AZAHARI SALLEH

AZAHARI SALLEH
Technical University of Malaysia Malacca | utem · Faculty of Electronics and Computer Engineering

Master of Electrical Engineering (Electronic &Telecommunication) UTM

About

63
Publications
92,483
Reads
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332
Citations
Citations since 2017
8 Research Items
246 Citations
201720182019202020212022202301020304050
201720182019202020212022202301020304050
201720182019202020212022202301020304050
201720182019202020212022202301020304050
Additional affiliations
August 2005 - present
Technical University of Malaysia Malacca
Position
  • Professor (Associate)

Publications

Publications (63)
Article
Full-text available
The overflow of water is one of the issues that most families face. This research presents a new approach for monitoring and managing water flow. Though water is a crucial component of life, it has been observed that when it comes to water management, people have a tendency to turn on the motor when their taps run dry and turn off the motor when th...
Article
Full-text available
This paper proposes a Microwave Head Imaging Platform (MHIP) based on MIT App Inventor application. One of crucial element in the Microwave Imaging (MWI) is the imaging platform which used to hold and control the movement of antenna in certain angle. In the MHI platform, the key challenge is to improve the efficiency of angle control for brain stro...
Article
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This paper proposes a Microwave Imaging System (MIS) for brain stroke detection. In the MIS, the primary challenge is to improve in terms of cost, size, and stroke image quality. Thus, the main contribution of this work is the economy and the compact rotation platform integrated with an array of nine antipodal Vivaldi antenna in circular arrangemen...
Article
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In recent years, Microwave Imaging (MWI) has offered an effective solution in medical applications, especially in detecting abnormal body tissues in the human brain. Among the popular detection methods currently being used in hospitals are Magnetic Resonance Imaging (MRI) and Computed Tomography (CT) scans. But the constraints faced by this method...
Article
An ultra-wideband (UWB) filtering-antenna with controllable band notch is reported in this paper. The filtering-antenna consists of a modified monopole antenna and defected microstrip structure (DMS). The monopole antenna is modified using microstrip transition in the feedline and block with a triangular-shape slot on each side of the circular patc...
Article
Full-text available
Today's wireless communication systems should be capable to fulfill various insatiable demands for higher data rate and resolutions requirement. In order to satisfy those requirements in UWB system, a lot of antennas that can provide wide bandwidth have been proposed. In this paper, a coplanar stripline (CPS)-fed antenna for ultra-wideband (UWB) ap...
Article
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Wireless Electricity transmission or wireless power transmission is a process that takes place in any system, where electrical energy is transmitted from a power source to an electrical load without interconnecting wires. The traditional ways using electric power cables and electric batteries are often not satisfactory for mobile devices as the use...
Article
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In this paper a two layers microstrip antenna design at 2.45 GHz ISM band with Harmonic rejection filter embedded on the ground plane is presented. The two roger substrates with relative permittivity of 2.2 are separated by an air gap which enhances the antenna gain. The design is simulated using Computer Simulation Technology (CST) Studio Suite 20...
Article
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In this paper, a new design composed of an UWB monopole antenna integrated with bandstop filter (BSF) has been proposed. The bandstop filter is constructed by using a defected microstrip structure (DMS). The proposed design covers frequency bandwidth from 3 GHz to 14 GHz (129.5%), with single band rejection from 5.1 GHz to 5.8 GHz (12.8%). The new...
Conference Paper
The work presents a design of single stage integrated low noise amplifier using negative feedback and inductive source degeneration with DMS technique as the notch filter. Implementation of Super-low noise InGaAs HEMT MGF4937AM transistor which covers from 3.1–10.6 GHz for LNA. Due to interference from IEEE 802.11 WLAN at 5–6 GHz in UWB standard, a...
Article
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This paper represents the impedance modelling of metamaterial structure based on Double Quad-Square Split ring Resonator (DQS-SRR). The impedance was modelled for DQS-SRR design structures. This structure simulation works had been done in CST Microwave Studio simulation software while the impedance was modelled by using polynomial type in Matlab fo...
Article
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In recent years, different filtering antenna topologies have been studied and proposed to meet various objectives of innovative technologies used in modern radar and wireless communication applications. Filtering antenna design is a combination of microwave filter and antenna to achieve radiating and filtering functions within one design. This comb...
Article
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This paper represents the impedance modelling of metamaterial structure based on Double Quad-Square Slot Split ring Resonator (DQSS-SRR). The impedance was modelled for DQSS-SRR design structures. This structure simulation works had been done in CST Microwave Studio simulation software while the impedance was modelled by using polynomial type in Ma...
Article
In this paper, a linear and circular polarized antenna with operating frequency at 2.4 GHz for Wireless Local Area Network (WLAN) application is proposed. Firstly, a basic linear polarization antenna (Design A) was designed with rectangular slot at the rectangular patch and air gap between substrate and copper layer with distance of 10 mm. Next, in...
Article
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In modern telemedicine systems the physiological data of patients can be measured with the aid of electronic sensors located on and inside the human body. The collected medical data is then transmitted wirelessly to an external unit for processing, thereby enhancing the health monitoring, diagnosis, and therapy of the patients. In biomedical applic...
Article
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In this paper, we study behavior of Ultra wideband antenna which is Rectangular Slotted Microstrip Patch Antenna. Then, the antenna operated in proximity of human arm model. Furthermore, the antenna is designed on a FR-4 substrate with dielectric constant of 4.3 and thickness 1.6 mm. This antenna simulated in CST Microwave Studio software. In order...
Article
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A prototypes to prove and demonstrate the concept of Wireless Energy Transfer (WET) is proposed in this paper. The prototype is a simple structure consist of a transmitter as an electromagnetic resonator and a receiver to which the device to be powered is attached. It also implements with an ON/OFF control system using the Infrared (IR) module and...
Article
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This paper presents a design of Ultra Wideband Low Noise Amplifier (LNA) with Negative Feedback and multisection matching network implementing on Microstrip design technique. The design started with selecting a transistor which is Super-low noise InGaAs HEMT MGF4937AM transistor that support ultra-wideband frequencies. In order to achieve ultra-wid...
Article
Full-text available
The uses of detection location technology such as GPS and A-GPS have increased by day. However, this technology cause inefficient for indoor environment detection. This is due to the multipath fading and disability of signal to penetrate most of building materials. This study will focus on indoor location estimation which utilizes available signal...
Article
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Recent advances in sensor technology would lead to a new trend of instrumentation system that can be used in the construction industry. In this paper, a level balancer has been developed which is an instrument that can be used in the construction sector for measuring and determining the equality between two pillars height (elevation) and horizontal...
Article
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The use of electromagnetic radiations (EM) has been increased manifold in recent times mainly due to technological advances. Electromagnetic energy was absorbed by some proportion in the human body which results to an undesirable side-effect. There is a concern on the effect of the electromagnetic radiation on biological systems in general and part...
Article
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Relative permittivity (ɛr) is an important factor that defining the physical and chemical properties related to storage and loss energy in respect of different kind of materials. The purpose of this paper is to study the absorption effect by using different relative permittivity of absorbing material for pyramidal microwave absorber. The pyramidal...
Article
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This study is a review on controlling an electronic device (Arduino) apply for temperature and soil moisture process using Android based Smart phone application in order to address the issues of flexibility and functionality. Beside, this study in future will also develop a low cost and flexible for agriculture control due to not to incorporate wit...
Article
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Radio Frequency Identification (RFID) is reliable asset management systems that allow humans to be more efficient for example in organizing equipment. Recently, the barcode system is being used in agriculture application, especially in monitoring asset managing system. The recent system is costly and inefficient in term of time compared to RFID sys...
Conference Paper
Full-text available
A dual-band antenna by use 2 x 2 patch array with L-slot is presented for simultaneously worldwide interoperability for Microwave Access (WiMAX) and wireless local area network (WLAN) application. This 2 x 2 Patch Array with L Slot Antenna is targeted to achieve the gain more than 2 dB for both frequencies by using array technique design. The anten...
Article
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This paper has presents a novel design of compact monopole antenna fed by a coplanar waveguide (CPW) for dual-band applications that targeted to achieve the gain more than 1 dB. The proposed compact monopole antenna has been design only 20 × 35 mm in size. The monopole structure with two inverted U-shaped, L-shaped lateral and coplanar-way (CPW) fe...
Article
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Image enhancement was difficulty and it most important in image research. These articles are introduction to Image Enhancement which includes the enhancement by point processing. It also described the comparison between smoothing filters and sharpening filters in spatial filtering. Image enhancement also forecast the enhancement in frequency domain...
Article
Full-text available
Starting from 1 April 2015, the Goods and Service Tax will be introduced by the Malaysia Government to be implemented in the country. Since there is no such application provided in the market that can help the struggling citizen to recognize the GST goods, hence; this study will compare the existing Goods and Service Tax system and expose the user...
Article
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Integrated Power Amplifier (PA) and filter which is part of important component for Radio Frequency (RF) transmitter is designed using Adavance Design Simulation (ADS). The main aims of the design is to provide linear amplifier and filter at the center frequency of 2 GHz and biased at the conditions of class AB. GaAs transistor is used as an active...
Article
This paper presents an integrated Power Amplifier (PA) with Bandpass Filter (BPF) for wireless communication. The main aims of the design are to provide linear amplifier and filter at the peak frequency of 2–2.4 GHz using the Advance Design System (ADS). The biased point of the amplifier was selected at the conditions of class AB. By using this met...
Article
Nowadays, a number of low noise amplifiers have been developed to cover a multifunction capability such as Ultra wideband system, noise rejection and image rejection WLAN standard, GSM and others. Low noise amplifier is the one of important part in receiver. However, the integration of notch filter will introduce the multifunction which amplify and...
Article
Green technology wedge microwave absorber is design is done by using the rice husk as the main material. This material effect to reduce the size and effect the environment friendly. Besides that, the shape of microwave absorber is the important parameter that affects the performance of RF absorbers. In this work, different dimension of wedges are d...
Article
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Research on online order purchase system application has been quite improved in the past years. The difficulties faced by this application are some of the applications do not have different types of payments and it had less function button in the application. Rather than that, some of the applications not have a proper database that linked directly...
Article
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Nowadays, most of the electronic devices used Digital Signal Processing (DSP). This paper discussed the block diagram, radar detection, implementation of a convolution, Doppler processing, scanning, compression and filtering that been used in the applications of DSP in Radar purposes.
Article
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For the future of optical communication systems, Digital signal processing (DSP) is an enabling technology. This system is the most promising widely viewed in the next generation for long-haul transport systems. In past, the digital carrier phase estimation demonstration in coherent receivers has stimulated an extensive attention in coherent optica...
Article
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Digital signal processing is concerned with both a discrete signal representation, and with the theory, design and implementation of numerical procedures for processing discrete representation. Techniques of digital signal processing that does not mean special consideration in the context of speech communication. There are several ways characterist...
Article
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Impulse based Ultra wideband technology has been the motivation of many recent researches with the potential of many applications to be researched. The uniqueness of the physical characteristics of the generated signal combined with the high flexibility of for different data rates at the physical layer design level have been addressed in considerab...
Article
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This paper reviews the Wideband Power Amplifier (PA) that has been developed since 1990. Several journals had been discussed in this paper covers few topics such as Characterization of Power Amplifiers, Power Amplifier Architecture and Linearization Technique. Advantages and disadvantages of the technique used had been highlighted as well as the su...
Conference Paper
A Smart Detector Database using Radio Frequency Identification (SDDR) is a cyclist tracking device. This device can be applied in the biggest race competition. Today, the monitoring system used unable to trace not arrive cyclist. As a solution, SDDR will detect cyclist that through the checkpoints and the profile about that cyclist would be display...
Article
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Recently, many studies propose the use of ultra-wideband technology for passive and active radio frequency identification systems as well as for wireless sensor networks due to its numerous advantages. By harvesting these advantages of IR-UWB technology at the physical-layer design, this paper proposes that a cross layer architecture platform can b...
Article
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This paper describes the design of wideband parallel coupled microstrip bandpass filter (BPF) for S-Band application. S-Band is the range of frequency from 2 GHz to 4 GHz which is a part of microwave system and a partly combination between Ultra High Frequency (UHF) and Super High Frequency (SHF) which including Wireless Local Area Network (WLAN),...
Article
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Nowadays, heart related diseases are on the rise situation. In Malaysia, the proportion of patients is increasing day by day but the number of doctor and nurse slightly different situation. For this reason, the new propose graphical user interface for wireless patient monitoring system is proposed in order to help doctors and nurses to monitor thei...
Article
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The network service system is increasingly extended as the demand from various of usage is growing. Although many products had been invented, there are still the incidents that involve to death of children which been left in cars often occur. The system is designed in order to overcome this unwanted incident from happening. The proposed system is d...
Article
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This paper describes the design of wideband low noise amplifier (LNA) for mobile software defined radio (SDR) application which targeted to be applied in two-way communication mobile system architecture. The technical specification was deduced from the TIA-603 C standard receiver system sensitivity and intermodulation. The proposed LNA exhibit low...
Conference Paper
Microwave filter is a kind of device, which can separate microwave signals with different frequencies. The filter has been utilized widely in many fields such as communication, signal processing, radar and other related fields. An X-band filter using parallel coupled-line technique with DGS is designed. The purpose of this paper is to observe the p...
Article
Full-text available
In this paper, a performance analysis of an array of 2 x 1 Ice Cream Cone UWB Antenna for Ultra Wide Band (UWB) communication is being proposed. The antenna designs have been simulated using CST Microwave Studio. The antenna covers the UWB spectrum from 3.1 to 10.6 GHz, and had a return loss below than - 10 dB throughout the entire band. The basic...
Article
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Greenhouses are often used for growing flowers, vegetables, fruits, and tobacco plants. Most greenhouse systems still use the manual system in monitoring the temperature and humidity in the greenhouse, a lot of problems can occur not for worker but also affected production rate because the temperature and humidity of the greenhouse must be constant...
Article
Full-text available
The development of heart pulse instruments rapidly fast in market since 21st century. However, the heart pulse detector is expensive due to the complicated system and it is used widely only in hospitals and clinics. The project is targeting to develop a significant photosensor to the medical fields that is easy to use and monitor their health by th...
Conference Paper
Full-text available
A dual microstrip meander slot antenna is presented for Wireless Local Area Network (WLAN) application. The proposed antenna comprises a rectangular microstrip patch element embedded with two meander slots. The parametric study is performed to investigate the characteristics of microstrip patch antenna with double meandered slots compared to one wi...
Article
Full-text available
This paper presents the design and simulation of low noise amplifier (LNA) used in an active radio access point (RAP) for Radio over Fiber (RoF) technology at 5.2 GHz. RoF is integration of optical fiber for radio signal transmission within network infrastructures that is considered to be cost effective, practical and relative system configuration...
Article
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This paper describes the development of an aquaponic system using solar panel to control the water pump and air pump based on Peripheral Interface Controller (PIC) technology. Solar power is ideally can be used in Malaysia due to location factor and also give the benefit to the environment as renewable energy. It involves a combination of electrica...
Article
In the past few years, several designs of dual- and triple-band microwave filters satisfying various objectives have been proposed for wireless communication. Several designs are new concepts, whereas others are inspired from previous works. The development trends of these designs can be reviewed from this compilation of studies. This paper begins...
Article
Full-text available
A dual microstrip meander slot antenna is presented for Wireless Local Area Network (WLAN) application. The proposed antenna comprises a rectangular microstrip patch element embedded with two meander slots. The parametric study is performed to investigate the characteristic of microstrip patch antenna with double meandered slots compared to the sam...
Conference Paper
This paper discussed the study on the circular polarized patch antenna by using double circle slot technique in single patch and X-polarized patch antenna. The operating frequency for the proposed antenna is 2.4GHz with 29.86MHz of bandwidth and return loss is -34.85dB. The antenna had been designed and simulated using CST Microwave Studio simulati...
Conference Paper
Full-text available
In this paper, we design magnetic levitation system that deals with the knowledge of electromagnetism and the control switching application. The concept of this design is to achieve the state of equilibrium where the magnetic attraction counterbalances the force of gravity pulling on an object. The control system in this design is formed by a PIC M...
Conference Paper
This paper present an x-linear polarized microstrip patch antenna and x-circular polarized microstrip patch antenna using single port in X-form at 45°, 135°, 225° and 315°. Combinations of 4 patches using quarter wave impedance matching technique have been used to design x-linear polarized microstrip patch antenna and x-circular polarized microstri...