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A Millimeter-Wave Broadband Multi-Mode Substrate-Integrated Gap Waveguide Traveling-Wave Antenna with Orbit Angular
Qiu-Hua Lin1, Da Hou1,2, Lihui Wang1
1School of Electronics and Communication Engineering, Sun Yat-sen University, Shenzhen 518107, China.
Sensors (Basel, Switzerland)
|February 24, 2024
Summary
This study introduces a novel millimeter-wave antenna using substrate-integrated gap waveguides to generate orbital angular momentum (OAM) modes for enhanced channel capacity. The proposed antenna design demonstrates broadband operation and the ability to radiate multiple OAM modes.
Area of Science:
- Electromagnetics and Wave Propagation
- Antenna Theory and Design
- Millimeter-wave Technology
Background:
- Orbital Angular Momentum (OAM) offers a new dimension for increasing channel capacity in communication systems.
- Substrate-integrated gap waveguides (SIGWs) provide a platform for novel electromagnetic wave manipulation.
- Millimeter-wave frequencies are crucial for high-bandwidth communication applications.
Purpose of the Study:
- To propose and analyze a millimeter-wave broadband multi-mode waveguide traveling-wave antenna capable of generating OAM.
- To leverage SIGW characteristics for phase delay and coupling to radiate OAM modes.
- To investigate the antenna's performance in terms of bandwidth, VSWR, and radiated OAM modes.
Main Methods:
- Innovative design of a traveling-wave antenna utilizing SIGWs.
- Integration of 'L'-shaped and 'Π'-shaped slot radiate elements for OAM and spin angular momentum (SAM) generation.
- Electromagnetic simulation to evaluate antenna performance and mode characteristics.
Main Results:
- The antenna operates at 28 GHz with a -10 dB fractional bandwidth of 35.7% (25.50–35.85 GHz).
- Demonstrated radiation of linear polarization (LP), OAM modes (l=2 CP-OAM, l=1 & l=2 hybrid OAM), and SAM (L/RHCP) modes across different frequency bands.
- Waveguide energy transmission bandwidth from 26.10 to 38.46 GHz with minimal loss (|S21| ≤ 2 dB).
Conclusions:
- The proposed SIGW traveling-wave antenna effectively generates multiple OAM modes at millimeter-wave frequencies.
- The design shows significant potential for enhancing channel capacity in future communication systems.
- The antenna exhibits broadband characteristics and efficient energy transmission suitable for high-speed wireless applications.
Keywords:
broadband multi-mode antennamillimeter-waveorbit angular momentum (OAM)phase differencesubstrate-integrated gap waveguide (SIGW)More Related Videos
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