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An improved stopband and sharp roll off microstrip low pass filter with defected ground structures

  • Agâh Oktay Ertay (a1), Mehmet Abbak (a1) and Serkan Şimşek (a1)

In this paper a novel low pass filter (LPF) design procedure is proposed for electromagnetic bandgap based microstrip filters without using classical filter design approach. LPF is designed for ultra-wide stopband and sharp roll-off rate via proposed design procedure. It has been shown that finite periodic fan-shaped defected ground structures (FSDGSs) and double radial stubs (DRSs) yield broad stopband and very sharp transition band. The proposed LPF has −3 dB passband from dc to 1.49 GHz, and −20 dB broad stopband from 1.65 GHz up to 7.41 GHz. Full wave electromagnetic (EM) simulation of the proposed filter is achieved with ANSYS's High Frequency Structure Simulator (HFSS) and equivalent circuit (EC) model of the filter is proposed and verified via Applied Wave Research (AWR) software. To verify the simulations, filter is realized on ARLON AD1000 substrate, and measured with Agilent 5245A PNA-X Vector Network Analyzer. Measurement results of fabricated filter are in good agreement with EM and EC simulations.

Corresponding author
Corresponding author: A.O. Ertay Email:
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[1]Kinayman, N.; Aksun, M.I.: Modern Microwave Circuits, Artech House, Norwood, MA, 2005, 02062.
[2]Chen, H.J. et al. : A novel cross-shape DGS applied to design ultra-wide stopband low-pass filters. IEEE Microwave and Wireless Components Letters, 16 (5) (2006), 252254.
[3]Pozar, D.: Microwave Engineering, John Wiley & Sons, New York, 2011.
[4]Yang, F.R.; Ma, K.P.; Qian, Y.; Itoh, T.: A uniplanar compact photonic-bandgap (UC-PBG) structure and its applications for microwave circuit. IEEE Transactions on Microwave Theory and Techniques, 47 (8) (1999), 15091514.
[5]Ahn, D.; Park, J.S.; Kim, C.S.; Kim, J.; Qian, Y.; Itoh, T.: A design of the low-pass filter using the novel microstrip defected ground structure. IEEE Transactions on Microwave Theory and Techniques, 49 (1) (2001), 8693.
[6]Guo, Y.; Wang, Q.: An improved parameters extraction method for dumbbell-shaped defected ground structure. Engineering, 2 (3) (2010), 197200.
[7]Abdel-Rahman, A.B.; Verma, A.K.; Boutejdar, A.; Omar, A.S.: Control of bandstop response of Hi-Lo microstrip low-pass filter using slot in ground plane. IEEE Transactions on Microwave Theory and Techniques, 52 (3) (2004), 10081013.
[8]Boutejdar, A.; Elsherbini, A.; Omar, A.S.: A compact microstrip multi-layer lowpass filter using triangle slots etched in the ground plane, in 36th European Microwave Conference, Manchester, 2006.
[9]Boutejdar, A.; Omar, A.; Burte, E.P.; Mikuta, R.; Batmanov, A.: DGS and multilayer methods make LPF. Microwave & RF Journal [Design Features], (2011), 6172.
[10]Kumar, A.; Kartikeyan, V.M.: Microstrip filter with defected ground structure: a close perspective. International Journal of Microwave and Wireless Technologies, 5 (2013), 589602.
[11]Kim, C.-S.; Park, J.-S.; Ahn, D.; Jae-Bong, L.: A novel 1-D periodic defected ground structure for planar circuits. Microwave and Guided Wave Letters, 10 (4) (2000), 131133.
[12]Hong, J.-S.: Microstrip filters for RF/Microwave Applications, John Wiley & Sons, New Jersey, 2011.
[13]Guha, D.; Antar, Y.M.M.: Microstrip and Printed Antennas New Trends, Techniques and Applications, John Wiley & Sons, United Kingdom, 2011.
[14]Boutejdar, A.; Elsherbini, A.; Omar, A.S.: Method for widening the reject-band in low-pass/band-pass filters by employing coupled C-shaped defected ground structure. IET Microwaves, Antennas & Propagation, 2 (8) (2008), 759765.
[15]Aznar, F.; Velez, A.; Bonache, J.; Menes, J.; Martin, F.: Compact low-pass filters with very sharp transition bands based on open complementary split ring resonators. Electronics Letters, 45 (6) (2009), 316317.
[16]Tu, W.-H.; Chang, K.: Compact microstrip low-pass filter with sharp rejection. IEEE Microwave and Wireless Components Letters, 15 (6) (2005), 404406.
[17]Park, J.; Kim, J.P.; Nam, S.: Design of a novel harmonic-suppressed microstrip low-pass filter. IEEE Microwave and Wireless Components Letters, 17 (6) (2007), 424426.
[18]Gu, J.; Sun, X.: Compact lowpass filter using spiral compact microstrip resonant cells. Electronics Letters, 41 (19) (2005), 10651066.
[19]Ertay, A.O.; Abbak, M.; Şimşek, S.: A compact low pass filter design with a fan-shaped defected ground structure for broad stopband, in 2013 8th International Conference on Electrical and Electronics Engineering (ELECO), Bursa, 2013.
[20]Ansys Corp., HFSS v.11. Pittsburgh, PA, 2010.
[21]SONNET, Version 10.52. Sonnet Software, Inc., 2007.
[22]AWR Corp., AWR Version 10, AWR Corporation, 2013.
[23]Satish, G.N.; Srivastava, K.V.; Biswas, A.; Kettle, D.: A via-free left-handed transmission line with radial stubs in, Asia Pacific Microwave Conference APMC, Singapore, 2009.
[24]Wu, T.-L.; Chung-Hao, T.; Tzong-Lin, W.; Itoh, T.: A novel wideband common-mode suppression filter for gigahertz differential signals using coupled patterned ground structure. IEEE Transactions on Microwave Theory and Techniques, 57 (4) (2009), 848855.
[25]Taher, H.: Ultrawide stopband low-pass filter using triangular resonators defected ground. Journal of Electromagnetic Waves and Applications, 28 (5) (2014), 542550.
[26]Kufa, M.; Raida, Z.: Comparison of planar fractal filters on defected ground substrate. Radioengineering, 21 (4) (2012), 10191024.
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International Journal of Microwave and Wireless Technologies
  • ISSN: 1759-0787
  • EISSN: 1759-0795
  • URL: /core/journals/international-journal-of-microwave-and-wireless-technologies
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