Hostname: page-component-8448b6f56d-dnltx Total loading time: 0 Render date: 2024-04-19T16:40:59.727Z Has data issue: false hasContentIssue false
  • English
  • Français

Microstrip band-pass filter with −67 dB stop band up to 8.8 times the pass-band center frequency

Published online by Cambridge University Press:  18 September 2017

Frederick Huang
Frederick Huang*
Affiliation:
Department of EESE, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK
*
Corresponding author: F. Huang Email: f.huang@bham.ac.uk
Get access Rights & Permissions [Opens in a new window]

Abstract

Step-impedance resonators and step-impedance capacitor coupling pads are introduced to microstrip band-pass filters to suppress spurious stop-band responses up to the ninth order, thereby providing a very wide stop band. Combined with improvements in existing suppression techniques, the overall suppression in one of the filters, with 1 GHz center frequency and 42% bandwidth, is −54 dB, up to 8.9 GHz. By also using suitably placed resistors, spurious levels are now depressed to −67 dB up to 8.8 GHz, with only 0.03 dB extra pass-band loss.

Keywords

FiltersPassive components and circuitsSuppression of harmonic responses
Type
Research Papers
Information
International Journal of Microwave and Wireless Technologies , Volume 9 , Issue 10 , December 2017 , pp. 1937 - 1944
Copyright
Copyright © Cambridge University Press and the European Microwave Association 2017 

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

[1] Huang, F.: Suppression of harmonics in microstrip filters using a combination of techniques. IEEE Trans. Microw. Theory Tech., 63 (2015), 3453–3461.CrossRefGoogle Scholar
[2] Lin, S.-C.; Deng, P.-H.; Lin, Y.-S.; Wang, C.-H.; Chen, C.H.: Wide-stopband microstrip bandpass filters using dissimilar quarter-wavelength step-impedance resonators. IEEE Trans. Microw. Theory Tech., 54 (2006), 1011–1018.Google Scholar
[3] Chen, C.-F.; Huang, T.-Y.; Wu, R.-B.: Design of microstrip bandpass filters with multiorder spurious-mode suppression. IEEE Trans. Microw. Theory Tech., 53 (2005), 3788–3793.CrossRefGoogle Scholar
[4] Makimoto, M.; Yamashita, S.: Half-wavelength-type SIR, in Itoh, K. and Sakurai, T. (eds.), Microwave Resonators and Filters for Wireless Communications, Springer Verlag, Berlin, 2001, 65–106.CrossRefGoogle Scholar
[5] Makimoto, M.; Yamashita, S.: Bandpass filters using parallel coupled stripline stepped impedance resonators. IEEE Trans. Microw. Theory Tech., MTT-28 (1980), 1413–1417.CrossRefGoogle Scholar
[6] Tu, W.-H.; Li, H.; Michalski, K.A.; Chang, K.: Microstrip open-loop ring bandpass filter using open stubs for harmonic suppression, in IEEE MTT-S Int. Microwave Symp. Dig., San Francisco, 2006.CrossRefGoogle Scholar
[7] Hsu, K.-W.; Tsou, M.-J.; Tseng, Y.-H.; Tu, W.-H.: Wide-stopband bandpass filter with symmetrical loaded-stub resonators, in Proc. Asia-Pacific Microwave Conf., Melbourne. Curran Associates, Inc., Red Hook, NY, USA, 2011.Google Scholar
[8] Griol, A.; Marti, J.; Sempere, L.: Microstrip multistage coupled ring bandpass filters using spur-line filters for harmonic suppression. Electron. Lett., 37 (2001), 572–573.CrossRefGoogle Scholar
[9] Hong, S.; Chang, K.: A parallel-coupled microstrip bandpass filter with suppression of both the 2nd and the 3rd harmonic responses, in IEEE MTT-S Int. Microwave Symp. Dig., San Francisco, 2006.CrossRefGoogle Scholar
[10] Huang, F.: Suppression of harmonics in microstrip filters with stagger tuning and voltage redistributions. IEEE Trans. Microw. Theory Tech., 62 (2014), 464–471.CrossRefGoogle Scholar
[11] Kuo, J.-T.; Chen, S.-P.; Jiang, M.: Parallel-coupled microstrip filters with over-coupled end stages for suppression of spurious responses. IEEE Microw. Wireless Compon. Lett., 13 (2003), 440–442.Google Scholar
[12] Cheong, P.; Fok, S.-W.; Tam, K.-W.: Miniaturized parallel couple-line bandpass filter with spurious-response suppression. IEEE Trans. Microw. Theory Tech., 53 (2005), 1810–1816.CrossRefGoogle Scholar
[13] Riddle, A.: High performance parallel coupled microstrip filters, in 1988 IEEE MTT-S Int. Microwave Symp. Digest, New York, 1988, 427–430.Google Scholar
[14] Afkhami, A.; Askari, G.; Kordzadeh, A.; Sadeghi, H.M.: Second and third harmonic suppression in parallel coupled line filter using sliding coupling, in Proc. 40th European Microwave Conf., Paris, 2010, 759–762.Google Scholar
[15] Sanchez-Soriano, M.A.; Torregrosa-Penalva, G.; Bronchalo, E.: Multispurious suppression in parallel-coupled line filters by means of coupling control. IET Microw. Antennas Propag., 6 (2012), 1269–1276.CrossRefGoogle Scholar
[16] Huang, X.D.; Cheng, C.H.: A novel microstrip dual-mode bandpass filter with harmonic suppression. IEEE Microw. Wireless Compon. Lett., 16 (2006), 404–406.CrossRefGoogle Scholar
[17] Lee, J.-R.; Cho, J.-H.; Yun, S.-W.: New compact bandpass filter using microstrip λ/4 resonators with open stub inverter. IEEE Microw. Guid. Wave Lett., 10 (2000), 526–527.Google Scholar
[18] Zhu, L.; Menzel, W.: Compact microstrip bandpass filter with two transmission zeros using a stub-tapped half-wavelength line resonator. IEEE Microw. Wireless Compon. Lett, 13 (2003), 16–18.Google Scholar
[19] Tu, W.-H.: Compact double-mode cross-coupled microstrip bandpass filter with tunable transmission zeros. IET Microw. Antennas Propag., 2 (2008), 373–377.CrossRefGoogle Scholar
[20] Huang, F.: Suppression of superconducting filter spurious response using lossy parasitic resonators. IET Microw. Antennas Propag., 4 (2010), 2042–2049.CrossRefGoogle Scholar
[21] Huang, F.: Suppression of microstrip filter spurious responses using frequency-selective resistive elements. IET Microw. Antennas Propag., 5 (2011), 1836–1843.CrossRefGoogle Scholar
[22] Huang, F.: Suppression of spurious responses in microstrip filters using a reduced number of resistors. IET Microw. Antennas Propag., 6 (2012), 1128–1135.CrossRefGoogle Scholar
[23] Akra, M.; Pistono, E.; Issa, H.; Jrad, A.; Ferrari, P.: Full study of the parallel-coupled stub-loaded resonator: synthesis method in a narrow band with an extended optimal rejection bandwidth. IEEE Trans. Microw. Theory Tech., 62 (2014), 3380–3392.CrossRefGoogle Scholar
[24] Fathelbab, W.M.; Steer, M.B.: Parallel-coupled line filters with enhanced stopband performances. IEEE Trans. Microw. Theory Tech., 53 (2005), 3774–3781.CrossRefGoogle Scholar
[25] Atwater, H.A.: Microstrip reactive circuit elements. IEEE Trans. Microw. Theory Tech., MTT-31 (1983), 488–491.CrossRefGoogle Scholar
[26] Giannini, F.; Sorrentino, R.; Vrba, J.: Planar circuit analysis of microstrip radial stub. IEEE Trans. Microw. Theory Tech., 32 (1984), 1652–1655.CrossRefGoogle Scholar
[27] Mondal, P.; Mandal, M.K.: Design of dual-band bandpass filters using stub-loaded open-loop resonators. IEEE Trans. Microw. Theory Tech., 56 (2008), 150–155.CrossRefGoogle Scholar
[28] Huang, F.: Suppression of spurious responses in microstrip half-wavelength filters combining stagger tuning and resistive attenuation. Microw. Opt. Technol. Lett., 58 (2016), 1955–1957.CrossRefGoogle Scholar
[29] Matthaei, G.; Young, L.; Jones, E.M.T.: Microwave Filters, Impedance-Matching Networks, and Coupling Structures, Artech House, Norwood, MA, 1980, pages 100, 432–666.Google Scholar
[30]General information of dielectric constant for RT/duroid® 6010.2LM & RO3010TM High frequency circuit materials, http://www.rogerscorp.com/documents/2379/acs/General-Information-of-Dielectric-Constant-for-RT-duroid-6010.2LM-RO3010-High-Frequency-Circuit-Materials.pdf. Accessed Sep 2014.Google Scholar
[31] Choi, Y.-G.; Kim, B.-K.: Design of a 5.8 GHz broadband BPFs with second harmonics suppression using open-stubs, in Proc. of the Asia-Pacific Microwave Conf., Bangkok, Thailand, 2007, 1–4.CrossRefGoogle Scholar
[32] Nie, W.; Luo, S.; Guo, Y.; Fan, Y.: Compact bandpass filter with improved upper stopband. Electron. Lett., 50 (2014), 1065–1067.CrossRefGoogle Scholar
[33] Tu, W.-H.; Chang, K.: Compact second harmonic-suppressed bandstop and bandpass filters using open stubs. IEEE Trans. Microw. Theory Tech., 54 (2006), 2497–2502.Google Scholar
[34] Shaman, H.N.; Hong, J.-S.: Compact wideband bandpass filter with high performance and harmonic suppression, Proc. of the 37th European Microwave Conf., Munich, Germany, 2007, 528–531.CrossRefGoogle Scholar
[35] Liang, C.-H.; Chang, C.-Y.: Compact wideband bandpass filters using stepped-impedance resonators and interdigital coupling structures. IEEE Microw. Wireless Compon. Lett., 19 (2009), 551–553.CrossRefGoogle Scholar
[36] Marimuthu, J.; Esa, M.: Wideband and harmonic suppression method of parallel coupled microstrip bandpass filter using centred single groove, in Proc. of the 2007 IEEE Int. Conf. on Telecommunications and Malaysia Int. Conf. on Communications, Penang, Malaysia, 2007, 622–626.CrossRefGoogle Scholar