Miniaturized Wideband Metasurface Antennas

作者：Liu, Wei E. I.^*; Chen, Zhi Ning; Qing, Xianming; Shi, Jin; Lin, Feng Han

来源：IEEE Transactions on Antennas and Propagation, 2017, 65(12): 7345-7349.

DOI：10.1109/TAP.2017.2761550

• Aperture coupling
• broadband antenna
• capacitor-loaded patch cell
• low profile
• metamaterial
• patch antenna
• transmission-line model
• wide bandwidth

The single- and dual-layer metasurfaces are proposed to miniaturize a low-profile wideband antenna. The single- and dual-layer metasurfaces consist of one and two square patch arrays, respectively, both supported by grounded dielectric substrate to form the waveguided metamaterials. After retrieving the effective refractive index along the propagation direction in the waveguided metamaterial, the effective propagation constant is subsequently derived to initially estimate the resonant frequencies of the dual-mode antenna. With the increased effective refractive index, both the proposed antennas realize the gain greater than 6.5 dBi over the bandwidth of similar to 30% with a reduced radiating aperture of 0.46 lambda(0) x 0.46 lambda(0) and a thickness of 0.06 lambda(0) (lambda(0) is the free-space wavelength at 5.5 GHz). Moreover, the dual-layer metasurface provides more freedom to increase the effective refractive index with achievable gap widths compared with the single-layer metasurface.

• 出版日期2017-12
• 单位南通大学