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Browsing Journal Articles by Author "Daniel, Raphael Samson"

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    Design and analysis of open complementary split ring resonators loaded monopole antenna for multiband operation
    (Electromagnetics Academy, 2017-10-12) Daniel, Raphael Samson; Pandeeswari, Ramasamy; Raghavan, Singaravelu
    This paper describes a compact triple-band monopole antenna based on Open Complementary Split Ring Resonators (OCSRRs) for Wireless Local Area Network (WLAN) and Worldwide interoperability Microwave Access (WiMAX) applications. The monopole antenna with engraved ground plane is used to cover WLAN frequencies (2.67 GHz and 5.47 GHz). The resonant frequency of WiMAX (3.43GHz) is achieved by introducing OCSRR in the monopole antenna. In order to achieve multiband and good impedance matching, OCSRRs are introduced in the rectangular monopole antenna. The prototype antenna is fabricated on an FR-4 substrate having dimension of 29.4 × 26 × 1.6mm3. Simulated and measured results are shown in good equivalence. The dipole radiation pattern is obtained in the elevation plane (E-plane), and omnidirectional radiation pattern is obtained in the azimuthal plane (H-plane). Parametric analysis of OCSRRs is studied to attain the best results. The proposed antenna has adequate advantages, including compact size, multiband, and impedance matching.
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    Design and analysis of open complementary split ring resonators loaded monopole antenna for multiband operation
    (Electromagnetics Academy, 2017-10-12) Daniel, Raphael Samson; Pandeeswari, Ramasamy; Raghavan, Singaravelu
    This paper describes a compact triple-band monopole antenna based on Open Complementary Split Ring Resonators (OCSRRs) for Wireless Local Area Network (WLAN) and Worldwide interoperability Microwave Access (WiMAX) applications. The monopole antenna with engraved ground plane is used to cover WLAN frequencies (2.67 GHz and 5.47 GHz). The resonant frequency of WiMAX (3.43GHz) is achieved by introducing OCSRR in the monopole antenna. In order to achieve multiband and good impedance matching, OCSRRs are introduced in the rectangular monopole antenna. The prototype antenna is fabricated on an FR-4 substrate having dimension of 29.4 × 26 × 1.6mm3. Simulated and measured results are shown in good equivalence. The dipole radiation pattern is obtained in the elevation plane (E-plane), and omnidirectional radiation pattern is obtained in the azimuthal plane (H-plane). Parametric analysis of OCSRRs is studied to attain the best results. The proposed antenna has adequate advantages, including compact size, multiband, and impedance matching.
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    Metamaterial inspired structure with offset-fed microstrip line for multi band operations
    (Electromagnetics Academy, 2019-06-25) Murugeshwari, Balasubramanian; Daniel, Raphael Samson; Raghavan, Singaravelu
    A miniaturized rectangle-shaped complementary split ring radiating element with an offset-fed microstrip line is reported for multiband operations. The fabricated antenna with a compact size of 19×19×1.6 mm3 is designed on an FR-4 substrate with loss tangent tan δ = 0.02 and dielectric constant (εr) of 4.4. Multiband and antenna miniaturization are achieved by a complementary split ring radiating element, and it produces an impedance bandwidth of 40 MHz resonance at 3.03 GHz, 40 MHz resonance at 3.66 GHz, and 1470 MHz resonance at 5.5 GHz. The passband behaviour of the complementary split ring radiating element is studied in detail for obtaining multiband abilities of the miniaturized antenna. The metamaterial property of the complementary split ring radiating element is analyzed, by which the negative permittivity (ε) existence and the new resonance frequency are confirmed. The fabricated antenna shows optimum performance at the measured radiation characteristics. © 2019, Electromagnetics Academy. All rights reserved