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

Hong, Tae-Ui (KOREA INSTITUTE OF CERAMIC ENGINEERING AND TECHNOLOGY)
Lee, Jeong-Hun (ROTECO)
Yoon, Ki-Cheol (Kwangwoon University)
Publication Information
Journal of the Institute of Electronics Engineers of Korea TC / v.47, no.11, 2010 , pp. 84-90 More about this Journal
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) and multi-grade type structures 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 dB and 20.9 dB with bandwidth of 60 % at the center frequency of 5.8 GHz, respectively.
Keywords
SIR; broad band; coupling coefficient; compact size;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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