Microstrip Ultra-Wideband Filter with Flexible Notch Characteristics
Marjan Mokhtaari, Jens Bornemann
DOI: 10.4236/wet.2012.31002   PDF   HTML   XML   6,646 Downloads   11,819 Views   Citations


A microstrip ultra-wideband (UWB) filter with unique shape, compactness, simplicity of operation and flexible notch characteristics is introduced. It is based on the fundamental and harmonic characteristics of a 50 Ohm transmission line that is grounded at both ends. The filter possesses design flexibility in the sense that it can operate as a stand-alone UWB component or include simple additional circuitry to create one or two notches within the ultra-wideband frequency range. The basic design principles are highlighted and verified using the results of two commercially available field solver packages. Individual filter structures with single and double notches are validated through measurements of a number of filter prototypes.

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M. Mokhtaari and J. Bornemann, "Microstrip Ultra-Wideband Filter with Flexible Notch Characteristics," Wireless Engineering and Technology, Vol. 3 No. 1, 2012, pp. 12-17. doi: 10.4236/wet.2012.31002.

Conflicts of Interest

The authors declare no conflicts of interest.


[1] J. Wells, “MM-Waves in the Living Room: The Future of Wireless High Definition Multimedia,” Microwave Journal, Vol. 62, No. 8, 2009, pp. 72-84.
[2] J.-S. Hong, “Reconfigurable Planar Filters,” IEEE Microwave Magazine, Vol. 10, No. 6, 2009, pp. 73-83. doi:10.1109/MMM.2009.933590
[3] G. L. Matthaei, L. Young and E. M. T. Jones, “Microwave Filters, Impedance Matching Networks and Coupling Structures,” McGraw-Hill, New York, 1964.
[4] H. Ishida and K. Araki, “Design and Analysis of UWB Band Pass Filter with Ring Filter,” IEEE MTT-S International Microwave Symposium Digest, Fort Worth, 6-11 June 2004, pp. 1307-1310.
[5] R. Gómez-García and J. I. Alonso, “Systematic Method for the Exact Synthesis of Ultra-Wideband Filtering Responses Using High-Pass and Low-Pass Sections,” IEEE Transactions on Microwave Theory and Techniques, Vol. 54, No. 10, 2006, pp. 3751-3764. doi:10.1109/TMTT.2006.882883
[6] M. Mokhtaari, J. Bornemann and S. Amari, “A Modified Design Approach for Compact Ultra-Wideband Microstrip Filters,” International Journal of RF & Microwave CAE, Vol. 20, No. 1, 2010, pp. 66-75.
[7] H. Wang and L. Zhu, “Aperture-Backed Microstrip Line Multiple-Mode Resonator for Design of a Novel UWB Bandpass Filter,” Asia-Pacific Microwave Conference Proceedings, Vol. 1, Suzhou, 4-7 December 2005, pp. 1-4.
[8] M. Mokhtaari, J. Bornemann, and S. Amari, “Folded Compact Ultra-Wideband Stepped-Impedance Resonator Filters, IEEE MTT-S International Microwave Symposium Digest, Honolulu, 3-8 June 2007, pp. 747-750.
[9] G.-M. Yang, R. Jin, C. Vittoria, V. G. Harris, and N. X. Sun, “Small Ultra-Wideband (UWB) Bandpass Filter with Notched Band,” IEEE Microwave and Wireless Components Letters, Vol. 18, No. 3, 2008, pp. 176-178. doi:10.1109/LMWC.2008.916781
[10] W.-S. Chang and C.-Y. Chang, “Analytical Design of Microstrip Short-Circuit Terminated Stepped-Impedance Resonator Dual-Band Filters,” IEEE Transactions on Microwave Theory and Techniques, Vol. 59, No. 7, 2011, pp. 1730-1739. doi:10.1109/TMTT.2011.2132140
[11] K. Li, D. Kurita, and T. Matsui, “UWB Bandpass Filters with Multi Notched Bands,” 36th European Microwave Conference Proceedings, Manchester, 10-15 September 2006, pp. 591-594.
[12] H. Shaman and J.-S. Hong, “Ultra-Wideband (UWB) Bandpass Filter with Embedded Band Notch Structures,” IEEE Microwave and Wireless Components Letter, Vol. 17, No. 3, 2007, pp. 193-195. doi:10.1109/LMWC.2006.890467
[13] M. Mokhtaari and J. Bornemann, “Ultra-Wideband and Notched Wideband Filters with Grounded Vias in Microstrip Technology,” Asia-Pacific Microwave Conference Proceedings, Hong Kong, 16-20 December 2008, pp. 1-4.
[14] M. Mokhtaari and J. Bornemann, “Tunable Notch Characteristics in Microstrip Ultra-Wideband Filters,” Asia-Pacific Microwave Conference Proceedings, Singapore, 7-10 December 2009, pp. 1-4. doi:10.1109/APMC.2009.5384323
[15] S.-Y. Lee and C.-M. Tsai, “New Cross-Coupled Filter Design Using Improved Hairpin Resonators,” IEEE Transactions on Microwave Theory and Techniques, Vol. 48, No. 12, 2000, pp. 2482-2490. doi:10.1109/22.899002

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