UniMAP RIS :: Browsing by Type "Conference Proceeding"

Publication

1-point fractional adams method for solving single order differential equations with fractional delay

( 2023-11-17)

Zakaria N.N.

;

Senu N.

This paper deals with fractional delay differential equations (FDDE) of single order with fractional Caputo derivatives using the 1-point fractional Adams method. The proposed method is a predictor-corrector approach that can be constructed from the Adams-Bashforth method and Adams-Moulton method to achieve both simplicity and accuracy. The implementation of the fractional Caputo derivatives using the Euler-Gamma function and the approximation of delay term using the Newton divided difference interpolation are discussed. Some of the numerical examples are presented to show the proposed method is reliable and efficient

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Publication

12V mini magnetic spotlight: Analysis and design concept

( 2021-05-03)

Farizuan R.M.

;

Hazwan M.H.M.

;

Radhwan H.

;

Shamim Ahmad S.A.

;

Mustaqim M.M.

;

Sharifhudin M.A.

;

Khiruzzaki K.F.

;

Nordin N.B.

This paper focused on the 12V mini magnetic spotlight process to design and analysis on the cost of mini spotlight. Nowadays, there are many new technology products launched to the market and speeding up the pace of weeding out the old and bring forth new ones. Every company is constantly researching, innovating and designing new products so that they have the ability to compete with others. The major product which concerned in this project is spotlight. Although there are many different design and function of spotlight had manufactured based on customer need but none of them can satisfy and solve the use problem. In the nutshell, to innovate and overcome the shortcomings faced by the user of the existing product some improvement may be needed. The objectives of this project are to improve and redesign the existing product and to reduce the cost, time and energy consume for the product. The design of 12V mini magnetic spotlight is using morphology chart to fulfill customer needs. At the end of this project, this research will give understanding about the new design concept using CAD software and analysis on the product cost that improved the spotlight.

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Publication

16×16 fast signed multiplier using Booth and Vedic architecture

( 2018-12-06)

Shing L.Z.

;

Hussin R.

;

Kamarudin A.

;

Mohyar S.N.

;

Taking S.

;

Aziz M.H.A.

;

Ahmad N.

This paper present the new 16×16 signed multiplier design using Booth architecture and Vedic architecture. The Booth architecture is based on Radix-4 Booth multiplier which reduces the number of partial product generated into almost half. Vedic architecture has advantages in partial product generation and addition which are done concurrently [1]. In order to improved the performance of signed muliplier, the 16×16 signed multiplicand and multiplier is partition by using the 16×16 Vedic architecture (8 bits per block). Radix-4 Booth multiplier is used to multiply each block as in 16×16 Vedic architecture. This new 16×16 signed multiplier is taking advantages on Booth multiplier approach on top of Vedic achitecture. It has simple architecture compared to normal 16×16 Radix-4 Booth multiplier. This new signed multiplier uses Ripple Carry Adder (RCA) or Carry Look-Ahead Adder (CLA) to add up the generated partial product. This new 16×16 signed multiplier has improved the performance by reducing the total propagation delay. The new 16×16 signed multiplier design 1 (RCA) and design 2 (CLA) are 33.4% and 35.6% faster compared to the 16×16 Radix-4 Booth multiplier. It is because the partial product generation by Radix-4 Booth multiplier and partial product addition are done concurrently using Vedic architecture.

Publication

2.4GHz RF based active RFID localization in industrial environment

( 2019-07-01)

Wye K.F.P.

;

Kanagaraj E.

;

Syed Zakaria S.M.M.

;

Kamarudin L.M.

;

Zakaria A.

;

Ahmad N.B.

This paper documents the implementation of a zone-based localization in an industrial environment based on active RFID system by observing the RSSI values. The active RFID system uses signal strength information to classify which zone the RFID tags are located in. The zoning classification uses Rules-based algorithm to determine the RFID tag allocated zone. The experiment testbed is divided into 4 zones and the number of readers is placed based on the activity coverage for the zone. The active RFID reader characteristics was also studied to determine its range and coverage in the industrial environment. The reader was found to cover 40 m × 70 m read range in the current setup. The Rules-based zone localization is verified with the zone profiling throughout the movement around the testbed.

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Publication

20 Mb/s Experimental Demonstration Using Modulated 460 nm Blue LED for Underwater Wireless Optical Communications (UOWC)

( 2021-06-11)

Seow Y.L.

;

Rashidi C.B.M.

;

Aljunid S.A.

;

Ali N.

;

Endut R.

This paper has demonstrated an experimental low power consumption underwater wireless optical communication (UWOC) system with 460-nm LZ1-00DB00 Blue LED and avalanche photodetector. With the LZ1-00DB00 Blue LED operating at a driving current of 1200 mA with an optical power of 5280 mW, UWOC link offering a data rate up to 20 Mb/s over a transmission range of 5 meters under an underwater channel link. The measured bit-error rate (BER) is 3 10-3 which pass well the forward error correction (FEC) threshold.

Publication

2D Animation: The Development of Animation Depression Awareness for University Students

( 2021-01-01)

Jie O.C.

;

Wan Azani Wan Mustafa

;

Syed Zulkarnain Syed Idrus

;

Mohd Aminudin Jamlos

;

Wahab M.H.A.

;

Alkhayyat A.

Depression is a mental illness that affects how a person thinks, feel, or act negatively. It has also been an issue to Malaysia as it could not only affect an individual, but also their friends, family or even the society. However, the awareness of public towards depression is still low especially when it comes to depression among university students. The lack of awareness could cause the patients to recover slower or having their illness worsen. A more interesting informational and awareness raising material compared with the one in text or audio form is needed to attract more audience understand this issue and raising their awareness towards depression among university students. The development of animation had been carried out successfully with core elements of analyse, design, development, implement and evaluation. The research involved ten respondents from UniMAP and Alpha test that involved a multimedia expert and a psychological expert. As a result, from the questionnaire given to the respondent and Alpha test, the product was able to let almost all the audience to learn about how to overcome depression and increase the awareness of depression among university students. In conclusion, the animation succeeds to achieve the objectives of the research and could be used as an informational and awareness raising material about depression.

Publication

3D mapping of breast surface using digital fringe projection

( 2017-01-01)

Vairavan R.

;

Retnasamy V.

;

Mohamad Shahimin M.

;

Sauli Z.

;

Leng L.

;

Wan Norhaimi W.

;

Marimuthu R.

;

Abdullah O.

;

Kirtsaeng S.

Optical sensing technique has inherited non-contact nature for generating 3D surface mapping where its application ranges from MEMS component characterization, corrosion analysis, and vibration analysis. In particular, the digital fringe projection is utilized for 3D mapping of objects through the illumination of structured light for medical application extending from oral dental measurements, lower back deformation analysis, monitoring of scoliosis and 3D face reconstruction for biometric identification. However, the usage of digital fringe projection for 3D mapping of human breast is very minimal. Thus, this paper addresses the application of digital fringe projection for 3D mapping of breast surface based on total non-contact nature. In this work, phase shift method is utilized to perform the 3D mapping. The phase shifted fringe pattern are displayed through a digital projector onto the breast surface, and the distorted fringe patterns are captured by a CCD camera. A phase map is produced, and phase unwrapping was executed to obtain the 3D surface mapping of the breast. The surface height profile from 3D fringe projection was compared with the surface height measured by a direct method using electronic digital vernier caliper. Preliminary results showed the feasibility of digital fringe projection in providing a 3D mapping of breast and its application could be further extended for breast carcinoma detection.

Publication

3D Reconstruction of embedded object using ground penetrating radar

( 2023-01-01)

Fadil N.D.

;

Hasimah Ali

;

Ahmad Firdaus Ahmad Zaidi

;

Kamal W.H.B.W.

;

Basri N.A.M.

Ground Penetrating Radar (GPR) is a non-destructive device widely used to locate and map underground utilities such as pipes, cables, etc. Its principle is based on the reflection signal of a transmitter-receiver antenna that strikes underground objects by means of the propagation of a short pulse of electromagnetic waves into the ground. The GPR will produce a hyperbolic curve as a result of the object's presence. Accurate interpretation of hyperbola curves is greatly important and highly depends on user expertise; thus, it is considered a challenge. To address this issue, this study aims to develop 3D reconstructions of embedded objects. In this study, C-scan images were acquired, and 3D interpolation and the Synthetic Aperture Focusing Technique (SAFT) were introduced. In this framework, the acquired data is subjected to pre-processing techniques via time-zero correction, background removal using average background subtraction, and Kirchoff's migration method. The software Reflex 3D Scan has been used to analyse and preprocess the 3D reconstruction of embedded objects. The obtained results show that 3D interpolation and SAFT methods are not only able to reconstruct 3D models but are also able to reveal information on the dimension and location of the buried object represented by voxel points in the 3D space cube.

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Publication

4 × 1 Array Antenna with Staging Transmission Line for Vehicle 5G Application

( 2021-06-15)

Ibrahim M.S.

;

Mohd Aminudin Jamlos

;

Wan Azani Wan Mustafa

;

Syed Zulkarnain Syed Idrus

This project implemented the role of 5G technologies for vehicle application. 5G connectivity will give added value to a vehicle, to be able to connect to the networks and also talk to each other without any interference in very low latency. Implementing such kind of this technology will leverage disruptive new applications that will allow to improve driving efficiency and enhance road safety. With the increasing demand for mobile traffic and the delay and security of VANET based on IEEE 802.11p, the key technology of the fifth-generation mobile communication (5G) is combined with the functional characteristics of vehicle networking. And analyzes the application of D2D technology, cognitive radio to improve vehicle communication delay, flexibility, spectrum utilization efficiency and 5G technology in automatic driving. Finally, the potential application of 5G vehicular network is pointed out. This project used microstrip antenna because it has several advantages that did not feature on conventional microwave antenna such as light weight, low volume and thin profile configurations, which can be made conformal. The fabrication process might not cost the budget and mass production is also possible in a period. This research work is focusing on design, simulate, fabricate and analyze a 5G wireless antenna that operates at 26 GHz to 28 GHz by using Rogers RT/Duroid 5880, where this range of frequencies is one of the standard frequencies of the 5G communication. The development of wireless device prototype is also focused in this project as it will be install on a vehicle to enable 5G. This project consist of three major parts which are calculation, simulation and hardware design. Computer Simulation Technology (CST) microwave studio software used to simulate the designed antenna, it prompt the optimization of the antenna designed to achieved desired result before proceed with fabrication. The comparison between theoretical result and practical result was made to analyze margin error and trace the probable cause of the error. The measure of the antenna performance (basic antenna parameter) between array antenna and single patch antenna also studied in this project to conclude the most compatible antenna for vehicle application. 40 GHz Vector Network Analyzer (VNA) had been used to measure the fabricated antenna.

Publication

5.8 GHz Circular Polarized Microstrip Feeding Antenna for Point to Point Communication

( 2020-06-17)

Ariffah S.N.

;

Wan Azani Wan Mustafa

;

Syed Zulkarnain Syed Idrus

;

Muhammad A.

In this paper, the circular polarized 5.8 GHz patch antenna has successfully designed and simulated. This paper presented a design where both of the opposite edges of the rectangular patch of the antenna are truncated using micro strip feeding technique. Both simulations of the proposed antennas had been analyzed. The objectives of this paper has been achieved which is to design and simulate the circular polarized antenna with operating frequency of 5.8 GHz. From the results, the proposed antennas with different feeding technique that radiate at a constant frequency showed some distinct value towards the size of the antenna and the characteristic of its radiation. The results indicate that the antenna that uses micro strip feed line technique yields 2.337 dB directive gain, return loss and axial ratio at -14.042 dB and 3.193 dB respectivel. Meanwhile, the directivity values for the antennas is 5.31 dBi. It can be conclude that the designed 5.8 GHz antenna is ideal for point to pint communication antenna due to its performances.

Publication

5.8 GHz Circular Polarized Microstrip Feeding Antenna for Solar Panel Application

( 2020-12-18)

Mohd Aminudin Jamlos

;

Khairi M.

;

Ariffah S.N.

;

Wan Azani Wan Mustafa

;

Syed Zulkarnain Syed Idrus

;

Muhammad A.

Circular polarized microstrip antenna have been proposed to establish connection among distributed solar farms. The base station antenna of each solar farm permits more precise on the targeting the radio signal and usually is placed at the open area or at a height place so that the radio waves to be transmitted will not be interrupted. For this paper, circularly polarized microstrip patch antenna (CPMSA) is designs and being reviewed. The patch antenna is based on low-cost, but lossy, and the substrate is made of Rogers RT 5880 (lossy). It consists of a rectangular radiator patch, which is fed by microstrip transmission line. In order to realized circularly polarized antenna, the patch has undergone some design modification to achieve circular rotation. Some technique is proposed to achieve CP antenna. The results indicate that the antenna that uses micro strip feed line technique yields 8.55 dB directive gain, return loss and axial ratio at -24.4 dB and 2.05 dB respectivel. The resonance frequency of 5.8 GHz is being selected since it is suitable used for point to point communication among distributed solar farms that located far from each others.

Publication

5G Millimeter Wave Wearable Antenna: State-Of-the-Art and Current Challenges

( 2021-01-01)

Hasliza A Rahim @ Samsuddin

;

Mashagba H.A.

;

Yahaya N.Z.

;

Mohd Najib Mohd Yasin

;

Jamaluddin M.H.

;

Muzammil Jusoh

;

Thennarasan Sabapathy

;

Ismahayati Adam

;

Abdulmalek M.

Fifth Generation (5G) is the next evolution of mobile communication that will provide seamless and massive high speed connectivity to the society. Paralleled with the rise of 5G, it is foreseen that wearable devices particularly wearable antenna will be the significant end node for wearable devices in Millimeter Wave (mmWave) frequency bands. Thus, this paper discusses the new development of the 5G sub-6 GHz and mmWave wearable antenna, introduces the research results of the 5G mmWave wearable antenna in recent years, and addresses the key challenges in the development trend of the development trend of the 5G mmWave wearable antenna.

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Publication

60 GHz Milimeter-Wave Antennas for Point-to-Point 5G Communication System

( 2017-12-11)

Aishah A.

;

Beson M.

;

Azemi S.

;

Junid S.

In this paper microstrip patch antenna for millimeter-wave is proposed. Evolution of shape microstrip antenna are designed which is from rectangular antenna to triangle antenna and changed to triangle with slot. The proposed antenna configuration achieved for covering 5G wireless system. The lowest return loss of the antenna is -29.23dB which is triangle with slot and the maximum gain obtained is 8 db at the 61.93 GHz for the triangle antenna. This antenna are suitable for the 5G wireless application for short range and high rate communication system.

Publication

9-level Symmetrical Cascaded Switched-Diode with Artificial Bee Colony Optimizer

( 2021-01-01)

Muhammad Zaid Aihsan

;

Muhammad Izuan Fahmi Romli

;

Mohd Saifizi Saidon

;

Wan Azani Wan Mustafa

;

Liew H.F.

;

Alkhayyat A.

;

Majeed S.A.

Multilevel inverters (MLIs) are power electronic circuits that is used to replace traditional two-level inverters. MLIs allow for more flexible control of the dv/dt and di/dt ratios, as well as a greater number of output levels in voltage and current in staircase waveforms. The design of a traditional multilevel inverter, on the other hand, necessitates additional power switches and has limitations in a broad variety of applications. In this paper, the new approach known as Symmetrical Cascaded Switched-Diode (SCSD) is used to form a nine-level output voltage with fewer switches and its aim to remove low-order harmonics like the 3rd, 5th, and 7th. The switching angles were determined using the Artificial Bee Colony (ABC) Optimizer method and non-linear equations obtained from the Fourier series of the output voltage and current waveform. The suggested circuit was tested with two modulation indices, modelled using PSIM software, and assessed by experimentation. THD for modulation index 0.62 is around 7.09 percent for simulation and 7.7 percent for experimental results, while modulation index 0.84 produces 4.08 percent for simulation and 4.5 percent for experimental results.

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Publication

A 0.89 to 2.1 GHz Tunable Power Amplifier for Multi-band Transmitter

( 2023-01-01)

Sapawi R.

;

Kipli K.

;

Julai N.

;

Hong Ping K.

;

Sohiful Anuar Zainol Murad

;

Awg Salleh D.N.S.

This paper presents a multi-band power amplifier by using Benzocyclobutene inductor and tunable barium strontium titanate capacitor to achieve high quality (Q) factor to improve narrow bandwidth in tunable of power amplifier. The proposed power amplifier employed two stages with resistive shunt feedback at the input stage to provide a broadband gain and steady wideband input matching. Tunable frequency range from 0.89 GHz to 2.1 GHz is conducted by tunable BST capacitor from 1 pF to 20 pF. The tunable power amplifier achieves high power gain, good input and output matching, low power consumption and good power added efficiency over all frequency range of interest. It can be concluded that the proposed multi-band power amplifier is quite promising for future mobile terminals application.

Publication

A 3.5 GHz hybrid CMOS class E power amplifier with reverse body bias design for 5G applications

( 2021-05-03)

Ahmad Fariz Hasan

;

Sohiful Anuar Zainol Murad

;

Faizah Abu Bakar

A 3.5 GHz CMOS power amplifier (PA) using 0.18 μm Silterra process technology for 5G applications is reported. The proposed circuit consists of two stages. In the first stage, a cascade topology is adopted with a reverse body bias technique to obtain high voltage gain and minimize the current to reduce the power consumption. Meanwhile, a class-E is use in the second stage to obtain high efficiency. The simulation results of propose PA indicate that 22.6 dB of peak power gain (S21), 8.2 dBm of saturated power (Psat) and 54.6% of power added efficiency (PAE) is achieve at 3.5 GHz. These results prove that the proposed PA is suitable for low band 5G applications.

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Publication

A bidirectional flyback converter with cross-coupled non-dissipative snubber circuits

( 2017-12-14)

Mukhtar N.

;

Dah-Chuan Lu D.

This paper proposed a novel isolated bidirectional flyback converter integrated with two non-dissipative LC snubbers. In the proposed topology, the main flyback transformer and the LC snubbers are crossed-coupled to reduce current circulation and recycle the leakage energy. The proposed isolated bidirectional flyback converter can step-up the voltage of the battery (Vbat = 12V) to a high voltage side (VHV = 200V) for the load demand and vice versa. The main goal of this paper is to demonstrate the performances of this topology to achieve high voltage gain with less switching losses and reduce components stresses. The circuit analysis conferred in detail for Continuous Conduction Mode (CCM). Lastly, a laboratory prototype constructed to compare with simulation result.

Publication

A brief overview of detectors used for terahertz imaging systems

( 2020-01-08)

Shahrir Rizal Kasjoo

;

Mohd Mokhar, Mohd Bazli

;

Nor Farhani Zakaria

;

Nurjuliana Juhari

This paper presents a short review on terahertz imaging systems based on several types of technology used in the terahertz detection schemes. Some commercial products from ThruVision Systems Limited Company have utilized GaAs Schottky diode detector at 0.25 THz to produce passive terahertz images for public and homeland security. On the other hand, TeraSense Group Incorporated Company has developed and invented a ground-breaking technology which employs sensor consisting of a matrix of plasmonic semiconductor detectors in their latest products to generate terahertz images in the 0.1 - 1.0 THz frequency range. Recently, the utilization of two-terminal unipolar nanodiodes, known as the self-switching diodes (SSDs), as terahertz detectors has shown promising results. The planar structure of SSD not only enables the device to operate at high frequencies due to low intrinsic parasitic capacitance, but also allows the realization of the device using only a single lithography step. This makes the fabrication process of SSDs faster, more simple, and at lower cost when compared to other electronic devices such as Schottky diodes. The development and recent achievement of SSDs as terahertz detectors are also presented in this paper.

Publication

A Brief Review on Atmospheric Air Plasma

( 2021-11-25)

Zabidi N.Z.A.

;

Zaaba S.K.

;

Sut K.D.E.

;

Mohamad C.W.S.R.

;

Masiman R.I.

Atmospheric pressure air plasma is an attractive technology because it is easyto set up and handle, cheap, and safe. In this paper, a brief review on air plasma configuration and the results of air plasma is presented. One of the important propertiesof any plasma treatment is the generation of reactive atom species such as oxygen(O), nitrogen(N) also known as RONS, and other ions molecules particles. Air plasma has been found to have the same effect when treating surfaces. Surface modification, hydrophilicity, and decontamination effect were observed when materials are exposed to air plasma. The advancement of air plasma technology will improve the surface processing technology by reducing its operating cost.

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Publication

A cascade hyperbolic recognition of buried objects using hybrid feature extraction in ground penetrating radar images

( 2021-08-27)

Hasimah Ali

;

Ahmad Firdaus Ahmad Zaidi

;

Wan Khairunizam Wan Ahmad

;

Mohd Shuhanaz Zanar Azalan

;

Tengku Amran T.S.

;

Ahmad M.R.

;

Mohamed Elshaikh Elobaid Said Ahmed

Ground penetrating radar (GPR) has been acknowledged as effective nondestructive technique for imaging the subsurface. But the process of recognizing hyperbolic pattern of buried objects is subjective and mainly relies upon operator's knowledge and experience. This project proposed a hyperbolic recognition of buried objects using hybrid feature extraction in GPR subsurface mapping. In this framework, a cascade hyperbolic recognition by means of Empirical Mode Decomposition (EMD) and Discrete Wavelet Transform (DWT) are used as hybrid feature recognizing hyperbolic of buried objects. The rationale for an initial focus on cascade hyperbolic recognition is motivated by unique features exhibits by EMD and DWT behaviour in characterizing the hyperbolic pattern which make them particularly well suited to utilities detection in GPR. A series of experiments has been conducted on hyperbolic pattern based on hybrid features using four different geometrical shapes of cubic, cylindrical disc and spherical. Based on the results obtained, the hybrid features of IMF1+ wavelet transform (cH1) shows promising recognition rate in recognizing the hyperbolic that having different geometrical shapes of buried objects.

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