Saidatul Norlyana Azemi
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Preferred name
Saidatul Norlyana Azemi
Official Name
Saidatul Norlyana, Azemi
Alternative Name
Azemi, Saidatu Norlyana
Azemi, S. N.
Azemi, S. A.
Saidatul, N. A.
Azemi, Saidatul N.
Azemi, Saidatul Norlyna
Main Affiliation
Scopus Author ID
55204806400
Researcher ID
DUZ-0499-2022

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An ultrawideband full flexible 4 elements DGS based MIMO antenna for Sub-6 GHz wearable applications

2024-03 , Bikash Chandra Sahoo , Azremi Abdullah Al-Hadi , Saidatul Norlyana Azemi , Surentiran Padmanathan , Sadia Afroz , Wee Fwen Hoon , Soh Ping Jack , Che Muhammad Nor Che Isa , Soumya Ranjan Mishra

In this article, a compact wearable quad element MIMO antenna is presented operating at 4.5 GHz for 5G n77, n78, and n79 bands with the use of polyester substrate with a size of 80 × 82 × 0.4 mm3. Here T-shaped defected ground structure (DGS) technique has been utilized to improve the impedance bandwidth along with the reduction of the mutual coupling between the radiating elements. The antenna is evaluated in terms of reflection coefficient, gain, efficiency, and radiation pattern. The proposed MIMO antenna attained a maximum simulated gain of 4.3 dBi, and an efficiency of 96 % in the resonating band.

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Compact full flexible vivaldi antenna for 3.5 GHz wearable applications

2023 , Bikash Chandra Sahoo , Azremi Abdullah Al-Hadi , Saidatul Norlyana Azemi , Wee Fwen Hoon , Surentiran Padmanathan , Sadia Afroz , Che Muhammad Nor Che Isa , Yen San Loh , Muhammad Syahir Mahyuddin , Lai Ming Lim , Zambri Samsudin , Idris Mansor , Soh Ping Jack

In this paper, a compact wearable Vivaldi antenna resonating at 3.5 GHz is proposed for 5G n77, and n78 bands. It is designed upon a flexible polyester substrate having dielectric constant (εr) of 1.34 and loss tangent (tan δ) of 0.005. The antenna parameters were optimized via parametric analyses using CST software with a size of 45 × 45 × 0.4 mm3 (length × width × height). The antenna is evaluated in terms of reflection coefficient, gain, efficiency, radiation pattern, and surface current density. This antenna attained a maximum simulated gain of 4.7 dBi, and an efficiency of 98 % in the resonating band.

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A 3.5 GHz wearable antipodal vivaldi antenna for 5G applications

2024-01 , Sadia Afroz , Azremi Abdullah Al-Hadi , Surentiran Padmanathan , Saidatul Norlyana Azemi , Wee Fwen Hoon , Bikash Chandra Sahoo , Yen San Loh , Che Muhammad Nor Che Isa , Lun Hao Tung , Lai Ming Lim , Zambri Samsudin , Idris Mansor , Soh Ping Jack

This paper represents a wideband wearable antenna for 5G applications. In this proposed design, an antipodal vivaldi antenna structure is implemented on a polyimide and polyester combined substrate. The 120 × 95 × 0.82 mm3 sized antenna acquired a wide bandwidth of 910 MHz with a realized gain of 5.42 dBi and efficiency of 96 percent.

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ABCS antenna for wireless body area network at 26 GHz

2023 , Muhammad Afifi , Saidatul Norlyana Azemi , Amiza Amir , Soh Ping Jack

The paper presents the design and investigation of a wearable textile antenna (receiver) and transmitter antenna operating in the wireless body area network (WBAN) of 26 GHz band for 5G mobile networks. The wearable antenna with an overall size of 30 mm x 40 mm x 1.26 mm achieves good impedance matching, high gain, and directive radiation pattern. Both antennas were designed using CST Microwave Studio to validate the simulation results. A rectangular radiating patch comprises a Shieldit electrotextile situated on one side of a non-conductive substrate panel with the ground plane. The bed sheet cotton fabric is used as the non-conductive substrate due to its widespread use in daily clothing with a dielectric constant is 3.2 and the loss tangent is 0.0027. In addition, the wearable antenna successfully achieved the high gain and efficiency of 12 dB and 90.83% respectively. Moreover, the antenna operating at 26 GHz with -40.48 dB return loss, which is less than the -10 dB in requirement. The simulated results show that this proposed wearable antenna is best suited for wireless body area network applications. Hence, the wearable antenna is simple, compact and easy to fabricate.

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Horn Antenna Gain Enhancement using 3-D Printed Dielectric Lens for Dielectric Properties Measurement

2023 , Renukka Sivakumar , Saidatul Norlyana Azemi , Azremi Abdullah Al-Hadi , Zahari Awang Ahmad , Kok Yeow You , Lee Yeng Seng , Soh Ping Jack

A 3-D printed dielectric lens for gain enhancement of horn antenna from 18 GHz to 40 GHz is presented in this paper. Fused deposition modelling (FDM) is used to fabricate the Acrylonitrile butadiene styrene (ABS) lensas it is one of the well-known 3-D printing techniques. The results with and without dielectric lens are analyzed and compared from the simulation. From simulation results with thedielectric lens, a maximum gain of 26.7 dBi was achieved. The dielectric lens of 21.72 mm thickness was able to provide a gain enhancement up to 26.7 dBi when compared to the simulation result without the dielectric lens. The proposed dielectric lens can improve the gain of the horn antenna as good agreement between literature, simulation and measurement was achieved.

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