Compact Broad Band-pass Filter of Parallel Coupled Structure with SIR 


Vol. 36,  No. 4, pp. 407-413, Apr.  2011


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  Abstract

In this paper, the reduced size of broad bandpass filter with parallel coupled line structure is presented. This proposed filter can control bandwidth of narrow to broadband by adjusting the coupling coefficient. The conventional filter is operated with a narrow band. If a higher bandwidth is desired than the conventional narrow bandwidth, it is hard to realize due to the coupling coefficient between feeding line and resonator. In this paper, to overcome this limitation, a proposed bandpass filter is designed with reduced size due to SIR (Stepped Impedance Resonator), U-shaped open stub with hair-pin and vertical-type structure than conventional one, and it has characteristics of adjusting bandwidth freely as per quantity of coupling coefficient. The proposed bandpass filter that, experimental results of insertion and return losses are 0.42 ㏈ and 24.5 ㏈ with bandwidth of 60 % at the center frequency of 5.8 ㎓, respectively.

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  Cite this article

[IEEE Style]

J. Lee, T. Hong, K. Yoon, "Compact Broad Band-pass Filter of Parallel Coupled Structure with SIR," The Journal of Korean Institute of Communications and Information Sciences, vol. 36, no. 4, pp. 407-413, 2011. DOI: .

[ACM Style]

Jeong-Hun Lee, Tae-Ui Hong, and Ki-Cheol Yoon. 2011. Compact Broad Band-pass Filter of Parallel Coupled Structure with SIR. The Journal of Korean Institute of Communications and Information Sciences, 36, 4, (2011), 407-413. DOI: .

[KICS Style]

Jeong-Hun Lee, Tae-Ui Hong, Ki-Cheol Yoon, "Compact Broad Band-pass Filter of Parallel Coupled Structure with SIR," The Journal of Korean Institute of Communications and Information Sciences, vol. 36, no. 4, pp. 407-413, 4. 2011.

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pISSN : 1226 - 4717
eISSN : 2287 - 3880