Abstract
Wideband, frequency-independent sinuous antennas are useful in several applications due to their versatile polarisation capabilities and planar, compact structure. To ensure that the antenna performs optimally, its design should be optimised to achieve a consistent frequency response over its operating bandwidth. This project investigates the operating principles of the sinuous antenna to provide a comprehensive overview of how to best optimise its performance. Design characteristics of the sinuous antenna are investigated via parametric sweeps to observe how radiation patterns are affected. Mutual coupling in the sinuous arms, which decreases the consistency of frequency response and efficiency of antenna radiation, is observed for certain parameter values, and optimal values are recommended to avoid it. A linearly tapered microstrip balun and feed design are adapted for proper signal conversion and impedance matching, with discussion on possible interfering radiation affecting the overall performance of the antenna. Testing of the design prototype is done to evaluate the return losses and radiation patterns of the proposed design.
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Acknowledgements
The author would like to thank mentors Lim Zi Wei and Ang Teng Wah for their help and invaluable guidance through the course of this project.
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Ning, S.P.Y., Wei, L.Z., Wah, A.T. (2022). Wideband Sinuous Antenna Design. In: Guo, H., Ren, H., Wang, V., Chekole, E.G., Lakshmanan, U. (eds) IRC-SET 2021. Springer, Singapore. https://doi.org/10.1007/978-981-16-9869-9_27
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DOI: https://doi.org/10.1007/978-981-16-9869-9_27
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