Based Channel Estimation for High-Speed Communication Environments , 2013, Wirel. Pers. Commun..

[7]  Lei Wang,et al.  Compact dual-mode DGS resonators and its application to wide stopband bandpass filters , 2011, 2011 4th IEEE International Symposium on Microwave, Antenna, Propagation and EMC Technologies for Wireless Communications.

[8]  Tatsuo Itoh,et al.  Electromagnetic metamaterials : transmission line theory and microwave applications : the engineering approach , 2005 .

[9]  Changiz Ghobadi,et al.  Design of Novel Ultra-Wideband Bandpass Filter with High Selectivity and Wide Stop Band and Optimizing it with Neuro-Genetic Method , 2013, Wirel. Pers. Commun..

[10]  Peng Wang,et al.  Microstrip Antennas with Left-Handed Materials Substrates , 2006 .

[11]  V. Vaidehi,et al.  Qos Enhancement in Wireless VoIP Networks Using Interactive Multiple Model Based Kalman Filter , 2010, ICoAC 2010.

[12]  R. Xu,et al.  Ultra-wideband Power Splitting/combining Technique using Zero-degree Left-handed Transmission Lines , 2007 .

[13]  Kyujin Lee,et al.  PAPR Reduction in Single Carrier FDMA Uplink by Pulse Shaping Using a β-α Filter , 2013, Wirel. Pers. Commun..

[14]  Silviu Ciochina,et al.  An improved spectral subtraction method for speech enhancement using a perceptual weighting filter , 2008, Digit. Signal Process..

[15]  Simona Halunga,et al.  Nonlinear spectral subtraction method for colored noise reduction using multi-band Bark scale , 2008, Signal Process..

[16]  Kaixue Ma,et al.  A compact size coupling controllable filter with separate electric and magnetic coupling paths , 2006 .

[17]  Bing-Zhong Wang,et al.  Wideband Differential Phase Shifter using Modified Composite Right/Left Handed Transmission Line , 2008 .

[18]  Kama Huang,et al.  A Novel Power Divider Based on Dual-Composite Right/Left Handed Transmission Line , 2009 .

[19]  Xuehui Guan,et al.  A cross-shaped stepped-impedance resonator bandpass filter with wide stopband , 2010, 2010 International Conference on Microwave and Millimeter Wave Technology.

[20]  Jin Au Kong,et al.  Propagation of Electromagnetic Waves in a Slab With Negative Permittivity and Negative Permeability - Abstract , 2002 .

[21]  Tao Yang,et al.  A new way of bandpass filter design based on zeroth-order and negative-order resonance modes , 2009, 2009 Asia Pacific Microwave Conference.

[22]  Toshio Ishizaki,et al.  Left-handed band pass filter realized by coupled negative order resonators , 2008, 2008 IEEE MTT-S International Microwave Symposium Digest.