Back
 JEMAA  Vol.2 No.2 , February 2010
Compact Narrow Band Non-Degenerate Dual-Mode Microstrip Filter with Etched Square Lattices
Abstract: A compact narrowband non-degenerate dual-mode microstrip filter with square shape cuts is presented. The structure is developed by loading the conventional non-degenerate dual-mode resonator by open circuit stubs at two opposite corners. The filter bandwidth is controlled by only decreasing the higher cutoff frequency of the conventional type. With Square shape cuts, return loss is improved. A 20% fractional bandwidth filter is designed and implemented on FR4 material with 4.4 dielectric constant and 1.6 mm thickness at center frequency of 1.5 GHz with passband of 1.3 GHz to 1.6 GHz. Analysis has been achieved using the IE3D simulator. Experimental results do agree with simulations.
Cite this paper: nullP. Singhal, S. Mathur and R. Baral, "Compact Narrow Band Non-Degenerate Dual-Mode Microstrip Filter with Etched Square Lattices," Journal of Electromagnetic Analysis and Applications, Vol. 2 No. 2, 2010, pp. 98-103. doi: 10.4236/jemaa.2010.22014.
References

[1]   I. Wolff, “Microsrtip bandpass filter using degenerate modes of microstrip ring resonator,” Electron Letter, Vol.8, No. 12, pp. 302–303, 1972.

[2]   J. S. Hong and M. J. Lancaster, “Microstrip filters for RF/Microwave applications,” John Wiley & Sons, Inc., New York, 2001.

[3]   J. S. Hong and M. J. Lancaster, “Bandpass characteristics of new dual-mode microstrip square loop resonators,” Electronic Letter, Vol. 31, pp. 891–892, 1995.

[4]   J. C. Liu, C. S. Cheng, and L. Yao, “Dual-mode double-ring resonator for microstrip band-pass filter design,” Microwave Optical Technology Letter, Vol. 36, pp. 310–314, 2003.

[5]   J. S. Hong and M. J. Lancaster, “Microstrip bandpass filter using degenerate modes of a novel meander loop resonator,” IEEE Microwave Quided Wave Letter, Vol. 5, No. 11, pp. 371–372, 1995.

[6]   A. F. Sheta, N. Dib, and A. Mohra, “Investigation of new non degenerate dual-mode microstrip patch filter,” IEEE Proceedings-Microwave Antennas Propagation, Vol. 153, No. 1, pp. 89–95, 2006.

[7]   A. F. Sheta, “Narrow band compact non-degenerate dual-mode microstrip filter,” 25th National radio science conference (NRSC’08), Faculty of Engineering, Tanta University, 2008.

[8]   G. Mattaei, L. Young, and E. M. T. Jones, “Microwave filters, impedance matching networks, and coupling structures,” Artech House, Norwood, MA, 1980.

 
 
Top