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http://dx.doi.org/10.5394/KINPR.2006.30.5.331

Design of Lowpass Filter With the Wide Stopband Characteristics Using Microstrip Line  

Choi Dong-Muk (Research Institute of Industry Technology, National Korea Maritime University)
Shim Joon-Hwan (Department of Radio and Information Communication Engineering, National Korea Maritime University)
Jeon Joongn-Sung (Research Institute of Industry Technology, National Korea Maritime University)
Kim Dong-Il (Department of Radio and Information Communication Engineering, National Korea Maritime University)
Publication Information
Journal of Navigation and Port Research / v.30, no.5, 2006 , pp. 331-334 More about this Journal
Abstract
In this paper, we designed and fabricated the lowpass filter with the wide stopband characteristics using microp- strip line. Adding the $\lambda_g/4$ open stub at the input and output ports, we developed the L-C ladder type lowpass filter using the open stub which has wide stopband characteristics. In order to reduce the entire size qf this filter, the high impedance microstrip lines were made with the meander structure. The lowpass filter was fabricated with the cutoff frequency 2.3 GHz and its measured frequency responses agree well with the simulation results.
Keywords
L-C ladder lowpass filter; Microstrip line; Open stubs;
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  • Reference
1 Matthaei, G. L., Young, L. and T Jones, E. M. (1964), "Microwave Filters, Impedance-Matching Networks, and Coupling Structures", McGraw-Hill, New York.
2 Sonnet Suite, Ver. 8.0(2002), Sonnet Software, Liverpool, NY
3 Bahl, I. and Bhartia, P.(2003), "Microwave Solid State Circuit Design", John Wiley & Sons, New Jersey.
4 Hong, J. S. and Lancaster, M. J.(2002), "Recent progress in planar microwave filters," International Conference on Microwave and Milimeter Wave Technology Proceedings, pp. 1134-1137.
5 Garg. R, Bahl, I. J.(1978), "Microstrip Discontinuities," Int. J Electron., vol. 45, pp. 81-87.   DOI   ScienceOn
6 Hong, J. S. and Lancaster, M. J.(2000), "Design of highly selective microstrip bandpass filters with a single pair of attenuation poles at finite frequencies", IEEE Trans. Microw. Theory Tech., vol. MTT-48, no. 7, pp. 1098-1107.
7 Hong, J. S. and Lancaster, M. J.(2001), "Microwave Filters for RF/Microwave Applications", John Wiley & Sons, New York.
8 Levy, R.(1976), "Filters with single transmission zeros at real and imaginary frequencies," IEEE Trans. Microw. Theory Tech., vol. MTT-24, no 4, pp. 172-181.