Browsing by Author "Jamaluddin, Mohd Haizal"

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    Complementary split ring resonator for isolation enhancement in 5G communication antenna array
    (Electromagnetics Academy, 2018-04-24) Selvaraju, Raghuraman; Jamaluddin, Mohd Haizal; Kamarudin, Muhammad Ramlee; Nasir, Jamal; Dahri, Muhammad Hashim
    A square-shaped complementary split ring resonator (CSRR) filtering structure for isolation improvement is presented in this paper. The proposed research work investigates the design and development of a simple and compact CSRR structure. In order to verify the performance of the proposed filtering element and improve the isolation among the closely placed antenna elements, arrays of configured CSRR structures are implemented between two antenna elements. An array of configured CSRR elements has been integrated with the printed antenna on the top and bottom layers. The proposed filtering elements offer an enhancement in isolation by 25 dB as compared to the simple array. The entire configuration has been simulated using the Ansoft HFSS simulator. Finally, the proposed design is fabricated and experimentally validated. In the experiment, coupling suppression of -51 dB at the operating frequency is successfully achieved, resulting in a recovery of the array pattern. The proposed antenna is highly efficient, which is suitable to be utilized for 5G communication.
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    Steerable Higher-order Mode Dielectric Resonator Antenna with Parasitic Elements for 5G Applications
    (IEEE, 2017-10-12) Shahadan, Nor Hidayu; Jamaluddin, Mohd Haizal; Kamarudin, Muhammad Ramlee; Yamada, Yoshihide; Khalily, Mohsen; Jusoh, Muzammil; Dahlan, Samsul Haimi
    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.