Broadband CPW-Fed Aperture Coupled Metasurface Antenna

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Original languageEnglish
Article number8627930
Pages (from-to)517-520
Journal / PublicationIEEE Antennas and Wireless Propagation Letters
Issue number3
Online published28 Jan 2019
Publication statusPublished - Mar 2019


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 λ0 × 1.28 λ0 × 0.09 λ0, where λ0 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.

Research Area(s)

  • Aperture coupling, Bandwidth enhancement, Broadband antenna, Metasurface (MTS) antenna, Patch antenna