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

Research Output

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Design of Passive RFID Tag Using Frequency Selective Surface with Polarization Insensitive

2023-10-06 , Saidatul Norlyana Azemi , Ibrahim N.A. , Amiza Amir , Mohd Rashidi Che Beson , Abdul Aziz M.E.

RFID is not a new technology. It has been applied in various industries such as for wearable applications. Common RFID tags especially for those that have been designed and are available are not independent of the incident receiver angle. Numerous wearable antennas on the market are only designed for a certain received angle. For example, a wearable RFID antenna is used in medical as a pulse reading detector. If the patient makes any movement, the patient's pulse reading is no longer accurate or there may be no pulse reading. Hence, the purpose of this project is to design and RFID antennas using Frequency Selective Surface, FSS for wearable applications that are independent towards the incident angle and small in size. In this project, several antennas design with Frequency Selective Surface (FSS) is proposed. The design for this antenna is round, square, and hexagonal. This antenna has an operating frequency from 2.4 GHz to 5.8GHz, bandwidth efficiency> 50%, dielectric constant 1.30, independent incident angle up to 60 degrees, and has a high gain of around 2 to 3dB.

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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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UHF RFID tag antennas for wearable devices

2023 , Saidatul Norlyana Azemi , Wan Nur Azreen Azemin , Nornikman Hassan , Amiza Amir , Mohd Rashidi Che Beson

RFID technology is evolving as one of the most popular technologies in this era of technology, fast gaining attention due to high demand from users and rapidly garnering interest in scientific and commercial areas. The frequency used will be determined by the RFID application, and the power rate will change as the frequency increases. Without a straight line of sight, the RFID tag antenna can identify distinct objects. For wearable applications, several RFID tag antennas are too big to match the chip impedance. In order to overcome that problem, a small tag RFID tag antenna for UHF is designed which aimed to be operated from 865 to 867 MHz for assembling production. Impedance matching is used to transforms the impedance of the radiating antenna, to match the chip impedance. To design and simulate the designed antenna, CST Microwave Studio software has been used in this project to get the desired result which is the return loss and gain. The design for this antenna is very simple to ease the fabrication process. Overall, the construction comprises a spiral-shaped loop RFID tag antenna printed on Roger substrate RO4350 with a height of 0.8 mm and a dielectric constant of 3.3. The simulation result of the reflection coefficient of the antenna is 866 MHz at the operating frequency.

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Mini double ridge horn antenna for free space measurement

2023 , Renukka Sivakumar , Lee Yeng Seng , Saidatul Norlyana Azemi , Ping Jack Soh

This paper presents the design of a double ridge horn antenna (DRHA) with an operating frequency of 2.4 GHz to 9.8 GHz for free space measurement. The DRHA is designed using CST Studio Suite. The DRHA is built with metallic grid sidewalls, ridges, the shield of coax, cavity back, and bell section. Furthermore, the DRHA exhibits improved radiation patterns with a maximum E-plane beamwidth of 102 degrees and H-plane beamwidth of 92 degrees, and maximum gain up to 16.3 dBi. The simulated results were analyzed and discussed in this paper. This double ridge horn antenna exhibits improved radiation patterns and gains. This shows that the double ridge horn antenna can fulfill the higher demands in antenna applications and in free space material measurement. The antenna presents desirable results throughout the operating frequency. © 2023 American Institute of Physics Inc.. All rights reserved.

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Development of U-Shape Slot Wearable Antenna for In-Body Communications

2020-03-20 , Kamaruddin N.A. , Saidatul Norlyana Azemi , Siti Zuraidah Ibrahim , Mohd Rashidi Che Beson

The ability to have a communication with devices implanted inside a human body will cause a great improvement in current wireless medical applications technology. Wireless Capsule Endoscopy (WCE) is a medical device that could send images from inside of human's intestines to the sensor outside the body. However, this device has few disadvantages like its location cannot be detected once it entered the body and it also cannot be control from outside the body. Considering these factors, an antenna that has the ability to penetrate into human body tissues for in-body communication is proposed. UWB system has considered as the solution for future in-body communication devices since current standard does not allow high data rate wireless connections between implanted nodes. Low part of UWB frequency band which is 3.1 GHz to 5.0 GHz is used in this research in order to reduce the attenuation through the body tissues as the frequency increase. The design of this antenna has taken in consideration of the propagation medium which is the human body tissues. Simulation for the designed antenna was done in CST Software. The size of this antenna is designed to be compact and wearable on human body. The substrate used for this antenna is cotton to ensure comfort once it is placed on the human body. The results that are considered in this research are the S11, directivity and gain of the antenna. Both simulation results and measured results are compared to evaluate the ability of this antenna.

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The design evolution of trio-band vivaldi antenna with meander-line-fed shape for ground penetrating radar application

2024-01 , Mohd Syahir Ahmad Azhari , Saidatul Norlyana Azemi , Mimi Diana Ghazali , Che Muhammad Nor Che Isa , Ainur Fasihah Mohd Fazilah

This paper is proposed based on considerable reviewed design techniques. It works at 200MHz, 800MHz and 1,200MHz named as “Trio-Band” with the fixed size of 300mm×300mm×1.6mm of the FR4 substrate. The antenna application is for Ground Penetrating Radar (GPR) with targeted depth range is from 10cm to 1,000cm. The combination of slotted shapes which is Half-circle, Staircase, Quarter-eclipse and Circular-Ring are applied to achieve the Trio-Band with the parametric analysis to determine the appropriate size. The final Vivaldi antenna achieves the reflective coefficient (S11) with -30.05dB (200MHz), -12.05dB (800MHz) and -15.35dB (1,200MHz) as well as 50Ω of impedance matching.

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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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LaundryMama: humanising laundry tasks using laundry management system and laundry-on-demand mobile applications

2020 , Leong Yi Mei , Ku Nurul Fazira Ku Azir , Siti Zuraidah Ibrahim , Saidatul Norlyana Azemi

Laundry Management System and Laundry-On-Demand Mobile Applications are presented in this paper. Using conventional laundry service method, customer is not informed about the laundry process stage, does not have option to arrange the preferred laundry pick up time for the deliveryman to pick up the unwashed laundry from the address provided by customer and the laundry ordering paper forms are often lost in transit between customer and admin. Therefore, a laundry management system software and laundry on demand mobile application is demanded to solve the problems. The software development is performed using an open source developing platform Android Studio IDE and Firebase Real-time Database, Authentication, Cloud Messaging and Cloud Storage. The method used to develop the software is waterfall modelling and two characters are involved, which is admin and customer. The two characters functions are separated in two different applications. A Laundry Management System Software is developed for admin to manage, make order and monitor the business. A Laundry-On-Demand Mobile Application is developed for customer to make order and monitor the order. These both applications can receive notification from each other. The data can be correctly written and read from Firebase Real-time database, Firebase Authentication, Firebase Cloud Storage. The developed software and mobile application are evaluated in term of its functionality.

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Development of multiband fractal planar inverted F antenna (F-PIFA) for mobile applications

2009 , Saidatul Norlyana Azemi

In the past few years, demand in unification of wireless hardware has propelled new development of antenna. With the advances on antenna technology, it becomes attractive to enhance the capabilities of antenna in many areas such as mobile communication and wireless application. The requirements of ubiquitous antenna are small in size, simple, robust, have a shielding mechanism, multisystem and wide bandwidth. The reason is, currently, there are five bands that are assigned for world mobile services. Due to the aforementioned issues, a novel Fractal planar inverted F antenna (F-PIFA) based on the self affinity design is presented in this research. This research is conducted in order to develop an antenna with low cost, small in size, high performance, and capable to operate at multiple frequency bands. The F-PIFA development processes include specification definition, selection of the dielectric material and construction of prototype using CST software tools. In conducting this research, the production of prototypes is divided into three stages. The first stage is to develop three different iteration of F-PIFA and to evaluate its performance. The second stage is to fabricate, measure the antenna performance as well as the SAR value. Finally, the design is investigated and improved for future works. This research has successfully produced an antenna with good efficiency without degrading bandwidth and gain of the F-PIFA. The antenna has a total dimension of 27mm x 27mm is designed and optimized in order to receive GSM (Global System for Mobile Communication) and UMTS (Universal Mobile Telecommunication System) and HiperLAN (HigH Performance Radio LAN) with the frequency range from 850-960 MHz, 1900 MHz to 2100 MHz, 1885 to 2200 MHz for 3G and 4800 MHz to 5800 MHz for HiperLAN respectively. This omni-directional antenna invented here have 65-90% efficiency with peak gain value that is 3.57 dB, and be able to produce less than 2W/kg SAR value.

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Microstrip Sensor Based on Ring Resonator Coupled with Double Square Split Ring Resonator for Solid Material Permittivity Characterization

2023-04-01 , Masrakin K. , Siti Zuraidah Ibrahim , Hasliza A Rahim @ Samsuddin , Saidatul Norlyana Azemi , Soh P.J. , Tantiviwat S.

This paper analyzes a microwave resonator sensor based on a square split-ring resonator operating at 5.122 GHz for permittivity characterization of a material under test (MUT). A single-ring square resonator edge (S-SRR) is coupled with several double-split square ring resonators to form the structure (D-SRR). The function of the S-SRR is to generate a resonant at the center frequency, whereas D-SRRs function as sensors, with their resonant frequency being very sensitive to changes in the MUT’s permittivity. In a traditional S-SRR, a gap emerges between the ring and the feed line to improve the Q-factor, but the loss increases as a result of the mismatched coupling of the feed lines. To provide adequate matching, the microstrip feed line is directly connected to the single-ring resonator in this article. The S-SRR’s operation switches from passband to stopband by generating edge coupling with dual D-SRRs located vertically on both sides of the S-SRR. The proposed sensor was designed, fabricated, and tested to effectively identify the dielectric properties of three MUTs (Taconic-TLY5, Rogers 4003C, and FR4) by measuring the microwave sensor’s resonant frequency. When the MUT is applied to the structure, the measured findings indicate a change in resonance frequency. The primary constraint of the sensor is that it can only be modeled for materials with a permittivity ranging from 1.0 to 5.0. The proposed sensors’ acceptable performance was achieved through simulation and measurement in this paper. Although the simulated and measured resonance frequencies have shifted, mathematical models have been developed to minimize the difference and obtain greater accuracy with a sensitivity of 3.27. Hence, resonance sensors offer a mechanism for characterizing the dielectric characteristics of varied permittivity of solid materials.

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