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Progress In Electromagnetics Research
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A NOVEL NARROW BANDPASS FILTER FOR IMAGE REJECTION AND CHANNEL SELECTION IN A WIRELESS SLEEP APNOEA MONITORING SYSTEM

By Y. Yang, S. M. Roy, N. C. Karmakar, and X. Zhu

Full Article PDF (1,158 KB)

Abstract:
A highly compact bandpass filter (BPF) is designed with a capacitively-coupled compact ring resonator. The ground plane is perturbed with a combination of two inter-digital and two spiral defected ground structures (DGSs), which enhance the selectivity and suppress the higher order harmonics of the BPF respectively. The filter has a selectivity of 0.22 dB/MHz, passband insertion loss (IL) of 1.55 dB and bandwidth of 61 MHz at 2.53 GHz. The proposed compact ring resonator yields a size reduction of 70.5% compared to a conventional ring resonator. This BPF is significant for wireless telemetry monitoring systems for physiological parameters including electrocardiogram (ECG), electroencephalography (EEG) and electromyography (EMG) using portable devices.

Citation:
Y. Yang, S. M. Roy, N. C. Karmakar, and X. Zhu, "A Novel Narrow Bandpass Filter for Image Rejection and Channel Selection in a Wireless Sleep Apnoea Monitoring System," Progress In Electromagnetics Research, Vol. 125, 483-501, 2012.
doi:10.2528/PIER12012907
http://www.jpier.org/PIER/pier.php?paper=12012907

References:
1. Wei, C. L., B.-F. Jia, Z.-J. Zhu, and M. Tang, "Design of different selectivity dual-mode filters with E-shaped resonator," Progress In Electromagnetics Research, Vol. 116, 517-532, 2011.

2. Ho, M.-H. and P.-F. Chen, "Suspended substrate stripline bandpass filters with source-load coupling structure using lumped and full-wave mixed approach," Progress In Electromagnetics Research, Vol. 122, 519-535, 2012.
doi:10.2528/PIER11102502

3. Xu, Z., J. Guo, C. Qian, and W.-B. Dou, "A novel quasi-elliptic waveguide transmit reject filter for Ku-band VSAT transceivers," Progress In Electromagnetics Research, Vol. 117, 393-407, 2011.

4. Guodos, S. K., Z. D. Zaharis, and T. V. Yioultsis, "Application of a differential evolution algorithm with strategy adaptation to the design of multi-band microwave filters for wireless communications ," Progress In Electromagnetics Resear, Vol. 109, 123-137, 2010.
doi:10.2528/PIER10081704

5. Cui, D., Y. Liu, Y. Wu, S. Li, and C. Yu, "A compact bandstop filter based on two meandered parallel-coupled lines," Progress In Electromagnetics Research, Vol. 121, 271-279, 2011.
doi:10.2528/PIER11061902

6. Zhang, Q.-L., W.-Y. Yin, S. He, and L.-S. Wu, "Evanescent-mode substrate integrated waveguide (SIW) filters implemented with complementary split ring resonators," Progress In Electromagnetics Research, Vol. 111, 419-432, 2011.
doi:10.2528/PIER10110307

7. Wu, Y., Y. Liu, S. Li, and C. Yu, "A new wide-stopband low-pass filter with generalized coupled-line circuit and analytical theory," Progress In Electromagnetics Research, Vol. 116, 553-567, 2011.

8. Ramirez, R. R. and N. G. Alexopoulos, "Single feed circularly polarised microstrip ring antenna and arrays," IEEE Antennas and Propagation Society International Symposium, Vol. 3, 1364-1367, 1998.

9. Gil, I., J. Garcia-Garcia, J. Bonache, F. Martin, M. Sorolla, and R. Marques, "Varactor-loaded split ring resonators for tunable notch filters at microwave frequencies," Electronics Letters, Vol. 40, No. 21, 1347-1348, 2004.
doi:10.1049/el:20046389

10. Ma, Z., C.-P. Chen, and T. Anada, "Microwave and millimeter-wave UWB banpass filters using microstrip ring resonators," 2010 International Symposium on Signals Systems and Electronics, ISSSE, 1-4, 2010.

11. Mao, R.-J. and X.-H. Tang, "Novel dual-mode bandpass filters using hexagonal loop resonators," IEEE Transactions on Microwave Theory and Techniques, Vol. 54, No. 9, 3526-3533, 2006.
doi:10.1109/TMTT.2006.881025

12. Mao, R.-J., X.-H. Tang, and F. Xiao, "Miniaturized dual-mode ring bandpass filters with patterned ground plane," IEEE Transactions on Microwave Theory and Techniques, Vol. 55, No. 7, 1539-1547, 2007.
doi:10.1109/TMTT.2007.900337

13. Chang, K., Microwave Ring Circuits and Antennas, John Wiley & Sons, Inc., 1996.

14. Yang, Y., N. C. Karmakar, and X. Zhu, "A portable wireless monitoring system for sleep apnoea diagnosis based on active RFID technology," Proc. IEEE Asia Pacific Microwave Conference, Melbourne, Dec. 6, 2011.

15. Yang, Y., S. M. Roy, N. C. Karmakar, and X. Zhu, "A novel high selectivity bandpass filter for wireless monitoring of sleep apnoea patients," Proc. IEEE Asia Pacific Microwave Conference, Melbourne, Dec. 8, 2011.

16. Karmakar, N. C., Y. Yang, and I. T. Brown, "Wireless passive radio frequency based monitoring system for sleep apnoea patient (especially paediatric patients)," Engineering and Physical Sciences in Medicine and the Australian Biomedical Engineering Conference, 51-52, 2009.

17. Getsinger, W. J., "Microstrip dispersion model," IEEE Transactions on Microwave Theory and Techniques, Vol. 21, No. 1, 34-39, 1973.
doi:10.1109/TMTT.1973.1127911

18. Kirschning, M. and R. H. Jansen, "Accurate model for effective dielectric constant of microstrip with validity up to millimetre-wave frequencies," Electronics Letters, Vol. 18, No. 6, 272-273, 1982.
doi:10.1049/el:19820186

19. Ahn, D., J. S. Park, C. S. Kim, J. Kim, Y. Qian, and T. Itoh, "A design of the low-pass filter using the novel microstrip defected ground structure," IEEE Transactions on Microwave Theory and Techniques, Vol. 49, No. 1, 86-93, 2001.
doi:10.1109/22.899965

20. Preradovic, S., I. Balbin, N. C. Karmakar, and G. F. Swiegers, "Multiresonator-based chipless RFID system for low-cost item tracking," IEEE Transactions on Microwave Theory and Techniques, Vol. 57, No. 5, 1411-1419, 2009.
doi:10.1109/TMTT.2009.2017323

21. Preradovic, S. and N. C. Karmakar, "Design of chipless RFID tag for operation on flexible laminates," IEEE Antennas and Wireless Propagation Letters, Vol. 9, 207-210, 2010.
doi:10.1109/LAWP.2010.2045872

22. Preradovic, S., S. Roy, and N. C. Karmakar, "Fully printable multi-bit chipless RFID transponder on flexible laminate," Asia Pacific Microwave Conference, 2371-2374, 2009.
doi:10.1109/APMC.2009.5385460

23. Roy, S., "Development of a frequency encoded chipless RFID tag,", Ph.D. Thesis,-Dept. of Electrical and Computer Systems Engineering, Monash University, 2008.

24. Karmakar, N. C., S. M. Roy, and I. Balbin, "Quasi-static modeling of defected ground structure," IEEE Transactions on Microwave Theory and Techniques, Vol. 54, No. 5, 2160-2168, 2006.
doi:10.1109/TMTT.2006.873633

25. Balalem, A., A. R. Ali, J. Machac, and A. Omar, "Quasi-elliptic microstrip low-pass filters using an interdigital DGS slot," IEEE Microwave and Wireless Components Letters, Vol. 17, No. 8, 586-588, 2007.
doi:10.1109/LMWC.2007.901769

26. Karmakar, N. C. and M. N. Mollah, "Investigations into nonuniform photonic-bandgap microstripline low-pass filters," IEEE Transactions on Microwave Theory and Techniques, Vol. 51, No. 2, 564-572, 2003.
doi:10.1109/TMTT.2002.807817

27. Hao, Z.-C., J.-S. Hong, J. P. Parry, and D. P. Hand, "Ultra wideband bandpass filter with multiple notch bands using nonuniform periodical slotted ground structure," IEEE Transactions on Microwave Theory and Techniques, Vol. 57, No. 12, 3080-3088, 2009.
doi:10.1109/TMTT.2009.2034230


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