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MASTER (ONGOING)


RESEARCH TITLE: WIRELESS SENSOR NODE FOR MONITORING SYSTEM

RESEARCHER: AMERUL ZABERI (Master)

Abstract:

Raspberry Pi is a mini computer that has a wide variety of purposes to be designed. In this project, it acts as a microcontroller that control sensors such as, Pi camera module and the MFRC522 RFID for surveillance and tracking purposes. The platform used is Raspberry Pi 3, driven by a 1.2 GHz 64-bit quad-core ARM Cortex-A8 CPU and 1 GB RAM. The Pi camera installed, features a 5 MP, with fixed focus lens, has the capabilities of capturing 2592 × 1944 pixels static image, and supports 1080p, 720p, and 640 × 480p video. This system operates in a wireless environment using wireless sensor node where an area is monitored by a personal computer or smartphones. To combine multiple sensors, an algorithm is developed where both platforms are viewed on a web interface. Mikrotik is used as an access point where it can record different types of results, and UDOO as an extender to widen the coverage area. The performance of the wireless connectivity strength and speed are investigated by applying different types of antennas where it gives major effects on the data transmission rates



RESEARCH TITLE : UHF ANTENNA FOR DVB SYSTEM

Researcher : Nur Syahirah Mohd Yaziz (Master)

Abstract:

This research focus on the design and development of UHF antenna for Digital TV broadcasting system. The concept of fractal structure is introduced to reduce bthe size of the antenna. First and second iteration of fractal koch is investigated to and designed. The gain of the antenna is improved by incorporating the active device and the performance between passive and active are investigated. The antenna has been designed using the concept of  log perioidic antenna which produce a wider bandwidth  The proposed design will be simulated to achieve a design that meets targeted specification. This research expects to demonstrate the feasibility of this new technique by applying it to fully integrated antenna-amplifier front-end solutions. It also expects that this antenna will be able to provide high gain, good reflection coefficient, good radiation pattern and beam forming. With this system, the performance of the application applied can be observed using the proposed active antenna. This research will focus on active antenna for the DVB TV application.



RESEARCH TITLE : MULTIBAND TEXTILE ANTENNA FOR WEARABLE APPLICATION

Researcher : NURUL JANNAH RAMLY (Master)

Abstract:
Development in wearable electronics and antennas is driven by the demand for lighter and smaller personal electronics devices. Integrating antenna into normal garments would allow lower profile and more portable electronics to be practical without affecting their performance.  Embroidery antennas posses several advantages for wearable application due to ability of attached to the clothes. The feasibility of investigating Ultra High Frequency (UHF) are made from fully conductive threads that were used for the embroidered as well as the conducting parts of the designed antenna. Simulated and measured results show the proposed and antenna design meets the requirements of wide working bandwidth with compact size, washable and flexible materials. These embroidered antennas will require extra adhesive glue for connector and directly sewing to the garment, which is conducive to being washed and extend consumer lifecycle. Computerized embroidery has been adopted to fabricate the textile antennas in this project. This technology provides high speed, mass-manufacturing capability, accurate and easily modified embroidered antenna designs. The antenna can be automatically integrated into the manufacturing process which further reduces the costs and adds to the aesthetic appeal. The computerized embroidery machinery was discovered by using AutoPunch software. Results in terms of return loss, bandwidth, radiation pattern, current distribution as well as gain and efficiency are presented to validate the usefulness of embroidered antenna.



RESEARCH TITLE : METAMATERIAL INSPIRED MULTIBAND ANTENNA AT UHF BAND

Researcher : Nor Afifah Borhan (Master)

Abstract:
Metamaterials are basically artificial material. It has greater advantage over conventional microstrip technology and more compact. Its individual elements, called unit cell mimic the microscopic in conventional material. The unit cells are repeated and form a structure for the required applications. Metamaterial elements can be fabricated on rigid substrate using resonators such as split-ring resonator (SRR) and its complementary counterpart (CSRR). A multiband metamaterial antenna can be realized by having different frequencies at different modes. By integrating the active elements, the bands can be merging or split. However, the integration does need a proper consideration on the tiny structure of each unit cells. The unit cells for multiband and the configurations for reconfiguration will be studied in this work. Compact and small antennas are important for the digital TV’s application. Metamaterial with the negative permittivity or permeability seems useful for the development of small antenna at Ultra High Frequency (UHF) band.



RESEARCH TITLE : RF ENERGY HARVESTING USING METAMATERIAL STRUCTURES

Researcher : Mohd Syazwan Zainuddin (Master)

Abstract:
The increasing of research wireless communication systems now days continuously neither challenges antenna engineers to create a novel antenna structure nor improves the performance of existing antenna designs. There are many researcher make a further study more on multifunctional antenna. Thus, this research pulls an interest to study the application of energy harvesting on the absorber structure itself. A Split Ring Resonators (SRR) structure of metamaterial for electromagnetic energy harvesting is presented. The resonance phenomenon inside the SRR structure indicates the capability to capture the electromagnetic energy from the electromagnetic wave. The energy absorbed and disappear inside the structure itself attract an interest to make an energy harvesting by focus on the energy concentration at the gap of the SRR structure. Previous research shows the pattern of the radiation energy inside the structure and the direct measurement on between the gaps by using the high end oscillator measurement. This research focus on the challenging of collecting all the electromagnetic energy that trapped inside the structure and harvest the energy by electromagnetic energy to an AC/DC energy. The application of the research are useful for the current generation since by using the electromagnetic wave that appear almost all area now-days, the electromagnetic wave can be used as one of the electrical energy for all electrical device.



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