Design and Improvement of Compact Half-Wavelength Band Pass Filter Employing Overlapped Slotted Ground Structure (SGS) and Multilayer Technique
Keywords:
Band pass filter, compactness, multilayer, slotted ground structureAbstract
This paper deals with a compact Chebyschev 3rd hairpin band pass filter design, using the Richards-Kuroda transformation method. Afterwards, a combination of slotted ground structure (SGS) and multilayer technique is applied. Filters using quarter-wavelength steppedimpedance resonator without and with SGS technique are investigated. Finally, two band pass filters are designed, simulated, and partially measured. A compact SGS band pass filter operated at 4.35 GHz is demonstrated. The proposed band pass filter has low insertion loss, high rejection in both the stop bands and a compact size of (20 × 23) mm2 (0.075 ?g × 0.058 ?g) with a guide wavelength ?g = 0.359 m. Additionally, the structure has generated two transmission zeros on both sides of the pass band at 3.1 GHz and 4.9 GHz. The simulated results as well as the experimental results are satisfactory with the filter requirements. The introduced structure can be a good alternative to a conventional parallel-coupled half wavelength, as well as quarter-wavelength stepped-impedance resonator band pass filter.
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References
G. L. Matthaei, L. Young, and E. M. Jones, Microwave Filters, Impedance-Matching Networks, and Coupling Structures, Norwood, MA: Artech House, 1980.
J.-S. Hong and M. J. Lancaster, Microwave Filter for RF/Microwave Application, New York: Wiley, 2001.
W. Bächtold, Mikrowellentechnik, Vieweg Verlag, 1999.
H. Yabuki, M. Sagawa, M. Matsuo, and M. Makimoto, “Stripline dual-mode ring resonators and their application to microwave devices,” IEEE Trans. Microwave Theory Tech., vol. 44, pp. 723-728, May 1996.
K. Wada, Y. Yamamoto, O. Hashimoto, and H. Harada, “A design method of a 2-pole tapped resonator BPF with multiple attenuation poles and its miniaturization,” Proc. Asia-Pacific Microwave Conf., pp. 1111-1114, Nov. 2001.
J. T. Kuo, S. P. Chen, and M. Jiang, “Parallelcoupled microstrip filters with over-coupled end stages for suppression of spurious responses,” IEEE Microwave and Wirless Components Letters, vol. 13, no. 10, Oct. 2003.
B. Easter and K. A. Merza, “Parallel-coupled-line filters for inverted-microstrip and suspendedsubstrate MIC’s,” 11th Eur. Microwave Conf. Dig., pp. 164-167, 1981.
A. Riddle, “High performance parallel coupled microstrip filters,” IEEE MTT-S Symp. Dig., pp. 427-430, 1988.
I. J. Bahl, “Capacitively compensated high performance parallel coupled microstrip filters,” IEEE MTT-S Symp. Dig., pp. 679-682, 1989.
F. Karshenas, A. R. Mallahzadeh, and J. R.- Mohassel, “Size reduction and harmonic suppression of parallel coupled-line bandpass filters using defected ground structure,” Applied Computational Electromagnetics Society (ACES) Journal, vol. 25, no. 2, pp. 149-155, Feb. 2010.
A. Boutejdar, A. Batmanov, A. Elsherbini, A. Omar, and E. Burte, “A miniature 3.1 GHz microstrip bandpass filter with a suppression of spurious harmonic using multilayer-technique and defected ground structure open loop-ring (DGS),” Proc. EUROEM European Electromagnetic 2008, Lausanne, Switzerland, 21-25 July 2008.
A. Boutejdar, A. Abdel-Rahman, A. Batmanov, et. al., “Miniaturized band stop filter based on multilayer-technique and new coupled octagonal defected ground structure with interdigital capacitor,” Microwave and Optical Technology Letters, vol. 52, no. 3, pp. 510-514, March 2010.
A. Boutejdar, N. Mohamed, B. Edmund, O. Abbas, and S. Parui, “Design of novel 4-GHz bandpass filter using a combination of defected ground structure resonators and admittance Jinverter,” Recent Patents on Electrical Engineering Journal, Bentham Science Publishers, vol. 4, no. 1, pp. 42-49, Jan. 2011.
G. Al-Omair, S. Mahmoud, and A. Al-Zayed, “Lowpass and bandpass filter designs based on DGS with complementary split ring resonators,” Applied Computational Electromagnetics Society (ACES) Journal, vol. 26, no. 11, pp. 907-914, Nov. 2011.
S. Rehman, A. Sheta, and M. Alkanhal, “Compact bandpass filters with bandwidth control using defected ground structure (DGS),” Applied Computational Electromagnetics Society (ACES) Journal, vol. 26, no. 7, pp. 624-630, July 2011.
M. Al Sharkawy, A. Boutejdar, F. Alhefnawi, and O. Luxor, “Improvement of compactness of lowpass / bandpass filter using a new electromagnetic coupled crescent defected ground structure resonators,” Applied Computational Electromagnetics Society (ACES) Journal, vol. 25, no. 7, pp. 570-577, July 2010.
N. Garmjani and N. Komjani, “Improved microstrip folded tri-section stepped impedance resonator bandpass filter using defected ground structure,” Applied Computational Electromagnetics Society (ACES) Journal, vol. 25, no. 11, pp. 975-983, Nov. 2010.
A. Boutejdar, “Design, development and optimization of compact microstrip RF filters using "Defected Ground Structure" (DGS) technology”, PhD dissertation, University of Magdeburg, IESK, Magdeburg, Germany.
A. Boutejdar, A. Elsherbini, and A. Omar, “Design of a novel ultra-wide stop band low pass filter using H-defected ground structure,” Microwave and Optical Technology Letters, vol. 50, no. 3, pp. 771-775, March 2008.
S. Amari, “Synthesis of cross-coupled resonator filters using an analytical gradient based optimization technique,” IEEE Trans. Microwave Theory Tech., vol. 48, pp. 1559-1564, Sept. 2000.
