Browsing by Author "Jusoh, M."

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    Steerable Higher-order Mode Dielectric Resonator Antenna with Parasitic Elements for 5G Applications
    (IEEE, 2017-10-12) Shahadan, N. H.; Jamaluddin, M. H.; Kamarudin, M. R.; Yamada, Y.; Khalily, M.; Jusoh, M.; Dahlan, S. H.
    This paper presents the findings of a steerable higher-order mode (TEy 1δ3) dielectric resonator antenna with parasitic elements. The beam steering was successfully achieved by switching the termination capacitor on the parasitic element. In this light, all of the dielectric resonator antennas (DRAs) have the same dielectric permittivity similar to that of 10 and was excited by a 50Ω microstrip with a narrow aperture. The effect of the mutual coupling on the radiation pattern and the reflection coefficient, as well as the array factor were investigated clearly using MATLAB ver. 2014b and ANSYS HFSS ver. 16. As the result, the antenna beam of the proposed DRA array managed to steer from -32° to +32° at 15 GHz. Furthermore, the measured antenna array showed the maximum gain of 9.25 dBi and the reflection coefficients which are less than -10 dB with the bandwidth more than 1.3 GHz, which is viewed as desirable for Device-to-Device communication (D2D) in 5G Internet of Things (IoT) applications.
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    Textile antenna with simultaneous frequency and polarization reconfiguration for WBAN
    (IEEE, 2017-12-25) Salleh, S. M.; Jusoh, M.; Ismail, A. H.; Kamarudin, M. R.; Nobles, P.; Rahim, M. K. A.; Sabapathy, T.; Osman, M. N.
    This paper proposes the design of a reconfigurable circularly polarized textile antenna. The circular polarization feature in the proposed antenna is generated by the edge-truncation of a rectangular patch and the incorporation of a slotted ground plane, whilst the frequency re-configurability feature is realized by slot size modification via the use of three embedded RF PIN diode switches. Consequently, the antenna operation can be switched between six frequencies (1.57 GHz, 1.67 GHz, 1.68 GHz, 2.43 GHz, 2.50 GHz and 2.55 GHz) depending on the seven switch configurations. The proposed antenna is validated experimentally to be operable within the WBAN, WLAN and GPS range in a compact and wearable format, with gains of up to 4.8 dBi.