Design of a Millimeter-wave High-gain Folded Transmitarray Antenna
In this paper a low-profile high-gain folded transmitarray antenna at millimeter-wave band is designed.In the an-tenna an ultra-thin transmissive metasurface with polarization selection and phase full coverage control is combined with a reflective metasurface with polarization torsion characteristics.The π/4 phase compensation step is adopted to achieve low profile and im-prove antenna gain.Experiment results show that the designed antenna has a gain of 35.7 dBi at 94 GHz,an aperture efficiency of 47.4%and a 3 dB gain bandwidth of 22%.The limitation of low profile and high efficiency of millimeter-wave antenna is overcome.
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