Abstract
Frequency selection is an important property for many applications of electromagnetic (EM) waves. Frequency selective surfaces are two-dimensional objects that can transmit, reflect or absorb electromagnetic waves of certain specific frequencies due to the patterns on their surface. We are familiar with many structures which are coloured in natural settings, such as butterfly wings and peacock feathers, where the colour (frequency) selection is not due to the presence of any pigment but due to the periodicity of patterns in them. Frequency selective surfaces are a step ahead of these examples and can be used to make extremely lightweight objects such as planar lenses and the thinnest mode/polarization converters. This article gives a brief description of frequency selective surfaces and some examples of how they work, along with a list of a few of their applications.
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Acknowledgments
The work discussed here was done as the master’s project of Bhavya S. Sanghavi when he was at IIT Kanpur. All the authors acknowledge the PCB making facility and the RF & Antenna group of the EE department, IIT Kanpur, for the continued access to the fabrication and measurement facilities and the timely technical help. We thank the staff at the CELP workshop, IIT Kanpur, for the fabrication of FSS-1 design. We thank Prof. Y. N. Mohapatra for granting permission and the staff of NCFlexE, IIT Kanpur, for printing the FSS-2 design. This work was partially supported by the sponsored funding received by RV from the ISRO-STC Cell (STC0168) and SERB, Government of India (CRG/2020/002353).
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Bhavya S. Sanghavi is a PhD student at the Department of Physics at IIT Bombay.
Garima Joshi is a PhD student at the Centre for Lasers and Photonics at IIT Kanpur.
R. Vijaya is a Professor at the Department of Physics and the Centre for Lasers and Photonics at IIT Kanpur.
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Sanghavi, B.S., Joshi, G. & Vijaya, R. Frequency Selective Surfaces: An Introduction. Reson 28, 1637–1649 (2023). https://doi.org/10.1007/s12045-023-1703-4
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DOI: https://doi.org/10.1007/s12045-023-1703-4