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Bi-Directional Fabry-Perot Cavity Antenna Based on Polarization-Dependent Transmit-Reflect Metasurface
Yanfei Ren1,2, Zhenghu Xi3, Tao Wang4
1The 10th Research Institute of China Electronics Technology Group Corporation, Chengdu 250102, China.
Sensors (Basel, Switzerland)
|November 13, 2025
Summary
This study introduces a novel Fabry-Perot cavity (FPC) antenna using metasurfaces (MSs) for independent control of forward and backward electromagnetic radiation. This breakthrough enables bi-directional antennas with customizable radiation patterns for advanced communication systems.
Area of Science:
- Electromagnetics and Applied Physics
- Antenna Engineering
- Materials Science
Background:
- Metasurfaces (MSs) offer advanced control over electromagnetic (EM) radiation, but typically focus on single-directional patterns.
- Existing MS research has limitations in achieving independent control over both forward and backward radiation characteristics.
- Fabry-Perot cavity (FPC) antennas are explored for enhanced EM manipulation.
Purpose of the Study:
- To propose and validate a novel Fabry-Perot cavity (FPC) antenna design utilizing metasurfaces (MSs).
- To achieve independent control over forward and backward radiation patterns in a bi-directional antenna.
- To demonstrate the potential of this technology in advanced communication and sensing applications.
Main Methods:
- The proposed antenna employs two partially reflective metasurfaces (PRMS) forming the top and bottom of an FPC.
- Each PRMS partially reflects x-polarized waves and transmits y-polarized waves with controllable phase.
- Independent control of reflection and transmission phases allows for manipulation of bi-directional radiation patterns.
Main Results:
- Two bi-directional FPC antennas were designed and simulated, demonstrating independent control of radiation.
- Antenna 1 achieved bi-directional single-beam radiation with gains of 13.4 dBi (forward) and 12.3 dBi (backward).
- Antenna 2 exhibited bi-directional multi-beam radiation, with dual forward beams and a single backward beam, validated through fabrication and measurement.
Conclusions:
- The developed FPC antenna with MSs successfully achieves independent control of bi-directional electromagnetic radiation.
- The fabricated antenna validated the simulation results, confirming the efficacy of the proposed design.
- This technology holds significant potential for applications in multibeam antennas, multi-user communication, and integrated sensor-communication systems.
