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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...
A metamaterial-based omnidirectional circularly polarized antenna array with combined zero-phase-shift line loop and dipole is presented for 2.4-GHz wireless local area networks. A four-element linear antenna array with an overall size of 66 mm × 66 mm × 258 mm shows desirable performance over the frequency range of 2.4 GHz–2.5 GHz with |S11| less than −10 dB, gain greater than 4.6 dBic, axial ratio...
The recent research and development of the antennas based on metamaterial structures such as zero-phase-shift line, composite left/right-handed, zero-index, mushroom, and high permittivity periodic structures, are discussed. The selected antennas fabricated onto the print circuit board (PCB) or low temperature co-fired ceramic (LTCC) substrate operating from 900 MHz to 60 GHz are exemplified. The...
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