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A symmetrical SIW-based leaky-wave antenna with continuous beam scanning from backward-to-forward through broadside

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Abstract

In this paper, a leaky-wave antenna based on substrate integrated waveguide is introduced with continuous beam scanning from backward-to-forward through broadside. A new two-part unit cell has been used to achieve the continuous beam without drop of gain in the broadside. This suppresses the open stop-band, the broadside radiation gain would be without a drop, and the side lobe level is kept low. The wide operating bandwidth is obtained, which covers from 11.7 to 19.6 GHz. It is observed that S11 is below − 10 dB from 11.5 to 20 GHz, and the average S21 is − 8.5 dB from 11.5 to 20 GHz. Scanning of this antenna is continuous and covers all angles between − 61° to + 34°. The gain in the direction of the broadside beam is equal to 14.2 dB and without a drop. The gain changes are low in the operating frequency and the average gain is 14.1 dB in this antenna, also the average side lobe level is − 12 dB. The average radiation efficiency of this proposed antenna is 73%.

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Acknowledgements

The authors appreciate the Semnan University and the members of antenna laboratory at Iran Telecommunication Research Center (ITRC) which supported and accompanied us in conducting research and experiments. Also, the authors would like to thank the honorable reviewers and editors of the manuscript for their helpful and valuable comments.

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Authors and Affiliations

  1. Electrical and Computer Engineering Faculty, Semnan University, Semnan, Iran

    Pedram Sohrabi, Pejman Rezaei, Sina Kiani & Mina Fakhr

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  1. Pedram Sohrabi
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  2. Pejman Rezaei
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  3. Sina Kiani
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  4. Mina Fakhr
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Correspondence to Sina Kiani.

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Sohrabi, P., Rezaei, P., Kiani, S. et al. A symmetrical SIW-based leaky-wave antenna with continuous beam scanning from backward-to-forward through broadside. Wireless Netw 27, 5417–5424 (2021). https://doi.org/10.1007/s11276-021-02798-6

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  • DOI: https://doi.org/10.1007/s11276-021-02798-6

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