Dynamic Metasurface Reflectors Based on Coupled Resonators for Simultaneous Magnitude and Phase Control
A novel metasurface reflector unit cell based on two coupled resonators is proposed and demonstrated for real-time reconfigurable beamforming in the X-band (8-12 GHz). The unit cell is composed of a split-ring resonator (SRR) with tunable capacitance and a dipole-ring resonator (DRR) with tunable re...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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IEEE
2023-01-01
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| Series: | IEEE Access |
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| Online Access: | https://ieeexplore.ieee.org/document/10320319/ |
| _version_ | 1827650404336271360 |
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| author | Mohamed K. Emara Debidas Kundu Keigan Macdonell Leandro M. Rufail Shulabh Gupta |
| author_facet | Mohamed K. Emara Debidas Kundu Keigan Macdonell Leandro M. Rufail Shulabh Gupta |
| author_sort | Mohamed K. Emara |
| collection | DOAJ |
| description | A novel metasurface reflector unit cell based on two coupled resonators is proposed and demonstrated for real-time reconfigurable beamforming in the X-band (8-12 GHz). The unit cell is composed of a split-ring resonator (SRR) with tunable capacitance and a dipole-ring resonator (DRR) with tunable resistance, whose collective variations allow for control over the complex reflectance at a desired frequency. To gain physical insight into its working mechanism, the proposed unit cell is modeled as a coupled Lorentz oscillator using the surface susceptibility description of the unit cell. Thereafter, a metasurface reflector based on the proposed unit cell is demonstrated in full-wave simulations to achieve various beamforming examples, such as beam-steering, side-lobe level control, beam-steering with amplitude control, and multi-beam patterns, from a single normally-incident plane wave excitation. Three metasurface reflectors are fabricated to experimentally demonstrate the proposed concept; the first is based on an SRR with a varactor diode, the second is based on a DRR with a PIN diode, and the third is based on the proposed coupled SRR-DRR configuration with both varactor and PIN diodes, for simultaneous magnitude and phase control. The metasurface reflector based on the coupled resonator unit cell is experimentally demonstrated to achieve versatile beam transformations including beam-steering with amplitude control and multi-beam patterns. |
| first_indexed | 2024-03-09T20:15:45Z |
| format | Article |
| id | doaj.art-a52e6c6030ad4787bbf1174f4f102925 |
| institution | Directory Open Access Journal |
| issn | 2169-3536 |
| language | English |
| last_indexed | 2024-03-09T20:15:45Z |
| publishDate | 2023-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Access |
| spelling | doaj.art-a52e6c6030ad4787bbf1174f4f1029252023-11-24T00:01:11ZengIEEEIEEE Access2169-35362023-01-011112955212956510.1109/ACCESS.2023.333386910320319Dynamic Metasurface Reflectors Based on Coupled Resonators for Simultaneous Magnitude and Phase ControlMohamed K. Emara0https://orcid.org/0000-0002-9974-7993Debidas Kundu1https://orcid.org/0000-0001-7343-1416Keigan Macdonell2https://orcid.org/0009-0002-2272-845XLeandro M. Rufail3Shulabh Gupta4https://orcid.org/0000-0002-0264-9474Department of Electronics, Carleton University, Ottawa, CanadaDepartment of Electronics and Communication Engineering, Indraprastha Institute of Information Technology, Delhi, New Delhi, IndiaDepartment of Electronics, Carleton University, Ottawa, CanadaDepartment of Electronics, Carleton University, Ottawa, CanadaDepartment of Electronics, Carleton University, Ottawa, CanadaA novel metasurface reflector unit cell based on two coupled resonators is proposed and demonstrated for real-time reconfigurable beamforming in the X-band (8-12 GHz). The unit cell is composed of a split-ring resonator (SRR) with tunable capacitance and a dipole-ring resonator (DRR) with tunable resistance, whose collective variations allow for control over the complex reflectance at a desired frequency. To gain physical insight into its working mechanism, the proposed unit cell is modeled as a coupled Lorentz oscillator using the surface susceptibility description of the unit cell. Thereafter, a metasurface reflector based on the proposed unit cell is demonstrated in full-wave simulations to achieve various beamforming examples, such as beam-steering, side-lobe level control, beam-steering with amplitude control, and multi-beam patterns, from a single normally-incident plane wave excitation. Three metasurface reflectors are fabricated to experimentally demonstrate the proposed concept; the first is based on an SRR with a varactor diode, the second is based on a DRR with a PIN diode, and the third is based on the proposed coupled SRR-DRR configuration with both varactor and PIN diodes, for simultaneous magnitude and phase control. The metasurface reflector based on the coupled resonator unit cell is experimentally demonstrated to achieve versatile beam transformations including beam-steering with amplitude control and multi-beam patterns.https://ieeexplore.ieee.org/document/10320319/Metasurface reflectorsbeamformingside-lobe level controlbeam-steeringmulti-beam patternscomplex reflectance |
| spellingShingle | Mohamed K. Emara Debidas Kundu Keigan Macdonell Leandro M. Rufail Shulabh Gupta Dynamic Metasurface Reflectors Based on Coupled Resonators for Simultaneous Magnitude and Phase Control IEEE Access Metasurface reflectors beamforming side-lobe level control beam-steering multi-beam patterns complex reflectance |
| title | Dynamic Metasurface Reflectors Based on Coupled Resonators for Simultaneous Magnitude and Phase Control |
| title_full | Dynamic Metasurface Reflectors Based on Coupled Resonators for Simultaneous Magnitude and Phase Control |
| title_fullStr | Dynamic Metasurface Reflectors Based on Coupled Resonators for Simultaneous Magnitude and Phase Control |
| title_full_unstemmed | Dynamic Metasurface Reflectors Based on Coupled Resonators for Simultaneous Magnitude and Phase Control |
| title_short | Dynamic Metasurface Reflectors Based on Coupled Resonators for Simultaneous Magnitude and Phase Control |
| title_sort | dynamic metasurface reflectors based on coupled resonators for simultaneous magnitude and phase control |
| topic | Metasurface reflectors beamforming side-lobe level control beam-steering multi-beam patterns complex reflectance |
| url | https://ieeexplore.ieee.org/document/10320319/ |
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