Abstract
In this letter, a printed broadband metasurface (MTS) antenna fed by an aperture coupling through a coplanar waveguide (CPW) is introduced. To achieve the wideband impedance matching, a technique of loading an MTS radiator formed by nonuniform patch elements above a stair-shape aperture is applied. The stair-shape aperture is attached to the end of the CPW. The proposed antenna is simple and low-profile in structure, which can be realized by a single-layer printed circuit board (PCB) substrate. To verify the concept, a prototype with an overall size of 1.28 λ 0 × 1.28 λ 0 × 0.09 λ 0, where λ 0 is the free-space wavelength at 7 GHz, is fabricated. The proposed antenna realizes a wide impedance bandwidth of 67.3% with reflection coefficient ≤ −10 dB and peak gain of 9.18 dBi. The measurement results agree well with the anticipation.
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