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Spurious Passband Suppression in Compact Microstrip Rat-Race Coupler Deploying Modified Split Rings and Coupled Microstrip Lines

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Abstract

This manuscript presents the design of a size reduced microstrip rat-race (RR) coupler with improved spurious passband suppression performance. The coupler operates at 0.95 GHz, corresponding to 5G applications (sub-1 GHz 5G applications). The combined effect of coupled microstrip lines, slant connected split ring structure and the ring shaped defects offer deep suppression of harmonic signals beyond the passband till 4 GHz. The proposed coupler also offers 47.2% size reduction compared to a conventional RR coupler model.

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Authors and Affiliations

  1. Department of Electronics and Communication Engineering, St. Joseph’s Institute of Technology, Chennai, India

    Sangeetha Velan

  2. Department of Electronics and Communication Engineering, Anna University, Chennai, India

    Malathi Kanagasabai

  3. Department of Engineering Design, IIT Madras, Chennai, India

    Jayaram Kizhekke Pakkathillam

  4. Department of Electronics and Communication Engineering, Kattankulathur Campus, SRM University, Chennai, India

    Sandeep Kumar Palaniswamy & Rama Rao Tippuraj

Authors
  1. Sangeetha Velan
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  2. Malathi Kanagasabai
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  3. Jayaram Kizhekke Pakkathillam
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  4. Sandeep Kumar Palaniswamy
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  5. Rama Rao Tippuraj
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Correspondence to Sangeetha Velan.

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Velan, S., Kanagasabai, M., Pakkathillam, J.K. et al. Spurious Passband Suppression in Compact Microstrip Rat-Race Coupler Deploying Modified Split Rings and Coupled Microstrip Lines. Wireless Pers Commun 109, 2733–2740 (2019). https://doi.org/10.1007/s11277-019-06706-2

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  • DOI: https://doi.org/10.1007/s11277-019-06706-2

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