Single pole compact narrow band pass filter using periodic ground defects

Dhirendra Kumar; Asok De

doi:10.3103/S0735272713090057

Authors

Dhirendra Kumar Maharaja Agrasen Institute of Technology, India
Asok De Delhi Technological University, India

DOI:

https://doi.org/10.3103/S0735272713090057

Keywords:

microstrip band pass filter, defective ground structure, parallel coupling structure, end coupling structure

Abstract

In this paper a compact narrow band pass filter has been designed. An H-shape section of microstrip is used to get the smaller band width. The parallel lines are connected to the H section. The periodic slots are made on the ground plane of the microstrip. These defects cause the circuit more compact. The filter has been designed for center frequency 4 GHz and fractional band width 3%. The design methodology has been clearly explained. To verify the proposed technique, a filter has been fabricated and tested. A moderate matching of the results between the measured and simulated results has been observed due to some imperfection in fabrication.

References

MATTHAI, G.L.; YOUNG, L.; JONES, E.M.T. Microwave Filters, Impedance Matching Networks, and Coupling Structure. Artech House, Dedham, 1980.
HONG, JIA-SHENG; LANCASTER, M.J. Microstrip Filters for RF/Microwave Applications. New York: John Wiley & Sons Inc., 2001.
POZAR, DAVID M. Microwave Engineering, 3rd ed. Wiley, 2004.
LEE, SHENG-YUAN AND TSAI, CHIH-MING. New cross-coupled filter design using improved hairpin resonators. IEEE Trans. Microwave Theory Tech., v.48, n.12, p.2482-2490, Dec. 2000. doi: http://dx.doi.org/10.1109/22.899002">10.1109/22.899002.
ABDEL-RAHMAN, ADEL B.; VERMA, ANAND K.; BOUTEJDAR, AHMED; OMAR, A.S. Control of bandstop response of Hi-Lo microstrip low-pass filter using slot in ground plane. IEEE Trans. Microwave Theory Tech., v.52, n.3, p.1008-1013, Mar. 2004. doi: http://dx.doi.org/10.1109/TMTT.2004.823587">10.1109/TMTT.2004.823587.
LIU, H.; LI, Z.; SUN, X. Compact defected ground structure in microstrip technology. Electron. Lett., v.41, n.3, p.132-134, 2005. doi: http://dx.doi.org/10.1049/el:20057331">10.1049/el:20057331.
PARK, JONGKUK; KIM, JEONG-PHILL; NAM, SANGWOOK. Design of a novel harmonic-suppressed microstrip low-pass filter. IEEE Microwave Wireless Compon. Lett., v.17, n.6, p.424-426, June 2007. doi: http://dx.doi.org/10.1109/LMWC.2007.897789">10.1109/LMWC.2007.897789.
CHEN, J.; WENG, Z.-B.; JIAO, Y.-C.; ZHANG, F.-S. Lowpass filter design of Hilbert curve ring defected ground structure. PIER, v.70, p.269-280, 2007. doi: http://dx.doi.org/10.2528/PIER07012603">10.2528/PIER07012603.
IE3D, Zeland software.