Design of a 5.8 ㎓ Narrow Band-pass Filter with Harmonics Suppression 


Vol. 33,  No. 2, pp. 167-173, Feb.  2008


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  Abstract

In this paper, the flexible narrow bandpass filters (BPFs) with λg/4 short and λg/2 open stubs by microstrip line on duroid substrate are suggested. These BPFs with narrow bandwidth show flexible bandwidth with variation of the position of the stubs using the Qe (external quality factor) without changing the impedance value at microwave range. On the other hand, by replacing the series quarter-wavelength connecting lines with the equivalent T-shaped line of bandstop filter(BSF), the compact stub bandpass filter with harmonics suppression can be realized. The BPF with λg/4 short stubs shows the insertion loss of 2.1 ㏈ and the return loss of 18 ㏈ and BPF with λg/2 open stubs shows the insertion loss of 1.2 ㏈ and the return loss of 21.9 ㏈ at the center frequency of 5.8 GHz and the bandwidth of 10 %.

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  Cite this article

[IEEE Style]

K. Yoon and J. Lee, "Design of a 5.8 ㎓ Narrow Band-pass Filter with Harmonics Suppression," The Journal of Korean Institute of Communications and Information Sciences, vol. 33, no. 2, pp. 167-173, 2008. DOI: .

[ACM Style]

Ki-Cheol Yoon and Jong-Chul Lee. 2008. Design of a 5.8 ㎓ Narrow Band-pass Filter with Harmonics Suppression. The Journal of Korean Institute of Communications and Information Sciences, 33, 2, (2008), 167-173. DOI: .

[KICS Style]

Ki-Cheol Yoon and Jong-Chul Lee, "Design of a 5.8 ㎓ Narrow Band-pass Filter with Harmonics Suppression," The Journal of Korean Institute of Communications and Information Sciences, vol. 33, no. 2, pp. 167-173, 2. 2008.

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pISSN : 1226 - 4717
eISSN : 2287 - 3880