WIRELESS AND RADIO SCIENCE CENTRE - …fkee.uthm.edu.my/waras/files/Bulletin 3rd Edition 2015 LATEST...

Highlights

Issue No. 3/2015 http://fkee.uthm.edu.my/waras

Copyright 2015 by WARAS 1

WIRELESS AND RADIO SCIENCE CENTRE “Exploring Global Ideas”

Contents Page Editorial TEAM Message from Head of

Centre

2

Advisors:

Assoc. Prof. Dr. Muhammad Yusof Ismail

Chief Editor:

Dr. Nor Shahida Mohd Shah

Editorial Members:

Hairul Nizam Tukimin

Dr. Noorsaliza Abdullah

Organization of WARAS

Achievements

Activities

Special Article

Research

3

4

5

10

14

Issue No. 3/2015 WARAS Highlights

Copyright 2015 by WARAS

2

Message from the Head of Centre

It is my great pleasure to congratulate the editorial team of the bulletin of Wireless and Radio Science

Centre (WARAS) for successfully publishing the third issue of WARAS Highlights. As an active research

centre at Universiti Tun Hussein Onn Malaysia, WARAS has been actively involved in diversified

research and innovation activities focusing on wireless communications and radio science research

projects. In line with the call of the Ministry of Higher Education of Malaysia on the importance of

conducting multi-disciplinary research, WARAS has taken a proactive approach through the

participation of local and international researchers from relevant disciplines to join us in making

substantial contributions. The involvement of WARAS research fellows at diverse range of national and

international activities provided in this bulletin is one of the key strategies in order to enhance

significant linkages with research institutions and industries for promoting a vibrant research culture.

Thank you.

With Wisdom, We Explore

Associate Professor Dr. Muhammad Yusof Ismail

Head of Wireless and Radio Science Centre (WARAS)

Faculty of Electrical & Electronic Engineering

Universiti Tun Hussein Onn Malaysia



3

ORGANIZATION OF WARAS

Associate Professor Dr. Muhammad Yusof Ismail

Head of WARAS Centre

Muhammad Inam

Abassi

Noor Hafizah

Sulaiman

Muhammad

Hashim Mir Khan

Dahri

Arslan Kiyani

Wan Nor Zaihasra

Wan Saleh

Fauzi Mohd Johar

Wadhah Abdo

Mohammed al-

Ashwal

Norazila Mohd

Saleh

Noor Syazana

Arshad

Siti Hafizah Yusop

Ijaz Khan

Hadi Abdullah

Abdirahman

Mohamud Shire

Hannes

Masandig

Hairul Nizam

Tukimin

(Ass. Engineer)

Abdul Hamid

Sabran

(Ass. Engineer)

Prof. Ir. Dr. Zainal Abidin Ahmad

Prof. Hj. Ayob Johari

Prof. Dr. Maizam Alias

Assoc. Prof. Dr. Jiwa Abdullah

Assoc.Prof. Dr. Kavikumar Jacob

Assoc. Prof. Dr. Mohammad Mahadi

Abd Jamil

Dr. Fauziahanim Che Seman

Dr. Mariyam Jamilah Homam

D. Khairun Nidzam Ramli

Dr. Karthigesu Nagarajoo

Dr. Noorsaliza Abdullah

Dr. Nor Shahida Mohd Shah

Mr. Mohd. Hakimi Zohari

Mr. Shipun Anuar Hamzah

Pn. Sharifah Saon

Pn Nurulhuda Ismail

Pn. Elfarizanis Baharudin

Prof. Ir. Dr. Ahmad

Faizal Ahmad

(UMP)

Prof. Dr. Norbahiah

Misran

(ANGKASA UKM)

Prof. Dr. Muhammad

Amin

(SUPARCO, Pakistan)

Dr. Achmad Munir

(ITB, Indonesia)

Prof. Shabunin Sergey

(Ural Federal

University,Rusia)

Technical

Division Postgraduate Section Research Fellow

Internal External


ACTIVITIES


4

4th PUBLICATION AWARD UTHM 2014

The 4th Publication Award 2014 was held on 4th November 2014 at Banquet Hall Sultan

Ibrahim, UTHM. The award was aimed at recognizing researchers who have successfully

shown an excellent performance on publications from 2012 to 2013. The Head of RF and

Reconfigurable Antenna Design Cluster of WARAS received two awards; Young Publication

Award and Best Book Award (Science Technology Engineering). The awards were presented by

the Vice Chancellor of UTHM, Prof. Dato' Dr. Mohd Noh Dalimin and the Deputy Vice-

Chancellor (Research and Innovation) UTHM, Prof. Dr. Wahid Razzaly. Congratulations.

Excellence Award of Research and Innovation UTHM

WARAS Centre is among the most active Research Centres in UTHM. Based on the research

performance and achievements in research and innovation activities from 2012 to 2013,

Head of Radio Frequency & Antenna Design Cluster under is also Head of WARAS Centre,

Assoc. Prof. Dr. Muhammad Yusof Ismail has been awarded a Special Incentive Vice

Chancellor Award UTHM and University Incentive Award UTHM at Research and Innovation

Excellence Awards in Research and Innovation 2014 which was held on 3rd November 2014.


ACTIVITIES


5

UTHM – Industry Open Day 2014

On August 20, 2014, WARAS Centre was invited as an exhibitor at UTHM – Industry Open Day

2014 which was held at Dewan Tunku Mahkota Ismail (DTMI). Datuk Dr. Mohd Azhar Hj.

Yahaya, Deputy Chief Secretary of Ministry of Science, Technology and Innovation (MOSTI)

accompanied by Vice Chancellor of UTHM, Prof. Dato' Dr. Mohd Noh Dalimin visited WARAS

booth and appreciate the great achievements of WARAS research team.

Invited Scientist at Ural Federal University, Russia

A research fellow from Radio Frequency and Reconfigurable Antenna Design cluster of Wireless

and Radio Science Centre, Associate Professor Dr. Muhammad Yusof Ismail received an

international recognition as Invited Scientist by Institute of Radio Electronics, Ural Federal

University (UrFU) in Ekaterinburg, Russia. The collaboration between WARAS UTHM and UrFU

began in 2013 through series of continuous discussions headed by Professor Dr. Shabunin

Sergey from UrFU and Associate Prof. Dr. Muhammad Yusof Ismail of WARAS UTHM. During the

official program which started on 17th May 2014 in Ekaterinburg, several workshops on

Reconfigurable Antennas had been organized involving researchers from Institute of

Radioelectronics UrFU. In line with the mission of WARAS Centre in exploring global partners,

some collaborative research projects between WARAS UTHM and UrFU Russia have been

identified which could benefit both the institutions. On the last day of the programs, Associate

Professor Dr. Muhammad Yusof was brought to a courtesy visit to meet the Vice Chancellor of

Ural Federal University, Professor Knyasev Sergey.


ACTIVITIES


6

Special Excellent Award of Research and Innovation UTHM

In conjunction with the official visit of Education Minister (II), Y.A.B Dato' Idris Jusoh to

Universiti Tun Hussein Onn Malaysia (UTHM) on 22nd February 2014, the Head of RF &

Reconfigurable Antenna Design Cluster, Assoc. Prof. Dr. Muhammad Yusof Ismail has been

awarded a Special Excellent Award in Research and Innovation based on his achievements in

2013. The award was presented by the Education Minister (II), Y.A.B Dato' Idris Jusoh. The

Education Minister (II) then visited WARAS booth where he was briefly explained on research

projects carried out at WARAS Centre.

Visit by Professor Shabunin Sergey from Ural Federal University Rusia

On 12nd February 2014, for the first time WARAS received a visiting professor from Ural

Federal University, Russia, Professor Shabunin Sergey. In the short visit, Professor Shabunin

Sergey was brought to a courtesy visit to meet the Vice-Chancellor of UTHM, Prof. Dato'. Dr.

Mohd Noh Dalimin. Head of Centre, Assoc. Prof. Dr. Muhammad Yusof Ismail gave a brief

explanation about key research clusters and current research projects of WARAS. Some

collaborative research projects between WARAS and Ural Federal University, Russia were also

discussed during the visit.


ACTIVITIES


7

Seoul International Invention Fair (SIIH 2013), South Korea

WARAS participated at 2013 Seoul International Invention Fair (SIIF 2013) which was held from

29th November to 3rd December 2013 at COEX Hall, Gangnam Gu Korea. In a competition involving

more than 700 participants comprising 32 countries, a product represented by a group of

researchers headed by Assoc. Prof Dr. Muhammad Yusof Ismail entitled "Frequency Selective

Reflector for Radio Communications" funded by Prototype Research Grant Schedule (PRGS) was

awarded a Semi Grand Prize Award which is the second highest award in the innovation

competition.

Memorandum of Understanding signing ceremony between UTHM and

Institute of Space Technology (IST), Islamabad,

August 30, 2013 - A special event of Memorandum of Understanding signing ceremony between

Universiti Tun Hussein Onn Malaysia (UTHM) and Institute of Space Technology (IST), Islamabad,

Pakistan was organized at the Banquet Hall Tunku Tun Aminah Library, UTHM. The program started

with a courtesy visit of IST delegation led by the Vice Chancellor of IST, Brig. Gen. Prof. Engr. Imran

Rahman to the Office of the Vice Chancellor of UTHM. In the keynote address, the Vice Chancellor of

UTHM, Prof. Dato' Dr. Mohd Noh Dalimin welcomed IST delegation to UTHM and believed that

research collaboration between Wireless and Radio Science Centre (WARAS), UTHM and IST,

Islamabad could be further enhanced in the future.


ACTIVITIES


8

Officicial Visit by Prof. Dr. Muhammad Amin, SUPARCO, Pakistan

On 1st July 2013, WARAS received a visit by Prof. Dr. Muhammad Amin from Space and Upper

Research Commission (SUPARCO), Pakistan. A brief meeting with WARAS Research Fellows and

Dean of the Faculty of Electrical and Electronics Engineering, Prof. Ir. Dr. Zainal Abidin Ahmad was

held on the first day of the visit. Some potential projects were discussed with all WARAS Research

Fellows during the meeting. On the second day, Professor. Dr. Muhammad Amin, was brought to a

courtesy visit to meet the Vice-Chancellor of UTHM, Prof. Dato'. Dr. Mohd Noh Dalimin.

WARAS Postgraduate Seminar

In order to enhance the quality of research projects carried out at WARAS Centre a Seminar on

Postgraduate Research was held on 3rd July 2013. During the program, all WARAS postgraduate

students presented their research progress in front of the visiting Professor of SUPARCO, Prof.

Dr. Muhammad Amin and Head of WARAS, Assoc. Prof. Dr Muhammad Yusof Ismail and other

WARAS Research Fellows. Prof. Amin appreciated the research work carried out at WARAS and

gave fruitful suggestions for the improvement and progress of the research projects. Prof. Amin

also shared his experience during his postgraduate studies and a motivational talk for further

improvement and enhancement of WARAS research activities.


ACTIVITIES


9

Distinguished Lecture Series of WARAS

WARAS had organized a distinguished Lecture Series in conjunction with Memorandum of

Understanding (MoU) ceremony between WARAS Centre and Institute of Space Technology,

Islamabad on 1st July 2013. An invited speaker from Space and Upper Atmosphere Research

Commission (SUPARCO), Prof. Dr. Muhammad Amin presented a topic entitled “An Overview of

Satellite Communications on The Move (COTM) Systems and its Development at SUPARCO”.

International Invention Innovation and Technology Exhibition (ITEX 13)

Kuala Lumpur Convention Centre (KLCC), Kuala Lumpur, Malaysia

A team of WARAS researchers from Radio Frequency & Reconfigurable Antenna Design cluster

headed by Assoc. Prof. Dr. Muhammad Yusof Ismail participated at the 24th International,

Invention, Innovation and Technology Exhibition (ITEX'13) which was held from 9th - 11th May

2013 at KLCC, Kuala Lumpur. WARAS team successfully exhibited two research products in the

exhibition and was awarded with 2 gold medals.

1) Frequency Selective Reflector for Radio Communications.

2) Miniaturized Broadband Paper Based Substrate Antenna for Automotive Systems.


ACHIEVEMENTS


10

11

NO NAME OF EVENT AWARDS RECIPIENT 1 Special Excellence Award of

Research and Innovation UTHM Special Excellence Award of Research and Innovation UTHM

Associate Profesor Dr. Muhammad Yusof

Ismail

2 2013 Seoul International Invention Fair (SIIF 2013)

Miniaturized Dual Frequency Planar Antenna for Radio Systems

1. Grand Prize Award 2. Gold Medal


Ismail

3 PECIPTA 2013

Miniaturized Broadband Paper Based Substrate Antenna for Automotive Systems

- Silver Medal


Ismail

4 Research and Innovation Festival 2014 UTHM

Special Excellence Award of Research and Innovation UTHM


Ismail

5 Excellence Award of Research and Innovation UTHM

1. Special Incentive Vice Chancellor Award UTHM


Ismail 2. University Incentive Award

UTHM

6 4th Publication Award UTHM 2014

Young Publication Award


Ismail

Best Book Award


Ismail

UTHM Scopus Indexed Publication (Document)


Ismail

UTHM Scopus Indexed Publication (Citation)


Ismail

UTHM Scopus Indexed Publication (H-Index) Award


Ismail


Assoc. Prof. Dr. Muhammad Mahadi Abdul

Jamil

Dr. Fauziahanim Che Seman


SPECIAL ARTICLE


11

Half Turn Half Wavelength Wide Axial Ratio Beamwidth Quadrifilar Helix Antenna for Satellite Application

Prof. Dr. Muhammad Amin

(Associate Research Fellow of WARAS Centre)

Institute of Space Technology, Islamabad

Professor Muhammad Amin is a visiting professor of Wireless and Radio Science Centre (WARAS) Universiti Tun

Hussein Onn Malaysia (UTHM). On 1st July 2013, he was invited to delivere a distinguished lecture series at WARAS

Centre. The work presented in this article has been done in collaboration with WARAS Centre.

Abstract- In this paper, it has been shown that the

Axial Ratio (AR) beamwidth of conventional

Quadrifilar Helix Antenna (QHA) can be improved by

breaking the four monofilars of QHA at the centre

where current is minimum and adding radial stubs on

both sides which provide the reactive coupling

between the two ends. The AR beamwidth (AR ≤ 3

dB) varies from 118o to 223

o as the length of the radial

stubs is increased from 3 mm to 13 mm in all

monofilars, keeping the front to back ratio (F/B)

greater than or equal to 10 dB. The optimum value of

AR beamwidth (AR ≤ 3 dB) of 223o is achieved when

the radial stub length is 7 mm. The gain, 3-dB gain

beamwidth, bandwidth for VSWR ≤ 2 (with reference

to the resonant input impedance) and F/B are 5.52 dB,

118 o, 40 MHz and 16.7 dB respectively at the resonant

frequency of 2460 MHz. Simultaneously, the

configuration achieved a reduction in size of 24%.

Index Terms- Quadrifilar Helix Antenna (QHA);

Circular Polarization (CP); Axial Ratio (AR); Half

Power Beamwidth (HPBW); Axial Ratio Beamwidth

I. INTRODUCTION

Quadrifilar helix antennas (QHAs) are widely used in

space and land applications because of its many attractive

features such as compactness, light weight, low profile,

sufficient gain, good circularity, wide 3 dB gain

beamwidth and polarization & radiation pattern

reconfigurability [1]–[8].

It is also one of the antennas used for small satellite

platforms / satellite ground receivers for applications such

as personal communication networks via satellite on

handheld receivers [9], future Land Mobile satellite

(LMS) communication systems using satellite MIMO

[10], [11], GPS receivers [5], [12]–[15], in Pico satellite

[16] and small satellite platforms [17] as telemetry,

tracking and command (TT&C) / communication payload

antenna [18]. QHA is also suitable for satellite Digital

Audio Broadcast (DAB) applications like Sirius XM

satellite radio [19]. In Low Earth Orbit (LEO) satellites,

onboard antennas use circular polarization [5] owing to

the continuous change in the direction between satellite

and ground receiving antenna that would in case of linear

polarization require polarization adjustment. . In case of

LEO satellites, angle between the transmitting and

receiving antennas changes significantly over a single

pass window. QHA, with wide gain beamwidth ensures

sufficient received power power without introducing

polarization losses, if the usable gain beamwidth falls

within the AR beamwidth.


SPECIAL ARTICLE


12

However if the later is narrower than the former,

polarization loss would introduce additional decrease in

gain within the usable gain beamwidth. Therefore wide

AR beamwidth antennas are important for onboard use of

LEO/MEO satellites and satellite ground receivers,

especially at low elevation angles where normally AR

deteriorates quickly.

A good axial ratio in one hand of CP (e.g. RHCP) also

provides better isolation from the other (i.e. LHCP). This

may give reliability if polarization is used as one of the

modulation parameters. Many improvements with respect

to bandwidth (dual band operation) [20], [21], size

reduction [2], [21], [22], dual mode [6], [12], [21], [23]

and self phasing [24] were made. However, no significant

work has been reported on improvement in AR

beamwidth of QHA. It has been shown in various works

previously reported that the performance characteristics

of QHA can be improved by modifying the geometrical /

physical parameters of the antenna [2], [6], [21], [25].

In this paper a modification has been made to the

conventional half-turn QHA design to achieve 3 dB AR

beamwidth ranging from 118o to 223 o with good gain and

front to back ratio (F/B).

In normal mode of operation of a half turn, half

wavelength QHA, current distribution on any of the two

bifilars is such that the current null is formed at the centre

of the helical sections. Therefore, helical sections (in

form of stub lengths) have been incorporated in all the

volutes of the QHA where minimum current occurs to

improve the AR as shown in [Fig.1]. This change would

adjust the ratio of vertical to horizontal electric field. By

altering the radial stub length, [Fig.2] a parametric study

of QHA’s various characteristics such as gain, F/B, 3 dB

gain beamwidth, ARBW, AR at 3 dB gain beamwidth

points, frequency and VSWR were carried out and

optimum value of radial stub length that gives improved

AR / AR beamwidth was selected for the final antenna

model.

Fig. 1. Modified QHA schematic

Fig. 2. Current distribution on QHA. (a) Conventional QHA. (b) QHA variant with axial and radial gap. (c) Current distribution comparison of

CQHA and QHA variant.

II. DESIGN AND SIMULATION

In CP, AR depends on the ratio of vertical to horizontal E-

field magnitudes and the phase difference between the

two, which for 0 dB AR should be 1 and 90o respectively.

In bifeed network, therefore, a 3 dB 90o hybrid is used

that provides equal voltage at the two feeds with 90o

phase difference. However due to radiation pattern (RP)

characteristics, the radiated fields of horizontal and

vertical polarization are not of same magnitude in all

directions, which results in deviation of AR from ideal

value of 0 dB. (The phase difference between the two

fields is adequately maintained, which is at the output of

the 3 dB hybrid). In normal mode of operation of a half

turn and half wavelength QHA, current distribution as

shown in [Fig.2] on any of the two bifilars is such that a

current null is formed at the centre of the helical sections

and the current maxima occurs at the centre of the radial

sections of the bifilar loop [2].

The vertical to horizontal field ratio of conventional QHA

with or without gap shows that horizontal field is lesser in

magnitude as one moves away from the boresight. It is

expected that the AR would improve if the decrease in H-

field is compensated by adding horizontal current

elements. For this, a gap is introduced at the current

minima points of the four helical sections which divide

the conventional QHA structure (as shown in [Fig.2]) into

two halves at the middle along the axial direction.

Simulations were carried out using Numerical

Electromagnetic Code (NEC) [26] tool to know the

optimum axial and radial gap before adding stubs with

helical sections at the centre along the circumference of

the helix.


SPECIAL ARTICLE


13

Fig. 3. Effects of radial gap on radiation characteristics of QHA

Fig. 4. Effects of axial gap on radiation characteristics of QHA

Fig. 5. Effects of radial and axial gap on resonant frequency and VSWR

of QHA variants.

Fig. 6. Axial Ratio plots of QHA variants at different stub

lengths

The results are shown in [Fig.3] [Fig.4] [Fig.5]. It is

evident from the parametric study shown in [Fig.4] that

gain, F/B and AR beamwidth have reduced significantly

as the axial gap is increased between the two halves of the

QHA. This happens due to the decrease in mutual

coupling among the two halves of QHA as energy in

horizontal field spreads and the radiation pattern goes

omnidirectional reducing AR beamwidth, gain and F/B as

the 3 dB gain beamwidth increases.

However, radiation characteristics of the QHA have not

changed much with the introduction of radial gap except

few variations in some of the parameters which show the

increase in 3 dB gain beamwidth at the expense of

improved F/B and decreased AR beamwidth as the gap

was increased between the two halves of the QHA as

shown in [Fig.3]. An axial and radial gap of 2.4 mm and

14o were finally selected by considering above

observations. Now circumferential stubs are added at the

current minima points to see whether it improves the ratio

of vertical to horizontal electric fields and hence the AR.

A parametric study is carried out to observe the effects of

stub length on various parameters of the antenna with the

objective to improve the AR while keeping other

characteristics of the antenna such as gain, 3 dB

beamwidth and F/B ratio within adequate range. The

results are shown for various stub lengths (SL) in [Fig.6]

[Fig.7] [Fig.8].


SPECIAL ARTICLE


14

Introduction of circumferential (radial) stubs in the QHA

have influenced greatly on the AR beamwidth as shown in

[Fig.7]. The 3 dB AR beamwidth varied from 118o to 223

o

as the length of the radial stubs is increased from 0 mm to

10 mm in all monofilars as shown in [Fig.7], keeping the

front to back ratio

Fig. 7. Effects of different stub lengths on radiation characteristics

of QHA.

Fig. 8. Effects of different stub lengths on resonant frequency and

VSWR of the modified QHA variants

Simultaneously, this configuration of QHA achieved a

reduction in size of approximately 24 percent (Resonant

frequency reduces to 2460 MHz from 3240 MHz) when

compared to conventional QHA as frequency has decreased

with the addition of the stub length .

In this paper, we have demonstrated that a significant

increase in the axial ratio beamwidth (223o) of a QHA can

be achieved by folding the helix in the region where the

current amplitude is at its minimum. This simple technique

is suitable for LEO/MEO satellites and hand held receivers

for better and wide angular or lower elevation angles

reception of the circularly polarized signals. Furthermore,

this antenna configuration achieved reduction in size of

approximately 24%.

An official signing ceremony of Memorandum of Understanding between Universiti Tun Hussein Onn Malaysia

(UTHM) and Institute of Space Technology (IST), Islamabad was held on 30th

August 2013 at Banquet Hall Tunku

Tun Aminah Library UTHM.

Since the official MoU ceremony, researchers from both the institutions have been working collaboratively on Wireless

Communications and Antenna Technology.


WARAS RESEARCH CLUSTERS


15

RADIO FREQUENCY &

RECONFIGURABLE ANTENNA DESIGN

MICROWAVE DEVICES AND

FREQUENCY SELECTIVE SURFACES

Leader

Assoc. Prof. Dr.

Muhammad Yusof

Ismail

Leader

Dr. Fauziahanim Che

Seman

Members

Prof. Ayob Johari Members

Prof. Ir. Dr. Zainal

Abidin Ahmad

Dr. Nor Shahida Mohd

Shah Elfarizanis Baharudin

Shipun Anuar Hamzah

MOBILE AND WIRELESS

COMMUNICATIONS SOFTWARE DEVELOPMENT

Leader Assoc. Prof. Dr. Jiwa

Abdullah Leader

Dr. Khairun Nidzam

Ramli

Members

Dr. Noorsaliza Abdulah Members Dr. Kavikumar Jacob

Mohd Hakimi Zohari Sharifah Saon

MULTI-DISCIPLINARY RESEARCH RADIO SCIENCE

Leader Dr. Nor Shahida Mohd

Shah Leader

Dr. Mariyam Jamilah

Homam

Members


Members

Dr. Mohd Hezri Mohd

Lwi@Mokhtar

Dr. Karthigesu A/L

Nagarajoo

Abul Khair Anuar

P. M. Dr. Muhammad

Mahadi Abdul Jamil

P. M. Dr Zawati Harun

Research Projects

In line with the focused research areas of WARAS, a number of research grants have been

granted from various agencies which enable research activities to be carried out efficiently. On-

going research grants are as follows:

No Vot Title Source

1 1119

Integrated Antenna Technology for Automotive Systems.

Leader: Assoc. Prof. Dr. Muhammad Yusof Ismail

(Collaboration with ANGKASA, UKM)

RACE

2 1233

Characterisation of Ionospheric Propagation at the Equatorial and Polar

Regions

Leader: Dr. Mariyam Jamilah Homam

FRGS

3 U102

Polarization-Independent Multi-Channel Regeneration Based On Fiber-

Optic Parametric Amplifier

Leader: Dr. Nor Shahida Mohd Shah

RSGS

4 1323

Multi-band Characterizable Graphite Based Antenna With Low Cross

Polarization Performance For Radio Astronomy Systems

Leader: Assoc. Prof. Dr. Muhammad Yusof Ismail

MDR

RESEARCH

CLUSTERS


16

No Vot Title Source

5 U103

Investigation of Dielectric Behaviors of Ananas Comosus for

Ripeness Assessment using Non-invasive Technique

Leader: Dr. Fauziahanim Che Seman

RSGS

6 1437

Multi-channel Phase Shift Keying Signal Regeneration Based On

Fiber-Optic Parametric Amplifier

Leader: Dr. Nor Shahida Mohd Shah

RACE

7 1432

The Effect Of Culture-based Multi-modal Mind Games Immersion

On The Social Interaction Skills Of Autistic Children

Leader: Prof. Dr. Maizam Alias

FRGS

8 1449

Understanding The Mediation And Moderation Roles Of Affects In

The Intefrated Affective-cognitive Learning Approach And Academic

Achievement Relationship

Leader: Prof. Dr. Maizam Alias

ERGS

Congratulations to Hairul Nizam Tukimin and Dr. Nor Shahida Mohd Shah on the arrival of your little angel. May your new born angel live a long and happy life. Congratulations!

CONGRATULATIONS !!!

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