volume | PIER Journals

Abstract

In this paper, a novel compact band pass filter (BPF) is proposed for Global Positioning System (GPS) receivers. The proposed BPF configuration is composed of a low pass filter (LPF) section formed by the coupled line transformer connected with a radial stub and two short circuited stubs embedded within the 50 Ω microstrip line connecting the input/output (I/O) port of LPF. The lumped equivalent model of proposed BPF is also presented and analyzed. Simulation as well as experimental results shows very good in-band (pass-band) and out-of-band (≈ 7f_c (centre frequency)) characteristics. The 3 dB fractional bandwidth (FBW) is 3.2 % of f_c, thus satisfying the GPS receiver requirement and the minimum insertion loss (IL) in pass-band is 1.28 dB.

1. Chaduc, J.-M. and G. Pogorel, The Radio Spectrum, Jhon-Wiley & Sons. Inc., 2008.
doi:10.1002/9780470610947

2. Worapishet, A., K. Srisathit, and W. Surakampontorn, "Stepped-impedance coupled resonators for implementation of parallel coupled microstrip filters with spurious band suppression," IEEE Trans. on Microw. Theory and Tech., Vol. 60, No. 6, 1540-1548, 2012.
doi:10.1109/TMTT.2012.2190743 Google Scholar

3. Deng, P.-H. and J.-T. Tsai, "Design of microstrip cross-coupled bandpass filter with multiple independent designable transmission zeros using branch-line resonators," IEEE Microw. and Wire. Comp. Lett., Vol. 23, No. 5, 249-251, 2013.
doi:10.1109/LMWC.2013.2253601 Google Scholar

4. Hejazi, Z. M. and A. Omar, "Modeling and simulation of novel ultra-narrowband miniature microstrip filters for mobile and wireless critical applications," Microw. and Opt. Tech. Lett., Vol. 45, No. 1, 35-39, 2005.
doi:10.1002/mop.20715 Google Scholar

5. Esfeh, B. K., A. Ismail, R. S. A. Raja Abdullah, H. Adam, and A. R. H. Alhawari, "Compact narrowband bandpass filter using dual-mode octagonal meandered loop resonator for WiMAX application," Progress In Electromagnetics Research B, Vol. 16, 277-290, 2009.
doi:10.2528/PIERB09061601 Google Scholar

6. Lin, T.-W., J.-T. Kuo, and S.-J. Chung, "Dual-mode ring resonator bandpass filter with asymmetric inductive coupling and its miniaturization," IEEE Trans. on Microw. Theory and Tech., Vol. 60, No. 9, 2808-2814, 2012.
doi:10.1109/TMTT.2012.2205936 Google Scholar

7. Zhang, S., L. Zhu, and R. Li, "Compact quadruplet bandpass filter based on alternative J/K inverters and λ/4 resonators," IEEE Microw. and Wire. Comp. Lett., Vol. 22, No. 5, 224-226, 2012.
doi:10.1109/LMWC.2012.2193124 Google Scholar

8. Zhang, S. and L. Zhu, "Synthesis method for even-order symmetrical chebyshev bandpass filters with alternative J/K inverters and λ/4 resonators," IEEE Trans. on Microw. Theory and Tech., Vol. 61, No. 2, 808-816, 2013.
doi:10.1109/TMTT.2012.2233748 Google Scholar

9. Lin, S.-C., "New microstrip cascaded-quadruplet bandpass filter based on connected couplings and short-ended parallel-coupled line," IEEE Microw. and Wire. Comp. Lett., Vol. 24, No. 1, 2-4, 2014.
doi:10.1109/LMWC.2013.2285226 Google Scholar

10. Feng, W. and W. Che, "Bandpass filter using open/shorted dual behaviour resonators," Electronics Lett., Vol. 50, No. 8, 610-611, 2014.
doi:10.1049/el.2013.4106 Google Scholar

11. Kumar, N. and Y. K. Singh, "Compact stub-loaded open-loop BPF with enhanced stopband by introducing extra transmission zeros," Electronics Lett., Vol. 51, No. 2, 164-166, 2015.
doi:10.1049/el.2014.3523 Google Scholar

12. Zong, B.-F., G.-M. Wang, J.-G. Liang, and C. Zhou, "Compact bandpass filter with two tunable transmission zeros using hybrid resonators," IEEE Microw. and Wire. Comp. Lett., Vol. 25, No. 2, 88-90, 2015.
doi:10.1109/LMWC.2014.2382673 Google Scholar

13. Park, J.-S., J.-S. Yun, and D. Ahn, "A design of the novel coupled-line bandpass filter using defected ground structure with wide stopband performance," IEEE Trans. on Microw. Theory and Tech., Vol. 50, No. 9, 2037-2043, 2002.
doi:10.1109/TMTT.2002.802313 Google Scholar

14. Ma, K. and K. S. Yeo, "New ultra-wide stopband low-pass filter using transformed radial stubs," IEEE Trans. on Microw. Theory and Tech., Vol. 59, No. 3, 604-611, 2011.
doi:10.1109/TMTT.2010.2095031 Google Scholar

15. Ma, K., S. Mou, K.Wang, and K. S. Yeo, "Radial loaded transformed radial stub for LPF stopband extension," Progress In Electromagnetics Research Letters, Vol. 30, 125-132, 2012.
doi:10.2528/PIERL12012009 Google Scholar

16. Singh, P. K., A. K. Tiwary, and N. Gupta, "Design and development of radial stub low-pass filter with improved characteristics," 10th Int. Conf. on Microw., Antenna, Propag. and Remote Sensing (ICMARS), 13-16, Jodhpur, India, 2014. Google Scholar

17. Tan, B. T., J. J. Yu, S. T. Chew, M.-S. Leong, and B.-L. Ooi, "A miniaturized dual-mode ring bandpass filter with a new perturbation," IEEE Trans. on Microw. Theory and Tech., Vol. 53, No. 1, 343-348, 2005.
doi:10.1109/TMTT.2004.839928 Google Scholar

18. Mao, R.-J., X.-H. Tang, and F. Xiao, "Miniaturized dual-mode ring bandpass filters with patterned ground plane," IEEE Trans. on Microw. Theory and Tech., Vol. 55, No. 7, 1539-1547, 2007.
doi:10.1109/TMTT.2007.900337 Google Scholar

19. Xu, J., Y.-X. Ji, W. Wu, and C. Miao, "Design of miniaturized microstrip LPF and wideband BPF with ultra-wide stopband," IEEE Microw. and Wire. Comp. Lett., Vol. 23, No. 8, 397-399, 2013.
doi:10.1109/LMWC.2013.2269041 Google Scholar

20. Fu, Z., K. M. Lum, and W. T. Koh, "Novel bow-tie bandpass filter design using multiple radial stubs," PIERS Proceedings, 1484-1487, Moscow, Russia, Aug. 19-23, 2012. Google Scholar

21. Xu, J., W. Wu, W. Kang, and C. Miao, "Compact UWB bandpass filter with a notched band using radial stub loaded resonator," IEEE Microw. and Wire. Comp. Lett., Vol. 22, No. 7, 351-353, 2012.
doi:10.1109/LMWC.2012.2201930 Google Scholar

22. Xu, J., "Compact quasi-elliptic response wideband bandpass filter with four transmission zeros," IEEE Microw. and Wire. Comp. Lett., Vol. 25, No. 3, 169-171, 2015.
doi:10.1109/LMWC.2015.2390571 Google Scholar

23. Ma, K., S. Mou, K. Wang, and K. S. Yeo, "Embedded transformed radial stub cell for BPF with spurious-free above ten octaves," IEEE Trans. on Comp., Pack. and Manuf. Tech., Vol. 3, No. 9, 1597-1603, 2013.
doi:10.1109/TCPMT.2013.2240768 Google Scholar

24. Kwon, H., H. Lim, and B. Kang, "Design of 6–18 GHz wideband phase shifters using radial stubs," IEEE Microw. and Wire. Comp. Lett., Vol. 17, No. 3, 205-207, 2007.
doi:10.1109/LMWC.2006.890481 Google Scholar

25. Goldfarb, M. E. and R. A. Pucel, "Modeling via hole grounds in microstrip," IEEE Microw. Guided Wave Lett., Vol. 1, No. 6, 135-137, 1991.
doi:10.1109/75.91090 Google Scholar

26. Hong, J.-S. and M. J. Lancaster, Microstrip Filters for RF/Microwave Applications, Wiley, 2001.
doi:10.1002/0471221619

Dr. Prashant Kumar Singh

Dr. Anjini Kumar Tiwary

Professor Nisha Gupta