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Sub-terahertz transmissive reconfigurable intelligent surface for integrated beam steering and self-OOK-modulation
Dongfang Shen1, Feng Lan2,3,4, Luyang Wang1
1Sichuan THz Communication Technology Engineering Research Center, School of Electronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu, 611731, China.
Light, Science & Applications
|December 31, 2024
Summary
This study introduces a novel transmissive reconfigurable intelligent surface (TRIS) for terahertz communication. The proposed TRIS achieves high-performance beam steering and spatial-light modulation, promising for future wireless networks.
Area of Science:
- Metasurface technology
- Terahertz communication systems
- Advanced antenna arrays
Background:
- Terahertz (THz) communication demands advanced beam manipulation for 5G-A/6G networks.
- Transmissive reconfigurable intelligent surfaces (TRIS) offer advantages over reflective RIS for transceiver systems.
- Challenges remain in THz TRIS for phase shift, efficiency, and circuit complexity.
Purpose of the Study:
- To propose and demonstrate a sub-terahertz TRIS.
- To address challenges in phase shift, beam efficiency, and circuitry for THz TRIS.
- To enable high-performance beam steering and spatial-light modulation for THz communication.
Main Methods:
- Utilizing a Pancharatnam-Berry (PB) metasurface for phase shift.
- Employing Schottky diodes for self-on-off keying (OOK) modulation.
- Developing an electrically reconfigurable unit cell with phase resonators and rectangular slots.
- Conducting joint field-circuit simulations and experimental validation with a fabricated prototype.
Main Results:
- Achieved minimum insertion loss of 2.8 dB.
- Demonstrated wide W-band operation for 1-bit phase shift.
- Obtained deep OOK amplitude modulation of 12 dB.
- Showcased a wide scanning range of ±60° with low specular transmission.
- Verified point-to-point signal transmission using an integrated beam steering and spatial-light modulation platform.
Conclusions:
- The proposed TRIS offers a high-performance and cost-effective solution for terahertz communication.
- This technology is suitable for minimalist terahertz communication systems, radar, and satellite communications.
- The integrated platform demonstrates the potential for advanced THz wireless applications.
