Compact Low Pass Filter Design for L-Band Application
Dhirendra Kumar, Asok De
DOI: 10.4236/jemaa.2011.34018   PDF    HTML   XML   8,284 Downloads   14,886 Views   Citations


An effective technique to design compact low pass filter has been proposed in this paper. The proposed method is highly effective for L-band applications. Low impedance microstrip lines are arranged such that they work as open stubs to increase the selectivity of the filter. Using the proposed technique about 57% size reduction has been realized with sharper roll off characteristics. An empirical expression is derived to determine the dimension of resonators. For cut-off frequency of 1.7 GHz the investigated method has been fabricated and tested. There is a close agreement be-tween simulated and measured results

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D. Kumar and A. De, "Compact Low Pass Filter Design for L-Band Application," Journal of Electromagnetic Analysis and Applications, Vol. 3 No. 4, 2011, pp. 115-117. doi: 10.4236/jemaa.2011.34018.

Conflicts of Interest

The authors declare no conflicts of interest.


[1] D. M. Pozar, “Microwave Engineering,” Wiley, 2007.
[2] J. S. Hong, M. J. Lancaster, “Microstrip Filters for RF/ Microwave Applications,” John Wiley & Sons, Hoboken, 2001. doi:10.1002/0471221619
[3] I. S. Kim and S. W. Yun, “Compact LPF Using Asymmetrical Microstrip Step Disconti-nuity for Harmonic Suppression,” Electronics Letters, Vol. 41, No. 16, 2005, pp. 41-42.
[4] J. Gu and X. Sun, “Compact Lowpass Filter Using Spiral Compact Microstrip Resonant Cells,” Electronics Letters, Vol. 41, No. 19, 2005, pp. 1065-1066.
[5] K. Deng, Q. Xue and W. Che, “Improved Compact Microstrip Resonance Cell Lowpass Filter with Wide Stopband Characteristics,” Electronics Letters, Vol. 43, No. 8, 2007, pp. 463-464. doi:10.1049/el:20070028
[6] D. Ahn, J. S. Park, C. S. Kim, J. Kim, Y. Qian and T. Itoh, “A Design of Lowpass Filter Using the Novel Microstrip Defected Ground Structure,” IEEE Transactions on Microwave Theory and Techniques, Vol. 49, No. 1, January 2001, pp. 86-93. doi:10.1109/22.899965
[7] J. S. Lim, C. S. Kim, D. Ahn, Y. C. Jeong and S. Nam, “Design of Low Pass Filter Using De-fected Ground”, IEEE Transactions on Microwave Theory and Techniques, Vol. 53, No. 8, August 2005, pp. 2539-2545.
[8] J. P. Yang and W. Wu, “Compact Elliptical Low-Pass Filter Using Defected Ground Structure,” Microwave and Wireless Components Letters, Vol. 18, No. 9, September 2008, pp. 578-580.
[9] IE3D User’s Manual, Zeland Software, Inc., December 1999.

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