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High-gain end-fire radiation based on phase-reversal spoof surface plasmon polaritons
Optics Express
|September 23, 2025
Summary
This study introduces a novel method for high-gain end-fire radiation using phase-reversal spoof surface plasmon polaritons (SSPPs). This technique enhances antenna gain and efficiency by reducing wavelength and optimizing radiation units.
Area of Science:
- Electromagnetics and Wave Propagation
- Antenna Theory and Design
- Metamaterials and Plasmonics
Background:
- Traditional end-fire radiation methods face limitations in gain and efficiency.
- Spoof surface plasmon polaritons (SSPPs) offer unique waveguiding properties.
- Phase-reversal structures can enhance energy coupling but often increase size.
Purpose of the Study:
- To propose and demonstrate a high-gain end-fire radiation method using phase-reversal SSPPs.
- To improve antenna gain by reducing waveguide wavelength and increasing radiation units.
- To enhance coupling and mode conversion efficiency for superior radiation performance.
Main Methods:
- Implementation of phase-reversal SSPPs for enhanced end-fire radiation.
- Integration of specially designed branches for improved radiation capacity.
- Addition of flaring ground at the feed port for efficient mode conversion.
- Validation through both simulated and measured results.
Main Results:
- Achieved a maximum gain of 17.1 dBi for the proposed end-fire radiation structure.
- The antenna operates effectively within a size of 5.9λ0.
- Demonstrated a relative bandwidth of 12.3% with good agreement between simulation and measurement.
Conclusions:
- The proposed phase-reversal SSPPs method effectively realizes high-gain end-fire radiation.
- The design offers significant advantages in gain improvement and efficiency.
- This approach provides a promising solution for advanced antenna applications.
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