Abstract
In this paper, a wideband high aperture efficiency transmitarray antenna (TA) with low cross polarization is proposed. The proposed TA unit cell is a triple-layer patches separated by 0.21-wavelength air gap, and this unit cell can achieve about 360o transmission phase range within -3dB transmission loss. The measured aperture efficiency, gain and -1dB gain bandwidth of the TA operating at 16 GHz are 64%, 26.9dBi and 14% from 15.2GHz to 17.5GHz, respectively. The proposed design has the advantages of the highest aperture efficiency, and lowest cross-polarization below -45dB compared with recently published related works. The developed unit cell has symmetric configuration, so it can also be applied to the design of dual-polarized TA design. The TA array has low fabrication difficulty and cost, and is suitable for high-gain and low cross-polarization application.
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