Microwave Bandstop Filters Using Novel Artificial Periodic Substrate Electromagnetic Band Gap Structures

Novel microwave and millimeterwave (mm-wave) bandstop filters using artificial periodic substrate electromagnetic bandgap (EBG) are investigated in this paper. Three types of microstrip structures using periodically modified trace width, patterned dielectric substrate, and periodically modified ground plane are treated, respectively. By periodically modifying either the width of the conductor trace, the substrate height, or the dielectric constant of a standard microstrip transmission line, it has been possible to design microwave bandstop filter functions with wide stopband characteristics and reduced size, compared to conventional microwave/RF filter structures. Commercial electronic design automation (EDA) and computational electromagnetic tools such as Agilent's advanced design system (ADS) and CST Microwave Studio are used in the design and simulations of these filter structures. The effects of the physical parameters of the structures on the filter characteristic are studied. The design procedure and simulation results are described and possible applications of these filter structures are discussed in this paper. A particularly wide stopband is achieved by the circuits presented in this paper, which use only a few cell elements. A significant performance improvement of microstrip patch antenna has been observed by implementing one of the presented EBG periodic substrate structures.

[1]  Ian Hunter,et al.  Theory and Design of Microwave Filters , 2001 .

[2]  Joseph W. Haus,et al.  Photonic Band Gap Structures , 2004 .

[3]  Fu Yunqi,et al.  A novel PBG structure for microstrip lines , 2002, 2002 3rd International Conference on Microwave and Millimeter Wave Technology, 2002. Proceedings. ICMMT 2002..

[4]  A.S. Andrenko.  Study and microwave applications of artificial periodic substrate PBG planar circuits , 2002, International Conference on Mathematical Methods in Electromagnetic Theory.

[5]  Sangwook Nam,et al.  A technique for reducing the size of amplifiers using defected ground structure , 2002, 2002 IEEE MTT-S International Microwave Symposium Digest (Cat. No.02CH37278).

[6]  Shaoqiu Xiao,et al.  1D photonic band gap structures (PBG) for filter applications , 2004, IEEE Antennas and Propagation Society Symposium, 2004..

[7]  Quan Xue,et al.  Novel 1-D microstrip PBG cells , 2000 .

[8]  Ke Wu,et al.  Model-based characterization of finite-periodic finite-ground coplanar waveguides , 1999, 1999 Asia Pacific Microwave Conference. APMC'99. Microwaves Enter the 21st Century. Conference Proceedings (Cat. No.99TH8473).

[9]  Nemai Chandra Karmakar,et al.  Potential applications of PBG engineered structures in microwave engineering: Part I , 2004 .

[10]  Zhengwei Du,et al.  Novel Microstrip Photonic Bandgap Cell Structures , 2001 .

[11]  Randy Rhea,et al.  Recent trends in oscillator design , 2004 .

[12]  Jong-Sik Lim,et al.  Design of 10 dB 90/spl deg/ branch line coupler using microstrip line with defected ground structure , 2000 .

[13]  Jae-Bong Lim,et al.  A novel 1-D periodic defected ground structure for planar circuits , 2000 .

[14]  Tatsuo Itoh,et al.  Simulation and experiment of photonic band-gap structures for microstrip circuits , 1997, Proceedings of 1997 Asia-Pacific Microwave Conference.

[15]  Stephen H. Hall,et al.  High-Speed Digital System Design: A Handbook of Interconnect Theory and Design Practices , 2000 .