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Rigorous Analysis of Wide-Band Directional Coupler Using Π-Shape Dielectric Waveguide

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Abstract

Wide-band directional couplers using П-Shape dielectric waveguide in the parallel coupling region are investigated in detail by a rigorous mode matching method, both the eigenvalue problem of the coupled П-guide and the coupling characteristics of curved transition structure are solved accurately. Particular attention is directed toward the effects of transition waveguides on the scattering and coupling performance of the coupler to give useful guidelines for the design and optimization consideration. Finally, a 3-dB directional coupler is proposed with quite constant coupling factor (within ±0.5dB) throughout a wide frequency band from 34 GHz to 40 GHz.

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Acknowledgment

The work described in this paper is supported by the National Natural Science Foundation of China (No. 60531020).

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Authors and Affiliations

  1. Department of Electronics Engineering and Information Science, University of Science & Technology of China, Hefei, P.R.China, 230027

    Meng Huang & Shanjia Xu

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  1. Meng Huang
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  2. Shanjia Xu
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Correspondence to Meng Huang.

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Huang, M., Xu, S. Rigorous Analysis of Wide-Band Directional Coupler Using Π-Shape Dielectric Waveguide. J Infrared Milli Terahz Waves 30, 439–452 (2009). https://doi.org/10.1007/s10762-009-9472-z

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  • DOI: https://doi.org/10.1007/s10762-009-9472-z

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