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All Journal Indonesian Journal of Electrical Engineering and Computer Science
S. Z. N. Zool Ambia
Universiti Teknologi Malaysia (UTM)

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Dual resonance element for broadband reflectarray antenna M. Hashim Dahri; M.R. Kamaruddin; M.H. Jamaluddin; M. Inam; S. Z. N. Zool Ambia; N. Shafie
Indonesian Journal of Electrical Engineering and Computer Science Vol 13, No 2: February 2019
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijeecs.v13.i2.pp556-561

Abstract

A dual resonance reflectarray unit cell element has been proposed which evolved from a square patch element to enhance its bandwidth performance. A bend in the width of the element is used to modify its dimensions and surface currents for broadband operation. The results have been analyzed in the frequency band of 24 GHz to 28 GHz. Two different combinations of its dimensions are selected for the investigating of its various performance parameters. A maximum static phase range of 432° and 255° have been obtained with selected dimensions. The wide-band features of proposed unit cell element can be used particularly to design a broadband reflectarray antenna for future fast communication systems.
Evolution of H-shaped dielectric resonator antenna for 5G applications S. Z. N. Zool Ambia; M. H. Jamaluddin; M.R. Kamarudin; J. Nasir; R.R. Selvaraju
Indonesian Journal of Electrical Engineering and Computer Science Vol 13, No 2: February 2019
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijeecs.v13.i2.pp562-568

Abstract

In this paper, an H-shaped Dielectric Resonator Antenna (DRA) with a Microstrip Slot Aperture (MSA) is presented and investigated at 26 GHz. In order to widen the bandwidth operation, the slot aperture feeding technique is applied. The designed DRA with relative permittivity, εr of 10 is mounted on a Duroid substrate with a relative permittivity, εr of 2.2, loss tangent of 0.0009 and a thickness of 0.254mm. The proposed antenna with overall size of 20 x 20 x 5.27 mm3 achieves good impedance matching, gain of 7.61 dB and good radiation patterns. An impedance bandwidth of 21.44%, covering the frequency range from 24.72 GHz to 30.62 GHz made the antenna has potential for millimeter wave and 5G applications.
Co-Authors J. Nasir M. H. Jamaluddin M. Hashim Dahri M. Inam M.H. Jamaluddin M.R. Kamaruddin M.R. Kamarudin N. Shafie R.R. Selvaraju