Hostname: page-component-848d4c4894-cjp7w Total loading time: 0 Render date: 2024-06-26T18:10:51.981Z Has data issue: false hasContentIssue false
  • English
  • Français

Bandwidth-enhanced lumped-element absorptive bandstop filter topology and its application to LTCC bandstop filter design

Published online by Cambridge University Press:  27 August 2014

Juseop Lee ,
Byungguk Kim ,
Kangho Lee  and
William J. Chappell
Juseop Lee*
Affiliation:
Department of Computer and Communications Engineering, Korea University, Seoul 136-701, Republic of Korea. Phone: +82 2 3290 4848
Byungguk Kim
Affiliation:
School of Electrical and computer Engineering, Purdue University, West Lafayette, IN 47907, USA
Kangho Lee
Affiliation:
Department of Computer and Radio Communications Engineering, Korea University, Seoul 136-701, Republic of Korea
William J. Chappell
Affiliation:
School of Electrical and computer Engineering, Purdue University, West Lafayette, IN 47907, USA
*
Corresponding author: J. Lee Email: juseoplee@gmail.com
Get access Rights & Permissions [Opens in a new window]

Abstract

In this paper, we show a second-order (four-resonator) absorptive bandstop filter circuit topology which gives a larger bandwidth compared to a first-order topology. Due to the absorptive characteristic, it creates a large attenuation at the center frequency using low-Q resonators. Since low-Q resonators can be used in generating a large attenuation, small-size resonators can be employed in bandstop filter design. Analytic design equations are provided so that a higher-order absorptive bandstop filter can be designed analytically. It is also shown that the second-order filter topology exhibits a better frequency selectivity having a same bandwidth. The proposed filter topology has been applied to a design of a miniaturized low-temperature co-fired ceramic bandstop filter with low-Q resonators. The Q-factor of the lumped-element resonators has been chosen to be 5 for demonstration.

Keywords

FiltersPassive components and circuits
Type
Research Paper
Information
International Journal of Microwave and Wireless Technologies , Volume 7 , Issue 6 , December 2015 , pp. 691 - 698
Copyright
Copyright © Cambridge University Press and the European Microwave Association 2014 

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

REFERENCES

[1]Wu, R.; Amari, S.; Resenberg, U.: New cross-coupled microstrip band reject filters. IEEE MTT-S Int. Microw. Symp. Digest, 3 (2004), 1597–1600.Google Scholar
[2]Amari, S.; Rosenberg, U.; Wu, R.: In-line pseudoelliptic bandreject filters with nonresonating nodes and/or phase shifts. IEEE Trans. Microw. Theory Tech., 54 (2006), 428–436.Google Scholar
[3]Wang, Z.P.; Kelly, J.; Hall, P.S.: Reconfigurable bandstop filter with wide tuning range. Electron. Lett., 46 (2010), 771–772.Google Scholar
[4]Lee, J.; Naglich, J.; Chappell, W.J.: Frequency response control in frequency-agile bandstop filters. IEEE Microw. Wirel. Compon. Lett., 20 (2010), 669–671.Google Scholar
[5]Ou, Y.C.; Rebeiz, G.M.: Lumped-element fully tunable bandstop filters for cognitive radio applications. IEEE Trans. Microw. Theory Tech., 59 (2011), 2461–2468.Google Scholar
[6]Naglich, E.J.; Lee, J.; Peroulis, D.; Chappell, W.J.: Extended passband bandstop filter cascade with continuous 0.85–6.6 GHz coverage. IEEE Trans. Microw. Theory Tech., 60 (2012), 21–30.Google Scholar
[7]Mandal, M.K.; Divyabramham, K.; Velidi, V.K.: Compact wideband bandstop filter with five transmission zeros. IEEE Microw. Wirel. Compon. Lett., 22 (2012), 4–6.Google Scholar
[8]Qian, K.; Tang, X.H.: Compact ultra-wideband low-temperature co-fired ceramic bandstop filter using semi-lumped resonators. Electromagnetics, 32 (2012), 193–199.Google Scholar
[9]Jachowski, D.R.: Passive enhancement of resonator Q in microwave notch filters. IEEE MTT-S Int. Microw. Symp. Digest, 3 (2004), 1315–1318.Google Scholar
[10]Guyette, A.C.; Hunter, I.C.; Pollard, R.D.; Jachowski, D.R.: Perfectly-matched bandstop filters using lossy resonators. IEEE MTT-S Int. Microw. Symp. Digest, (2005), 517–520.Google Scholar
[11]Jachowski, D.R.: Compact frequency-agile, absorptive bandstop filters. IEEE MTT-S Int. Microw. Symp. Digest, (2005), 513–516.Google Scholar
[12]Jachowski, D.R.: Frequency-agile bandstop filter with tunable attenuation. IEEE MTT-S Int. Microw. Symp. Digest, (2009), 649–652.Google Scholar
[13]Snow, T.; Lee, J.; Chappell, W.J.: Tunable high quality-factor absorptive bandstop filter design. IEEE MTT-S Int. Microw. Symp. Digest, (2012), 1–3.Google Scholar
[14]Lee, J.; Lee, T.C.; Chappell, W.J.: Lumped-element realization of absorptive bandstop filter with anomalously high spectral isolation. IEEE Trans. Microw. Theory Tech., 60 (2012), 2424–2430.CrossRefGoogle Scholar
[15]Jachowski, D.R.: Cascadable lossy passive biquad bandstop filter. IEEE MTT-S Int. Microw. Symp. Digest, 2006, 1213–1216.Google Scholar