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High isolation circularly polarized MIMO antenna based on metasurfaces.
1Xi'an Key Laboratory of Wireless Optical Communication and Network Research School of Automation and Information Engineering, Xi'an University of Technology, Xi'an, Shaanxi Province 710048, China.
Iscience
|September 16, 2024
Summary
A novel metasurface (MS) effectively reduces mutual coupling in circularly polarized (CP) antenna arrays. This metasurface enhances antenna gain while suppressing unwanted space wave coupling for improved performance.
Area of Science:
- Electromagnetics and Wave Theory
- Antenna Engineering
- Metamaterials Science
Background:
- Mutual coupling in antenna arrays degrades overall performance.
- Circularly polarized (CP) antennas are crucial for applications requiring polarization diversity.
- Metasurfaces offer novel solutions for electromagnetic wave manipulation.
Purpose of the Study:
- To present a metasurface (MS) design for decoupling circularly polarized (CP) antenna arrays.
- To investigate the effectiveness of the MS in suppressing space wave coupling.
- To demonstrate the impact of the MS on antenna gain and mutual coupling.
Main Methods:
- Design and simulation of a metasurface with periodic Jerusalem cross slots.
- Fabrication of a 2x2 CP microstrip array antenna integrated with the metasurface.
- Experimental measurement of mutual coupling and antenna gain at the center frequency.
Main Results:
- The metasurface successfully suppressed space wave coupling by altering the coupling path.
- Mutual coupling in the E-plane and H-plane was reduced by 24 dB and 16 dB, respectively.
- Antenna gain was improved by 1.5 dBi at the center frequency.
Conclusions:
- The proposed metasurface is an effective solution for reducing mutual coupling in CP antenna arrays.
- The MS design enhances antenna performance by improving isolation and increasing gain.
- This work contributes to the development of advanced antenna systems with improved efficiency and performance.
