Kumar, A and Kongari, S and Chandrakapure, Y and Sarkar, D (2024) Multi-functional metasurface as a transmissive/reflective FSS and an on-air frequency mixer. In: Scientific Reports, 14 (1).
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Abstract
In this paper, a multi-functional metasurface is proposed, which can work as a narrowband transmissive/reflective frequency selective surface (FSS) and an on-air frequency mixer based on its switching response. The metasurface is made up of unit cells with square and circular metallic loops connected by PIN diodes controlled by a bias source. In contrast to typical wideband FSSs, the structure provides 0.55 GHz of narrow stopband (a fractional bandwidth of 22) at 2 GHz in the OFF state bias. The bandstop response can be adjusted by varying the reverse bias voltage. The metasurface alternates between its functionalities when in forward bias by providing a passband at the operational frequency. The structure is compact and operates as a transmissive/reflective surface under two different bias conditions (ON and OFF). The design is angularly stable and polarization-insensitive for both TE and TM polarisation. A prototype of the designed structure is developed and the measured results correlate well with the simulated responses from the finite-difference time-domain (FDTD) method-based simulation of the circuit model. On-air frequency mixing for a wave propagating through the metasurface is demonstrated and the effects of different parameters affecting the mixing are parametrically studied through FDTD simulations and experiments. © The Author(s) 2024.
| Item Type: | Journal Article |
|---|---|
| Publication: | Scientific Reports |
| Publisher: | Nature Research |
| Additional Information: | The copyright for this article belongs to the Authors. |
| Keywords: | air; article; bandwidth; controlled study; diode; electric potential; frequency; mixer; polarization; simulation |
| Department/Centre: | Division of Electrical Sciences > Electrical Communication Engineering |
| Date Deposited: | 31 Jul 2024 05:06 |
| Last Modified: | 31 Jul 2024 05:06 |
| URI: | http://eprints.iisc.ac.in/id/eprint/85686 |
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