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All Journal TELKOMNIKA (Telecommunication Computing Electronics and Control) Bulletin of Electrical Engineering and Informatics Indonesian Journal of Electrical Engineering and Informatics (IJEEI)
Noor Asniza Murad
Universiti Teknologi Malaysia
Computer Science & IT Electrical & Electronics Engineering

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Journal : Bulletin of Electrical Engineering and Informatics

 1 
Effects of bending on a flexible metamaterial absorber Siti Nurzulaiha Isa; Osman Ayop; Abu Sahmah Mohd Supa’at; Mohammad Kamal A. Rahim; Noor Asniza Murad; Farid Zubir; Huda A. Majid
Bulletin of Electrical Engineering and Informatics Vol 9, No 6: December 2020
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/eei.v9i6.2204

Abstract

This paper presents a study of bending a metamaterial based absorber. The study of bending is important for textile material since it can be easily crumpled. The basic absorber that is simulated for the study is an annulled circle as the top patch, and metal ground plane that sandwich a textile-based substrate. The center frequency for the absorber is 10.525 GHz. The type of bending is divided into two parts, which is convex bending and concave bending. Through series of simulations, the effects of the bending on the absorptivity and the shifting of the resonant frequency is observed. Also, the study on the change of incident and polarization angle is also included to support the basis of flexible metamaterial absorber affected by the bending.  
Substrate integrate waveguide and microstrip antennas at 28 GHz Yaqdhan Mahmood Hussein; Mohamad Kamal A. Rahim; Noor Asniza Murad; Mustafa Mohammed Jawad; Hatem O. Hanoosh; Huda A. Majid; Hussam H. A. Keriee
Bulletin of Electrical Engineering and Informatics Vol 9, No 6: December 2020
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/eei.v9i6.2190

Abstract

In this paper, two antennas are designed using substrate integrated waveguide (SIW) and microstrip technology at 28 GHz. Parametric study for both antennas is presented to demonstrate the performance at millimeter wave frequency for wireless communication network (5G application). Roger RT5880 substrates with permittivity 2.2 and loss tangent 0.0009 are used to implement the antennas with two thicknesses of 0.508 mm and 0.127 mm respectively. Both antennas have the same size of substrate 12x12 mm with a full ground plane was used. Structures designs have been done by using computer simulation technology (CST). The simulation results showed that the antenna with SIW and roger RT 5880 substrate thickness 0.508 has better performance in term of return loss and radiation pattern than the microstrip patch antenna at 28 GHz. A return loss more than -10 dB and the gain are 6.4 dB obtained with wide bandwidth range of (27.4-28.7) GHz. This proving to increase the realized gain by implementing SIW at millimeter wave band for 5G application network.  
Design of substrate integrated waveguide withMinkowski-Sierpinski fractal antenna for WBAN applications Mustafa Mohammed Jawad; Nik Noordini Nik Abd Malik; Noor Asniza Murad; Mohd Riduan Ahmad; Mona Riza Mohd Esa; Yaqdhan Mahmood Hussein
Bulletin of Electrical Engineering and Informatics Vol 9, No 6: December 2020
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/eei.v9i6.2194

Abstract

This paper presents a new design of patch antenna using Minkowski-Sierpinski fractal technique with substrate integrated waveguide (SIW) to resonate at 60 GHz. The antenna is proposed to be used for wireless body area network applications (WBAN). The proposed antenna is implemented using Rogers 5880 substrate with permittivity of (εr) of 2.2 and loss tangent is 0.0004, height of the substrate is 0.381 mm. Computer simulation technology-Microwave Studio (CST-MW) is used to simulate the proposed antenna. The simulated results show a wide bandwidth of 3.5 GHz between the ranges of (58.3-61.7) GHz, with a good return loss of more than -10 dB. A simulated gain of 7.9 dB is achieved with a linear antenna efficiency of 91%. This proposed antenna is used to improve the quality of radiation pattern, bandwidth, and gain at millimetre wave (mm-Wave) band for WBAN applications. 
Design and characterization substrate integrated waveguide antenna for WBANS application Mustafa Mohammed Jawad Abed; Nik Noordini Nik Abd Malik; Noor Asniza Murad; Mona Riza Mohd Esa; Mohd Riduan Ahmad; Ola Hussein Abed Al Radh; Ali Abdulateef Abdulbari; Yaqdhan Mahmood Hussein; Fahad Taha Al-Dhief
Bulletin of Electrical Engineering and Informatics Vol 11, No 3: June 2022
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/eei.v11i3.3492

Abstract

Millimetre-wave frequencies are defined as one of the front-runner contenders for body-centric wireless communication. In this study, low-profile antenna with the substrate integrated waveguide (SIW) has been proposed that operate in the band of the millimetre-wave frequency that has been centred at 60 GHz. The proposed antenna has been implemented with the use of the FR4 substrate with εr and tangent loss of 4.3 and 0.025, respectively. The substrate height and size are 1.5875 mm and 20 mm x 20 mm, respectively. The performance of the antenna is evaluated in off-body (free space) and on-body (human voxel model), through simulation. The proposed antenna has an ultra-wideband (UWB) and a specific absorption rate the maximal (SAR) for (10 g) is 0.0344815 W/kg and for (1 g) is 0.0184723 W/kg. It achieves 74% and 63% efficiency in the off and on-body scenario, respectively. The small antenna with the exceptional matching of impedance, low SAR, broad bandwidth, and good efficiency, a good voltage standing wave ratio good (VSWR), and good front-to-back ratio (FBR). As a result, its characteristics make it one of the best potential candidates for the simultaneous transmission and reception of data at (mm-wave) band for WBAN applications.
Co-Authors Abu Sahmah Mohd Supa’at Ali Abdulateef Abdulbari Anwer Sabah Mekki Fahad Taha Al- Dhief Fahad Taha Al-Dhief Farid Zubir Fidaus Kamaruddin Hatem O. Hanoosh Huda A. Majid Hussam H. A. Keriee Mohamad Kamal A. Rahim Mohammad Kamal A. Rahim Mohd Riduan Ahmad Mona Riza Mohd Esa Mustafa Mohammed Jawad Mustafa Mohammed Jawad Abed Nik Noordini Nik Abd Malik Nurul Mu’azzah Abdul Latiff Ola Hussein Abed Al Radh Osman Ayop Sharifah Kamilah Syed Yusof Shipun Anuar Hamzah Siti Nurzulaiha Isa Siti Nurzulaihan Isa Yaqdhan Mahmood Hussein Yaqdhan Mahmood Hussein