Abstract
In this letter, a compact wideband high-gain metasurface-lens-corrected conical horn (meta-horn) antenna is developed. A metasurface lens that has a thickness of less than 0.1 λ is developed to provide wideband transmission phase compensation with high transmission efficiency. The ultrathin lens is then used to develop a wideband high-gain horn antenna that has a shorter horn length and a large flare angle, resulting in a compact horn structure that is easy to be fabricated and mounted, and at a low cost. Simulations and experiments were conducted to demonstrate the effectiveness of the design. Measured results show that the meta-horn has a peak gain of 24.2 dBi and a 3 dB gain bandwidth of over 26%.
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