Efficiency of metasurface antennas
WebFeb 11, 2024 · The full-wave simulation shows that the efficiency of the flat metasurface energy harvester with thickness of 0.004λ 0 at 5.33 GHz (WiFi) is up to 0.86 for normal radiation. It is 0.72 and 0.62 for 70° oblique angle of incidence from H- and E-plane. WebMay 21, 2024 · The designed metasurface is 17 × 17 array of four-layer unit cells of 0.25 λ0 × 0.25 λ0 size at 5.8 GHz. The finally designed antenna with circularly polarised quad-beam has the peak gain of 12.1 dBic at 5.72 GHz, and the aperture efficiency and 1 dB gain bandwidth were found to be 30.7% and 3.5%∼5.5% at four beams, respectively. 1 …
Efficiency of metasurface antennas
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WebSep 1, 2024 · A programmable coding antenna based on active metasurface elements (AMSEs) is proposed in this study, allowing scanning and state switching of multiple beams in real time. To obtain the planar array phase distribution in quick response, the aperture field superposition and discretization procedures are investigated. WebThis paper studies the energy efficiency (EE) optimization of a single-cell multiuser massive multiple-input multiple-output (MIMO) uplink system, where configu Dynamic …
WebIn this article, conformal linear-to-circular (LTC) polarization conversion metasurface (MS) in transmission mode is engineered and fabricated. The conformal MS is cylinder-shaped with curved elements bent on the cylinder wall. First, the anisotropic element with the capability of LTC polarization conversion in high transmission efficiency is designed and … WebFeb 28, 2024 · In Optical Materials Express, researchers report that lab tests of a new metasurface-based antenna that can harvest 100 microwatts of power, enough to power simple devices, from low power radio waves. This represents an important step toward making it practical to harvest energy from radio waves, such as the ones used in cell …
WebFig. 1. Top view and cross section showing the metasurface, feed structure, and the antenna beam produced from the holographic diffraction of the guided feed wave against the metasurface. Figure 1 shows that the scattering elements in the metasurface radiate with a periodicity that corresponds to the scan angle of the beam. WebSep 10, 2024 · 4.1 Metasurface. In antenna array based RIS, the structure of the radio surface is fixed, which imposes a limited control on the RIS. However, metasurfaces, which are electrically thin and dense two-dimensional arrays of structural elements possessing the desired properties granted by their constitutive elements, allow a more flexible control on …
WebMay 3, 2024 · This near-field correction achieved by the AWPCS has considerably increased the aperture efficiency of the antenna system to 66%, which is 2.7 times grater than that of the bare horn antenna....
WebThe capacitive grid of the metasurface is formed by a row of Instead, we apply phase modulations as illustrated in Figure 2a. metallic patches with width w = 27.2 mm and … dr. timothy o\u0027mara wakefield riWebOct 28, 2024 · In this document, a 1-bit transmissive programable metasurface with high efficiency is proposed for the cost-effective beam-steering phased array. The designed transmissive metasurface is made … columbia university msc financeWebMay 1, 2024 · The overall thickness of the proposed antenna is 0.27λ. The proposed antenna is fabricated and tested. The configuration achieves dual-band features with … dr. timothy o\u0027byrne staten island cardiologyWebMar 2, 2024 · As examples, one- and two-dimensional metasurface-based array antennas are elaborately designed and fabricated, in which good radiation performance and broadband low RCSs are achieved simultaneously. Both numerical simulations and experimental results verify the effectiveness of the proposed method. dr timothy optomotristWebFeb 14, 2024 · Abstract. In this research article, a microstrip printed antenna operating at 60 GHz with an ultrathin triple-layer FSS metasurface is presented. Two different FSS … dr timothy o\u0027connor resurrectionWebDec 1, 2024 · A circularly polarized, high aperture efficiency antenna based on metasurface (MTS), inexpensively fabricated using a standard printed circuit board … dr timothy o\u0027nealWebHuygens’ metasurfaces, typically designed using sub-wavelength unit cells, allow the arbitrary control of electromagnetic waves. Two well-known unit-cell topologies are the wire-loop and... dr timothy o\\u0027neill clarkston