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Quad Band Substrate Integrated Waveguide Cavity Backed Slot Antenna Using Balanced Shorting Vias

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Abstract

In this paper, low profile cavity-backed cross shaped slot antenna using substrate integrated waveguide (SIW) technology is proposed for obtaining quad-band response. In order to generate four distinct frequencies, a crossed slot is etched on the back of the dielectric substrate and three balanced shorting vias (metallic vias) are included across the longitudinal slot. Furthermore, the electric field distribution has been utilized for understanding the working principle of the proposed design. Balanced shorting vias modify the current distributions of the cavity, which consequently produces two resonant frequencies in X-band and two more resonant frequencies in Ku-band. Finally, the proposed quad-band antenna is fabricated using printed circuit board (PCB) technology and the results are experimentally verified. With the height of 0.026λ0, the measured results show that the proposed design resonates at 8.6 , 10.2 , 13.2 , and 14.8 GHz and exhibits a –10 dB impedance bandwidth more than 150 MHz at corresponding frequencies. The proposed antenna attains a peak gain of more than 6 dBi at the corresponding resonant frequencies, respectively. Those amicable characteristics, e.g., low profile, uni-directional radiation pattern, ease of fabrication, quad-band response and moderate gain, make the proposed antenna suitable for both radar and satellite systems.

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Funding

The authors declare that no funds, grants, or other support were received during the preparation of this manuscript.

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Authors and Affiliations

  1. Department of Electronics and Communication Engineering, Annamalai University, Annamalai Nagar, Chidambaram, 608002, Tamilnadu, India

    Bollavathi Lokeshwar

  2. Department of Information Technology, Annamalai University, Annamalainagar, Chidambaram, 608002, Tamilnadu, India

    Dorai Venkatasekhar

  3. Department of Electronics and Communication Engineering, R.V.R & J.C College of Engineering, Chowdavaram, Guntur, 522019, Andhra Pradesh, India

    Alapati Sudhakar

Authors
  1. Bollavathi Lokeshwar
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  2. Dorai Venkatasekhar
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  3. Alapati Sudhakar
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All authors contributed to the study conception and design. We confirm that the manuscript has been read and approved by all named authors and that there are no other persons who satisfied the criteria for authorship but are not listed. We further confirm that the order of authors listed in the manuscript has been approved by the undersigned.

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Correspondence to Bollavathi Lokeshwar.

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Lokeshwar, B., Venkatasekhar, D. & Sudhakar, A. Quad Band Substrate Integrated Waveguide Cavity Backed Slot Antenna Using Balanced Shorting Vias. Wireless Pers Commun 125, 2565–2579 (2022). https://doi.org/10.1007/s11277-022-09674-2

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  • DOI: https://doi.org/10.1007/s11277-022-09674-2

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