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A Design of Compact Ultra Wideband Coupler for Butler Matrix

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Abstract

A design of 3 dB compact ultra wideband (UWB) coupler for a 4 × 4 Butler Matrix, which is operating between 3 and 11 GHz frequency range, is presented in this paper. The proposed design uses multilayer technology that allows having a compact and broad bandwidth coupler. The design uses elliptically shaped broadside coupled strips and a slot created in a common ground plane of two dielectric substrates with the same shape. The design then being fabricated on 0.8 mm thick FR4 substrates and it occupies the dimension of 30 mm × 15 mm. The simulation and experimental results show a good performance in terms of bandwidth, which covers the entire UWB operation. In addition, detailed analysis of air gap effect for S-parameters and phase difference of the designed coupler is presented in this study.

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Authors and Affiliations

  1. Faculty of Electrical Engineering, Wireless Communication Centre, Universiti Teknologi Malaysia, 81310, Skudai, Johor, Malaysia

    Nor Salehah Binti Muklas, Sharul Kamal Abdul Rahim, Norhudah Seman & Dyg Norkhairunnisa Abang Zaidel

  2. Faculty of Engineering and Technology, Multimedia University, Jalan Ayer Keroh Lama, Bukit Beruang, 75450, Melaka, Malaysia

    Kim Geok Tan

  3. Department of Electrical Engineering, Faculty of Engineering, University of Malaya, 50603, Kuala Lumpur, Malaysia

    Ahmed Wasif Reza

Authors
  1. Nor Salehah Binti Muklas
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  2. Sharul Kamal Abdul Rahim
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  3. Norhudah Seman
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  4. Dyg Norkhairunnisa Abang Zaidel
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  5. Kim Geok Tan
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  6. Ahmed Wasif Reza
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Correspondence to Ahmed Wasif Reza.

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Binti Muklas, N.S., Rahim, S.K.A., Seman, N. et al. A Design of Compact Ultra Wideband Coupler for Butler Matrix. Wireless Pers Commun 70, 915–926 (2013). https://doi.org/10.1007/s11277-012-0729-9

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  • DOI: https://doi.org/10.1007/s11277-012-0729-9

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