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A High-Efficiency Dual-Polarized Transmitarray Antenna with Flat Gain Performance.
Xin-Hui Jiao1, Li Zhang2, Yu Zhang2
1Institute of Information Sensing, Xidian University, Xi'an 710071, China.
Micromachines
|June 26, 2026
Summary
This study introduces a high-efficiency dual-polarized transmitarray antenna with flat gain. The novel design achieves a peak gain of 27.1 dBi and a wide 12.7% bandwidth, enhancing antenna performance.
Area of Science:
- Electromagnetics and Applied Physics
- Antenna Theory and Design
- Microwave Engineering
Background:
- Transmitarray antennas are crucial for modern wireless communication systems.
- Achieving high gain, wide bandwidth, and flat gain characteristics simultaneously remains a challenge.
- Dual-polarized designs are essential for increasing spectral efficiency.
Purpose of the Study:
- To present a novel high-efficiency dual-polarized transmitarray antenna.
- To achieve flat gain characteristics over a wide bandwidth.
- To improve radiation efficiency and phase range.
Main Methods:
- Design of a wideband triple-layer subwavelength element with a full 360° phase range.
- Incorporation of an isolated element and cross-shaped middle layer to enhance the passband.
- Utilizing four vias to induce current resonance and improve radiation efficiency.
Main Results:
- A transmitarray prototype with 185 elements was fabricated and measured.
- Achieved a peak gain of 27.1 dBi at 10.2 GHz with 58.9% radiation efficiency.
- Demonstrated a 0.5 dB gain bandwidth of 12.7% and a minimum radiation efficiency of 37% at 11.4 GHz.
Conclusions:
- The proposed dual-polarized transmitarray antenna design offers high efficiency and flat gain.
- The innovative element design and structural enhancements contribute to improved performance metrics.
- This work provides a viable solution for advanced antenna applications requiring wide bandwidth and high gain.
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