Abstract
Among various flat lens devices, meta-surfaces have presented great performance in a versatile and compact platform for manipulating the polarization, phase and amplitude of microwave. However, most meta-surface could only give the best achievement in the exact polarization. Here, this review propose a new antenna lens which was designed to realize achromatic meta-surface devices successfully enhanced gain of muti-polarization patch antenna. A four polarization gain increasing meta-surface was implemented, which was able to locate in the near field of patch antenna without affecting the polarization character. Moreover, because of meta-surface planar nature, patch antenna lens enable the construction of integrated metamaterial circuits as well as easy coupling with other electronic elements. Through this approach, various flat antenna lens with different polarization gain enhancing devices that were previously impossible can be realized, which will allow innovation in patch antenna application.
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