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Gain Enhancement of Triangular Slot X-band Antenna Using Rhombic Loop Frequency Selective Surfaces

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Abstract

The paper presents boresight gain enhancement of a microstrip fed X-band triangular slot antenna using rhombic loop (RL) based frequency selective surfaces (FSSs). Two single side printed orthogonal layers of arrays of dual rhombic loops (DRLs) kept in pairs are stacked together to form cascaded dual rhombic loop (CDRL) based reflective surface which exhibits wide stop bands within X-band but with reflection phase non-linearities. The non-linearities are suppressed when both layers are printed back to back (BTB) on both sides of same dielectric substrate while they are completely eliminated when both the layers are printed on same side of the dielectric substrate to form a merged dual rhombic loop (MDRL) based FSS. A triangular slot antenna operating at 8.2 GHz is designed and integrated with these FSSs for a purpose to investigate their impact on antenna performance. Through simulations, it is found that antenna when integrated with MDRL FSS demonstrates superior performance. Later, the slot antenna and MDRL FSS are developed and integrated to perform experiments. The integrated antenna exhibits an impedance bandwidth of 650 MHz and a maximum gain of 8.5 dB in antenna boresight including 4.5 dB enhancement due to frequency selective reflectors.

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Data Availability

The simulation files and experimental data obtained during the design simulations and experiments are not publicly available due to IPR but can be shared by the corresponding author on reasonable request.

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Acknowledgements

This research work was funded in part by Department of Science and Technology, India, New Delhi (Ref. No.: SR/FST/ETI-346/2013).

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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 Electrical and Electronics Engineering, Birla Institute of Technology and Science, Pilani Campus, Pilani, Rajasthan, 333031, India

    Ashish Kumar Verma & Rahul Singhal

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  1. Ashish Kumar Verma
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  2. Rahul Singhal
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Contributions

All authors contributed to conceiving the idea and in the design, analysis, and characterization of FSS, FSS integrated with antenna. Antenna and FSS development, simulation, experiments, and analysis were performed by AKV and RS. The first draft of the manuscript was written by the corresponding author and all authors discussed it before approval of the final manuscript.

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Correspondence to Ashish Kumar Verma.

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Verma, A.K., Singhal, R. Gain Enhancement of Triangular Slot X-band Antenna Using Rhombic Loop Frequency Selective Surfaces. Wireless Pers Commun 135, 517–530 (2024). https://doi.org/10.1007/s11277-024-11080-9

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  • DOI: https://doi.org/10.1007/s11277-024-11080-9

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