What question did this study set out to answer?

To design a compact metasurface antenna that achieves wideband circular polarization using dispersion-engineered unit cells.

Dispersion-engineered compact metasurface antenna achieving wideband circular polarization

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Randomized trial demonstrates wideband circular polarization in compact antennas, indicating potential for wireless communication systems.

To design a compact metasurface antenna that achieves wideband circular polarization using dispersion-engineered unit cells.
Developed a 2 × 2 truncated metasurface element as the basic resonator.
Implemented sequential rotation of four elements using a one-port aperture-coupled feeding network.
Conducted dispersion analysis to guide antenna design and enhance performance.
Achieved a measured impedance bandwidth of approximately 40% at -10 dB.
Measured axial-ratio bandwidth of 23.8%, spanning frequencies from 4.8 to 6.1 GHz.
Obtained a peak gain of 9.16 dBic with an overall antenna size of 1.12 λ0 × 1.12 λ0.

Yeh et al. (2026) studied this question.

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Randomized trial demonstrates wideband circular polarization in compact antennas, indicating potential for wireless communication systems.