Initial Study of a Sub-THz Reconfigurable Reflector Using Actuated Liquid Metal Droplet
Kong, Di; Phan, Duy Tung; Palosaari, Jakko; Juuti, Jari; Pärssinen, Aarno; Soh, Ping Jack (2024-09-30)
IEEE
30.09.2024
D. Kong, D. T. Phan, J. Palosaari, J. Juuti, A. Pärssinen and P. J. Soh, "Initial Study of a Sub-THz Reconfigurable Reflector Using Actuated Liquid Metal Droplet," 2024 IEEE International Symposium on Antennas and Propagation and INC/USNC‐URSI Radio Science Meeting (AP-S/INC-USNC-URSI), Firenze, Italy, 2024, pp. 2753-2754, doi: 10.1109/AP-S/INC-USNC-URSI52054.2024.10685964
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© 2024 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists,or reuse of any copyrighted component of this work in other works.
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Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi:oulu-202411136732
https://urn.fi/URN:NBN:fi:oulu-202411136732
Tiivistelmä
Abstract
A 2-bit reconfigurable reflector for potential microfluidic-based implementation of reconfigurable intelligent surfaces (RISs) in sub- THz band is proposed. This innovative method capitalizes on the actuation of liquid metal droplets to implement a digitally-coded reconfigurable reflector which operates at 140 GHz. Reflections are designed towards 6.4° and 9.2° using column-controlled unit cells which are reconfigured by actuating liquid metal (EGaIn) droplets filled in cavities of a commercial PCB substrate. Results validated by full-wave simulations indicate that a small height displacement of a flexible surface under each unit cell by between 20−35μm enables the 90° phase changes between the four states of the unit cells.
A 2-bit reconfigurable reflector for potential microfluidic-based implementation of reconfigurable intelligent surfaces (RISs) in sub- THz band is proposed. This innovative method capitalizes on the actuation of liquid metal droplets to implement a digitally-coded reconfigurable reflector which operates at 140 GHz. Reflections are designed towards 6.4° and 9.2° using column-controlled unit cells which are reconfigured by actuating liquid metal (EGaIn) droplets filled in cavities of a commercial PCB substrate. Results validated by full-wave simulations indicate that a small height displacement of a flexible surface under each unit cell by between 20−35μm enables the 90° phase changes between the four states of the unit cells.
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