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http://dx.doi.org/10.6109/jkiice.2018.22.2.347

Design of a Waveguide Band-Pass Filter Using a Modified H-type Resonant Iris  

Park, Kyoung-Je (School of Electronics Engineering, Kyungpook National University)
Choi, Tae-Ho (School of Electronics Engineering, Kyungpook National University)
Lee, Jong-Ig (Division of Mechatronics Engineering, Dongseo University)
Kim, Byung-Mun (Department of Electrical Electronics, Gyeongbuk Provincial College)
Cho, Young-Ki (School of Electronics Engineering, Kyungpook National University)
Publication Information
Journal of the Korea Institute of Information and Communication Engineering / v.22, no.2, 2018 , pp. 347-353 More about this Journal
Abstract
In this paper, we studied a design method for a band-pass waveguide filter with a modified H-type resonant iris (RI) placed in a thin transverse wall of a rectangular waveguide. The horizontal straight gap at the center of a conventional H-shaped iris is modified to a U-shaped one to increase the equivalent capacitance, and the equivalent inductance is improved by changing the vertical two straight slots into C-shaped ones. From some simulation results for the frequency response of the proposed RI, it was observed that the proposed iris was advantageous for reducing its size and having better cutoff, compared to typical H-shaped one. Equivalent inductance, capacitance, and quality factor of the proposed RI were extracted to analyze its performance. A third-order band pass filter using the proposed modified H-shaped iris was designed and, it was observed that the filter operated in the frequency range of 9.18-9.84 GHz with its insertion loss of 0.3 dB and return loss of 14 dB.
Keywords
Waveguide band-pass filter; equivalent LC resonant circuit; resonant iris; modified H-shaped iris;
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Times Cited By KSCI : 2  (Citation Analysis)
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