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Physical-Layer Security for THz Communications via Orbital Angular Momentum Waves

https://doi.org/10.1109/SiPS55645.2022.9919249

Woo, Jongchan; Wasiq Khan, Muhammad Ibrahim; Ibrahim, Mohamed I.; Han, Ruonan; Chandrakasan, Anantha P.; Yazicigil, Rabia Tugce (November 2022, IEEE)
A Dual-Antenna, 263-GHz Energy Harvester in CMOS for Ultra-Miniaturized Platforms with 13.6% RF-to-DC Conversion Efficiency at −8 dBm Input Power

https://doi.org/10.1109/RFIC54546.2022.9863171

Khan, Muhammad Ibrahim; Lee, Eunseok; Monroe, Nathan M.; Chandrakasan, Anantha P.; Han, Ruonan (June 2022, 2022 IEEE Radio Frequency Integrated Circuits Symposium (RFIC))

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A 0.31-THz Orbital-Angular-Momentum (OAM) Wave Transceiver in CMOS With Bits-to-OAM Mode Mapping

https://doi.org/10.1109/JSSC.2022.3141366

Khan, Muhammad Ibrahim; Woo, Jongchan; Yi, Xiang; Ibrahim, Mohamed I.; Yazicigil, Rabia Tugce; Chandrakasan, Anantha P.; Han, Ruonan (May 2022, IEEE Journal of Solid-State Circuits)

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A 0.31THz CMOS Uniform Circular Antenna Array Enabling Generation/Detection of Waves with Orbital-Angular Momentum

https://doi.org/10.1109/RFIC51843.2021.9490402

Khan, Muhammad Ibrahim; Woo, Jongchan; Yi, Xiang; Ibrahim, Mohamed I.; Yazicigil, Rabia Tugce; Chandrakasan, Anantha; Han, Ruonan (June 2021, 2021 IEEE Radio Frequency Integrated Circuits Symposium (RFIC))
null (Ed.)
This paper reports the first chip-based demonstration (at any frequency) of a CMOS front-end that generates and receives electromagnetic waves with rotating wave phase front (namely orbital angular momentum or OAM). The chip, based on a uniform circularly placed patch antenna array at 0.31THz, transmits reconfigurable OAM modes, which are digitally switched among the m=0 (plane wave), +1 (left-handed), −1 (right-handed) and superposition (+1)+(-1) states. The chip is also reconfigurable into a receiver mode that identifies different OAM modes with >10dB rejection of unintended modes. The array, driven by only one active path, has a measured EIRP of −4.8dBm and consumes 154mW of DC power in the OAM source mode. In the receiver mode, it has a measured conversion loss of 30dB and consumes 166mW of DC power. The output OAM beam profiles and mode orthogonality are experimentally verified and a full silicon OAM link is demonstrated.
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CMOS THz-ID: A 1.6-mm² Package-Less Identification Tag Using Asymmetric Cryptography and 260-GHz Far-Field Backscatter Communication

https://doi.org/10.1109/JSSC.2020.3015717

Khan, Muhammad Ibrahim; Ibrahim, Mohamed I.; Juvekar, Chiraag S.; Jung, Wanyeong; Yazicigil, Rabia Tugce; Chandrakasan, Anantha P.; Han, Ruonan (February 2021, IEEE Journal of Solid-State Circuits)
null (Ed.)
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Emerging Terahertz Integrated Systems in Silicon

https://doi.org/10.1109/TCSI.2021.3087604

Yi, Xiang; Wang, Cheng; Hu, Zhi; Holloway, Jack W.; Khan, Muhammad Ibrahim; Ibrahim, Mohamed I.; Kim, Mina; Dogiamis, Georgios C.; Perkins, Bradford; Kaynak, Mehmet; et al (September 2021, IEEE Transactions on Circuits and Systems I: Regular Papers)
null (Ed.)
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