Related Experiment Video
Updated: May 28, 2026
10:35
Using Microwave and Macroscopic Samples of Dielectric Solids to Study the Photonic Properties of Disordered Photonic Bandgap Materials
Published on: September 26, 2014
Wideband Linearly Polarized Over-2-Bit Transmitarray Antenna for Millimeter-Wave Applications
Yuanjun Shen1, Xuli Feng2, Tianling Zhang1
1National Key Laboratory of Radar Detection and Sensing, Xidian University, Xi'an 710071, China.
Micromachines
|May 27, 2026
Summary
This study presents a wideband transmitarray antenna (TA) for millimeter-wave frequencies, achieving over 2-bit phase shift. The novel design demonstrates high gain and efficiency, suitable for advanced communication systems.
Area of Science:
- Electromagnetics and Wave Propagation
- Antenna Theory and Design
- Millimeter-Wave Technology
Background:
- Transmitarray antennas (TAs) are crucial for beamforming in modern wireless systems.
- Achieving high phase resolution and wide bandwidth in TAs remains a significant challenge, especially in the millimeter-wave band.
- Existing TA designs often struggle to meet the demands for precise phase control and broad operational frequencies.
Purpose of the Study:
- To design and demonstrate a wideband, linearly polarized transmitarray antenna (TA) with over 2-bit phase resolution.
- To utilize a novel receiving-transmitting (R-T) scheme for enhanced phase control in the millimeter-wave band.
- To validate the performance of the proposed TA design through simulation and experimental measurements.
Main Methods:
- The TA unit cell comprises two rectangular patches connected by a metalized via, incorporating bent branches.
- A 180° phase shift is achieved by rotating the receiving patch, while a continuous 90° phase shift is obtained by tuning connection points.
- A 20x20 TA prototype was fabricated and measured to assess its electromagnetic performance.
Main Results:
- The TA achieved an over-2-bit phase shift across the 18-30 GHz range.
- Measured 1 dB and 3 dB gain bandwidths were 24.9% (24.47-31.43 GHz) and 46.96% (20.45-33 GHz), respectively.
- Peak gain reached 25.17 dBi with a peak aperture efficiency of 55.2%, closely matching simulation results.
Conclusions:
- The developed R-T scheme transmitarray antenna successfully provides wideband operation and high phase resolution in the millimeter-wave band.
- The experimental results confirm the design's effectiveness and its potential for high-performance wireless applications.
- This work contributes a robust design methodology for advanced millimeter-wave antenna systems.
