Figure - available from: International Journal of Antennas and Propagation
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Measured E-plane and H-plane copolarization and cross-polarization radiation patterns for the selected CWP fed circular SLR inspired triple-band antennas at three operating frequencies.
Source publication
We systemically analyze and discuss a group of miniaturized triple-band planar monopole antennas by integrating with a single loop resonator (SLR) as part of the radiation patch. Two configurations (rectangular and circular shaped radiation patches) are presented and the corresponding SLRs are integrated in the patches to contribute additional oper...
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Electromagnetic metamaterials opened the way to extraordinary manipulation of radiation. Terahertz (THz) and optical metamaterials are usually fabricated by traditional planar-patterning approaches, while the majority of practical applications require metamaterials with 3D resonators. Making arrays of precise 3D micro- and nanoresonators is still a...
Citations
... A hexagonal split-ring metamaterial-inspired dualband antenna [11], a circular CSRR inspired cross-shaped dual-band antenna [12], and a triangular SRR metamaterial-inspired dual-band antenna [13] are designed for WLAN applications. An SRR inspired antenna [14], an electric LC loading based on Koch shaped fractal metamaterial antenna [15], a metamaterial slot inspired substrate waveguide antenna [16], a complementary capacitive-loaded loop antenna [17], a metamaterial with ELC and EBG loading antenna [18], a metamaterial inspired mushroom loaded antenna [19], a dumbbell shaped metamaterial inspired antenna [20], and a modified complementary hexagonal spiral resonator inspired antenna [21] have been realized for multiband performances, which are not focused on specific applications. A narrow-band single-loop resonator integrated monopole antenna is presented [22]. ...
In this article, a novel Hexagonal Split-Ring Resonator enclosed Circular Split-Ring Resonator (HSRR-CSRR) inspired printed antenna is presented for sub-6 GHz 5G NR and IEEE 802.11ba/be applications. The proposed antenna comprises an HSRR-CSRR and a D-SHSRR metamaterial unit cell with a partial ground plane. The designed antenna is printed on a low-cost FR-4 substrate with dielectric constant εr of 4.4, thickness of 1.6 mm, and loss tangent of 0.02. An HSRR-CSRR metamaterial structure is designed to get the three distinct resonance frequencies at 3.5 GHz, 5.05 GHz, and 6.2 GHz, respectively. To cover the entire band of Sub-6 GHz 5G NR (5–6 GHz), a Double-slit Single Hexagonal Split Ring Resonator (D-SHSRR) is designed for 5.8 GHz and loaded along with the HSRR-CSRR. The operating principle, equivalent circuit, and parametric extraction of the HSRR-CSRR structure are examined. Compared to the conventional antenna, the proposed antenna has a compact size of 0.38λg × 0.52λg × 0.03λg . The antenna parameters have been investigated using Ansys HFSS 15.0 software. The measured and simulated results are in good agreement.
... The final antenna model contains a small ground [5] with a rectangular slot for matching. The SRR are presented in various shape for multi band application in antenna [24] and here a unique SRR element is embedded for radiator (monopole element) part which is connected to O-shape strip layer by four via junctions. The monopole shape is oriented from circular monopole antenna [5] and it guarantees the UWB spectrum. ...
In this article, an Ultra Wide Band (UWB) monopole antenna based on Metamaterial (MTM) unit cell with reconfigurable feature has been developed. The proposed antenna covers 3.1GHz-10.6GHz for UWB applications and it has a reconfigurable narrow-band for L-band (1.27GHz)and wireless applications. The gaps in Split Rings Resonator (SRR) element are made for the Left-hand capacitance and Ω-shape strip layer by four via junctions are used for Left-hand inductance. The antenna is printed on FR-4 low cost substrate with relative permittivity of 4.4 and thickness of 1.6 mm. The total size of the antenna is 40mm×40mm.The simulation is carried out using HFSS commercial full-wave software. In addition, the experimental results are presented and compared with simulated results. The antenna gives a maximum peak gain of6dBi with Omni-Directional radiation pattern and high efficiency of more than 70%.By embedding four switches in Ω-shape strip layer, a reconfigurable antenna has been successfully designed for wireless applications with sufficient qualification. The monopole part covers the UWB spectrum and the CRLH is responsible for the controllable narrowband resonance.The simulation and experimental results are confirmed by the numerical results.
In this work, a new concept is introduced to enhance the bandwidth of metamaterial (MTM) inspired antenna. The MTM inspired antenna mainly comprises a single split-ring resonator and a hexagonal-shaped closed ring resonator with asymmetric coplanar waveguide feed, which leads to antenna compactness. The physical dimension of the intended antenna is 17 mm × 20 mm × 1.6 mm. Due to MTM loading, the antenna achieves more compactness with ka = 0.87<1 resulting in a smaller electrical dimension of 0.18λ0 × 0.21λ0 × 0.017λ0 at 3.24 GHz. The intended antenna provides a wider bandwidth ranges from 3.06 GHz to 5.89 GHz with a percentage impedance bandwidth of 63.24% due to the merging of two resonating modes into a single passband. The proposed antenna provides a gain greater than 2 dBi for the entire working band with a maximal gain of 3.65 dBi at 5.2 GHz and radiation efficiency greater than 85% for the complete working band. Also, the antenna shows a consistent radiation pattern throughout the working band and hence the intended antenna is appropriate for 5.2/5.8 GHz WLAN IEEE 802.11 a/h/j/y, and 3.3/3.5/5.5 GHz WiMAX IEEE 802.16e applications.
