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Effect of Ripple Taper on Coupling Modes in a Coaxial Bragg Structure

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Abstract

Based on the mode-coupling method, numerical analysis is presented to demonstrate the influence of ripple taper on coupling modes on the frequency response in a coaxial Bragg structure. Results show that the interval between the band-gaps of the competing mode and the desired working mode is narrowed by use of a positive taper, but is expanded if a negative taper is employed, and the influence of the negative taper is more obviously advantage than the positive taper. The residual side-lobes of the frequency response on coupling modes can be effectively suppressed by employing the windowing-function technique. These characteristics of a tapered coaxial Bragg structure are favorable to improvement of the performance as a reflector or a filter in its application, also favorable to the mode selectivity and further weaken the excitation of unwanted spurious modes.

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Acknowledgements

This work was supported mainly by the National Natural Science Foundation of China (No.60871023) and the provincial Natural Science Foundation of Hainan (No. Hjsk2010-60).

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  1. School of Hainan University Sanya college, Sanya, Hainan, 572022, People’s Republic of China

    Xue-Yong Ding, Hong Liu & Zhen-Su Lv

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  1. Xue-Yong Ding
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  2. Hong Liu
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  3. Zhen-Su Lv
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Correspondence to Xue-Yong Ding.

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Ding, XY., Liu, H. & Lv, ZS. Effect of Ripple Taper on Coupling Modes in a Coaxial Bragg Structure. J Infrared Milli Terahz Waves 31, 1156–1163 (2010). https://doi.org/10.1007/s10762-010-9704-2

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  • DOI: https://doi.org/10.1007/s10762-010-9704-2

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