Progress In Electromagnetics Research C
ISSN: 1937-8718
Home | Search | Notification | Authors | Submission | PIERS Home | EM Academy
Home > Vol. 7 > pp. 111-123


By D. Packiaraj, K. J. Vinoy, and A. T. Kalghatgi

Full Article PDF (216 KB)

This paper presents analysis and design of a compact ultra wide band (UWB) filter using three parallel folded coupled lines in a defected ground structure in multi-layer structure. Defected ground has been incorporated under the coupled lines of the filter to improve the coupling over a wide bandwidth. The closed form expressions for even and odd mode impedances for the coupled lines with defected ground have been obtained to design a filter of desired bandwidth with the proposed structure. Based on circuit models, an UWB filter for 3.1-10.6 GHz has been analyzed and the results have been compared using full wave simulations. Analytical results are satisfactorily matching with simulations. Filter exhibits a constant group delay of ±0.08 ns in the pass band. Size of the filter is 6.2 mm×3.4 mm×2.8 mm.

D. Packiaraj, K. J. Vinoy, and A. T. Kalghatgi, "Analysis and Design of a Compact Multi-Layer Ultra Wide Band Filter," Progress In Electromagnetics Research C, Vol. 7, 111-123, 2009.

1. Menzel, W., L. Zhu, K. Wu, and F. Bogelsack, "On the design of novel compact broadband planar filters," IEEE Trans. Microwave Theory Tech., Vol. 51, No. 2, 364-370, Feb. 2003.

2. Wang, X. H. and B. Z. Wang, "Compact broadband dual-band bandpass filters using slotted ground structures," Progress In Electromagnetics Research, Vol. 82, 151-166, 2008.

3. Razalli, M. S., A. Ismail, and M. A. Mahdi, "Novel compact microstrip ultra-wide band filter utilizing short-circuited stubs with less vias," Progress In Electromagnetics Research, Vol. 88, 91-104, 2008.

4. Moghadasi, S. M., A. R. Attari, and M. M. Mirsalehi, "Compact and wideband 1-D mushroom-like EBG filter," Progress In Electromagnetics Research, Vol. 83, 323-333, 2008.

5. Schwab, W., F. Boegelsack, and W. Menzel, "Multilayer suspended stripline and coplanar line filters," IEEE Trans. Microwave Theory Tech., Vol. 42, No. 7, 1403-1407, Jul. 1994.

6. Hsu, C.-Y., C.-Y. Chen, and C.-H. Huang, "A UWB filter using a dual-mode ring resonator with spurious pass band suppression," Microwave Journal, 130-136, Nov. 2005.

7. Ishida, H. and K. Araki, "Design and analysis of UWB band pass filter," IEEE Topical Conference on Wireless Communication Technology, Honolulu, Oct. 2003.

8. Wong, S. W. and L. Z. Zhu, "Quadruple-mode UWB band pass filter with improved out-of-band rejection," IEEE Microw. Wireless Compon. Lett., Vol. 19, No. 3, 152-154, Mar. 2009.

9. Scrantom, C. Q., "Where we are and where we're going-II," IEEE MTT-S IMS Dig., 193-200, 1999.

10. Tang, C. W., "Harmonic-suppression LTCC filter with the step impedance quarter-wavelength open stub," IEEE Trans. Microwave Theory Tech., Vol. 52, No. 2, 617-624, Jul. 2004.

11. Sheen, J. W., "LTCC-MLC duplexer for DCS-1800," IEEE Trans. Microwave Theory Tech., Vol. 47, No. 9, 1883-1890, Sep. 1999.

12. Mobbs, C. I. and J. D. Rhodes, "A generalized chebyshev suspended substrate stripline band pass filter," IEEE Trans. Microwave Theory Tech., Vol. 31, No. 5, 397-402, May 1983.

13. Zeland Software Inc., ``IE3D 11.5'', 2006.

14. Ansoft Software Inc., ``HFSS 9.2, 2007''.

© Copyright 2010 EMW Publishing. All Rights Reserved