Seminar Series


Date: 13th May 2014 (Wed)

Time: 2.30 pm - 3.30 pm
Venue: Mechanical Meeting Room, Level 2, FK
Speaker :Dr Dayang Azra Binti Awang Mat

Title: Development of Slow Wave Structures for Millimeter-wave CMOS Applications


Recently, researches in unlicensed frequency of 60 GHz band becoming great importance due to high data rate demand. Larger bandwidth, higher transmit power, shorter wavelength and higher directivity are the main important in millimeter-wave design technology. Although well-known Gallium Arsenide (GaAs) technology offers high performance device but IC designers have move towards Complementary metal–oxide–semiconductor (CMOS) process. CMOS not only offers higher level of integration for IC design, high noise immunity and low static power consumption, it also has very good thermal conductivity than GaAs technology and allows high density of logic function on a chip with lower cost of manufacturing. Transmission lines and filters are the most important front-end device in millimeter-wave transmission system. One of the biggest challenges in CMOS technology process is due to the lossy silicon substrate. Lossy silicon substrate could be solved by using a low dielectric loss substrate but this would increase the cost of manufacturing. Thus, slow wave propagation technique is applied in this research to reduce the loss of the design structure as well as solving the cost problem. Slow wave technique is used to minimize RF energy coupled into the substrate by arranging the strips into patterned structure. The strips and slots in the shield will prevent short-circuit of the magnetic flux by stopping the flow of the induced current along the signal path. In this research, coplanar transmission line (CPW) and bandpass filters (BPFs) are designed with patterned ground shields in the CMOS 0.18μm process. CPW has several advantages over other microwave transmission line in terms of low dispersion, and easy connection to both shunt and series elements. Classical CPW suffered from 1-2dB/mm losses at 10GHz, to solve this, silicon on insulator (SOI) CMOS CPW is used, but it is costly. Thus, slow wave propagation phenomenon is introduced by applying the floating ground shield on the structure to reduce the loss as well as cost of manufacturing. Slow wave concept occurred when the shield breaks the electromagnetic field distribution and limits the current flow along the length of the line resulting increases of capacitance as well as lowering the phase velocity, minimizing both ohmic loss and eddy current and value of inductance per unit length remains intact. The strips space (SS) and strips length (SL) is determined to design the patterned ground structure. Meanwhile, BPFs are designed with metamaterial structure, Split ring resonator (SRR) placed on the second lowest metal of CMOS process. Conventional, quadrilateral and complimentary SRRs are used in this design. All designs are simulated using Agilent ADS Momentum 2008 2D EM simulator, HFSS v13.0 and Cadence Virtuoso. On wafer measurement was carried out by Agilent Vector Network Analyser (VNA: E8361C PNA series) and Cascade Microtech Infinity probes. It shows that, CPW with patterned ground structure produce very good results, with measured return loss greater than 37.71dB, attenuation loss of 0.619dB/mm, phase constant of 2.574 rad/mm and high Q-factor of 18.045 at 55GHz compare to recent researches in microwave transmission line.

Sukan Staf "Indoor Game" Unimas 2015


karom FK1


karom FK

Pasukan Karom, FK telah menjuarai perlawanan antara PTJ pada Sabtu 11 April 2015 bertempat di Stadium UNIMAS.

Johan : Fakulti Kejuruteraan
Naib Johan : Unit Kewangan
Ketiga : PAK

Terima kasih diatas kerjasama semua pihak yang terlibat dalam pertandingan tersebut dan moga-moga kita terus berusaha untuk memenangi perlawanan yang akan datang.

Seminar Series


Date: 29th April 2014 (Wed)

Time: 2.30 pm - 3.30 pm

Venue: Mechanical Meeting Room, Level 2, FK

Speaker :Madam Mahshuri Yusof

Title: Clam shell powder as filler in unsaturated polyester matrix composites


This research investigates the effect of infusing the clam shell powder into the unsaturated polyester matrix. The powder was gained from the local clam shell known as lokan or in its scientific name, Polymesoda bengalensis. The powder from the clam shell was sieved into 8 different sizes and the average mean diameter was measured by Malvern mastersizer 2000. The samples were fabricated through ultrasonication and open molding method at room temperature according to the different filler’s weight fractions (2, 4, 6 and 8 wt.%) and sizes. Tension, compression and flexural tests were done according to ASTM D638, ASTM D695 and ASTM D790, respectively. The results show that the inclusion of aragonite CaCO3 in the UPE matrix greatly improved the tensile modulus, compressive modulus and flexural modulus.

Faculty of Engineering staff receive awards at Majlis Anugerah Gemilang UNIMAS (MAGU2015)


UNIMAS organized the awards ceremony (MAGU2015) on 31st March 2015, at the DeTAR PUTRA arena. Minister of Welfare, Women and Family Development, Datuk Fatimah Abdullah was present to grace the event and to deliberate important awards. Also present to deliberate awards were Datu Dr Hatta bin Solhi, Chairman Board of Directors UNIMAS, Prof. Dato’ Dr Mohamad Kadim bin Suaidi, Vice Chancellor UNIMAS along with Deputy Vice Chancellors, Assistant Vice Chancellor and Registrar. The ceremony was also attended by Deans of Faculties, Directors and other important office bearers of UNIMAS. A large number of UNIMAS staff attended and witnessed the deliberation of awards to their colleagues and friends.

The awards were given in different categories from all Faculties and Divisions of UNIMAS. From Faculty of Engineering, Prof. Dr Omar Abdullah, Department of Chemical Engineering and Energy Sustainability, was given the award for publishing highest impact factor journal paper in 2014. Excellence in service awards were given to Prof. Dr Amir Azam Khan, Hishammudin Afifi Huspi, Department of Mechanical and Manufacturing Engineering, Dr Siti Kudnie Sahari, Head of Department Electrical and Electronics Engineering, Dr Darrien Mah Yau Seng, Dr Norsuzailina Mohamed Sutan and Rohaida Affandi from Department of Civil Engineering, Ibrahim Yakub, Norzilawatil Azwa Mohamad from Department of Chemical Engineering and Energy Sustainability and Haliah Taip from Administration. The Faculty would like to congratulate all recipients and to present its good will to all staff for their future success.

Research Methodology

Research Method

 Research Method2

A one-day short course entitled “Research Methodology” was organised by the Faculty of Engineering at the CAIS auditorium. The course attracted 30 participants from Post Graduate students and Faculty members. Among those present were also participants from the Faculty of Resource Science and Technology, Faculty of Applied and Creative Arts and Faculty of Computer Sciences and Information Technology.

The course began with a welcoming speech by Dr Hushairi Zen, Deputy Dean (Postgraduate and Research) Faculty of Engineering. The short course was divided into morning and afternoon sessions– conducted by Professor Dr Amir Azam Khan and Professor Dr Sinin Hamdan respectively. Both speakers shared their knowledge and experience in the thought process behind conducting research, setting experiments, analysing and statistically presenting the results as well as giving good and viable conclusion to the experimental results. Such activities are planned to be regularly organized in the Faculty and are expected to benefit the participants especially the young lecturers who want to do start research projects and get funding for these projects.

The organisers look forward for more participation, especially from young lecturers for the next short course to be held on April 8th, 2015 as follows:

Course Title: What Do People Want to See in a Research Proposal?

Lecturer: Prof Dr Andrew Ragai Henry Rigit

Course Title: Writing Effective Grant Proposal

Lecturer: Prof Dr Ng Chee Khoon

Further information on the short course would be informed later.

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