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A Wideband Multi-Polarized Microstrip Antenna with High Polarization Isolation Based on Dual-Circular Polarization
Xuenan Wang1, Hongcheng Zhou2, Xinhui Wang3
1College of Aviation Electronics and Electrical, Civil Aviation Flight University of China, Deyang 618307, China.
Micromachines
|November 27, 2025
Summary
This study introduces a novel wideband multi-polarized antenna offering high polarization isolation. The antenna efficiently generates various polarizations, crucial for advanced wireless systems.
Area of Science:
- Electromagnetics and Applied Electrophysics
- Antenna Theory and Design
Background:
- Conventional multi-polarized antennas suffer from limited overlapping bandwidth across polarization modes.
- Achieving high polarization isolation is critical for modern wireless communication systems.
Purpose of the Study:
- To propose and validate a wideband multi-polarized microstrip antenna with enhanced polarization isolation.
- To overcome the bandwidth limitations of existing multi-polarized antenna designs.
Main Methods:
- Utilizing orthogonal dual-circular polarization synthesis for single-port excitation.
- Designing, fabricating, and measuring a prototype antenna operating in the C-band.
- Analyzing performance for both linear and circular polarization modes.
Main Results:
- Achieved wide bandwidths: 66.7% for linear polarization (4-8 GHz) and 64.5% for circular polarization (4.1-8 GHz).
- Demonstrated high polarization isolation: >26 dB for linear and >15 dB for circular polarization.
- Measured results closely matched simulations, confirming antenna performance.
Conclusions:
- The proposed antenna offers multi-polarization capabilities, wide bandwidth, low profile, and high polarization isolation.
- This design meets the demands for advanced multi-functional integrated wireless systems like radar and UAVs.
- The antenna enables flexible polarization generation through dual-feed phase adjustment.
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