Serrodyne Frequency Translation Using Time-Modulated Metasurfaces

By Zhan Wu, Anthony Grbic. IEEE Transactions on Antennas and Propagation, 2019

151 citations recorded by the source corpus.

Temporally modulated metamaterials have attracted significant attention recently due to their nonreciprocal and frequency converting properties. Here, a transparent, time-modulated metasurface, which functions as a serrodyne frequency translator, is reported at $X$ -band frequencies. With a simple biasing architecture, the metasurface provides electrically tunable transmission phase that covers 360°. A sawtooth waveform is used to modulate the metasurface, allowing Doppler-like frequency translation. Modal analysis of an analogous time-modulated medium is performed to gain insight into the operation of the metasurface-based serrodyne frequency translator. Two such metasurfaces can be cascaded together to achieve magnetless devices that perform either phase or amplitude nonreciprocity.

Subfields: Aerospace Engineering, Electrical and Electronic Engineering, Electronic, Optical and Magnetic Materials

View Paper: https://www.semanticscholar.org/paper/46b85c274b9533e5588de9ab5a12c05ac1b0c0aa

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Citations in the corpus

Phase-Induced Frequency Conversion and Doppler Effect With Time-Modulated Metasurfaces (2020, background): “Finally, Wu and Grbic [50] reports interesting possible metasurface layouts derived from a serrodyne circuit [58] and the corresponding experimental verifications, showing their ability to frequency translate the illuminating monochromatic field.”
Photonics of time-varying media (2021, unknown): “(c) A 1-MHz modulation performs efficient frequency conversion through time-modulation.(102) (d) Illustration of surface-”