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All Journal International Journal of Electrical and Computer Engineering TELKOMNIKA (Telecommunication Computing Electronics and Control) Bulletin of Electrical Engineering and Informatics Indonesian Journal of Electrical Engineering and Computer Science
Zahriladha Zakaria
Universiti Teknikal Malaysia Melaka
Computer Science & IT Electrical & Electronics Engineering

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Journal : telkomnika telecommunication computing electronics and control

 1 
Investigation of Wave Propagation to PV-Solar Panel Due to Lightning Induced Overvoltage Nur Hidayu Abdul Rahim; Zikri Abadi Baharudin; Md Nazri Othman; Zahriladha Zakaria; Mohd Shahril Ahmad Khiar; Nur Zawani Saharuddin; Azlinda Ahmad
TELKOMNIKA (Telecommunication Computing Electronics and Control) Vol 12, No 1: March 2014
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/telkomnika.v12i1.22

Abstract

Lightning produces extremely high voltages that generated induce overvoltage which have a high tendency to effect the electrical apparatus especially renewable energy plant that directly expose to this source. This study was performed through experimental work by investigating the effect of induce overvoltage upon the photovoltaic system. The induce voltage was performed by using lightning impulse generator. It is found that the maximum voltage of the unwanted signal is proportional with the distant of the specimen. The closer distant between solar panel material and spark discharge, the more serious effect would occur due to the induced overvoltage. 
Harmonic Suppression Rectangular Patch Antenna with Circularly Polarized Nurzaimah Zainol; Zahriladha Zakaria; Maisarah Abu; Mawarni Mohamed Yunus
TELKOMNIKA (Telecommunication Computing Electronics and Control) Vol 14, No 2: June 2016
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/telkomnika.v14i2.2394

Abstract

The rectangular patch antenna with proximity coupling at 2.45 GHz is designed and printed on FR-4 substrate with dielectric constant 4.3 and loss tangent 0.019. The overall size of proposed antenna gives 36 % reduction of substrate area as compared to conventional designs. The symmetrical arm of inverted U-stub and U-slot embedded on the transmission feed line suppress harmonic signal effectively at second and third order with minimum reflection coefficients of –0.51 dB and -2.28 dB respectively while circularly polarization was obtained by corner truncated and U-slot on the patch element. The return loss is -23.95 dB at fundamental modes with gain 4.61 dB and axial ratio of 1.48 dB.
Planar Microwave Sensors for Accurate Measurement of Material Characterization: A Review Norhanani Abd Rahman; Zahriladha Zakaria; Rosemizi Abd Rahim; Yosza Dasril; Amyrul Azuan Mohd Bahar
TELKOMNIKA (Telecommunication Computing Electronics and Control) Vol 15, No 3: September 2017
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/telkomnika.v15i3.6684

Abstract

Microwave sensor is used in various industrial applications and requires highly accurate measurements for material properties. Conventionally, cavity waveguide perturbation, free-space transmission, open-ended coaxial probe, and planar transmission line technique have been used for characterizing materials. However, these planar transmission lines are often large and expensive to build, further restricting their use in many important applications. Thus, this technique is cost effective, easy to manufacture and due to its compact size, it has the potential to produce sensitivity and a high Q-factor for various materials. This paper reviews the common characteristics of planar transmission line and discusses numerous studies about several designs of the microstrip resonator to improve the sensor performance in terms of the sensitivity and accuracy. This technique enables its use for several industrial applications such as agriculture and quality control. It is believed that previous studies would lead to a promising solution of characterizing materials with high sensitivity, particularly in determining a high Q-factor resonator sensor.
Co-Authors Abdul Hamid Hamidon Abdul Rani Othman Adib Othman Ahmed Jamal Abdullah Al- Gburi Amirul Aizat Zolkefli Amyrul Azuan Mohd Bahar Amyrul Azuan Mohd Bahar Azlinda Ahmad Azman Ahmad Azmi Awang Md Isa Badrul Hisham Ahmad Fahad Taha Al-Dhief Harry Sucitra Roslan Hasnizom Hassan Huda A. Majid Hussam Hamid Keriee Hussein Alsariera Imran Mohd Ibrahim J.S. Hamidon Jeefferie Abd Razak Kamil Pongot Lavanya Paramasivam Mahamod Ismail Maisarah Abu Maizatul Alice Meor Said Maizatun Muhamad Mawarni Mohamed Yunus Md Nazri Othman Mohamad Ariffin Mutalib Mohamad Harris Misran Mohamad Kadim Suaidi Mohamad Kamal A. Rahim Mohd Muzafar Ismail Mohd Muzafar Ismail Mohd Shahril Ahmad Khiar Mothana L Attiah Mussa Mabrok Mustafa M. Jawad Natasha Binti Abd Hamid Nawres Abbas Nayyef Noor Azwan Shairi Nor Fadzilah Abdullah Nor Hadzfizah Mohd Radi Norhanani Abd Rahman Nur Hidayu Abdul Rahim Nur Zawani Saharuddin Nurhana Abu Hussin Nurhasniza Edward Nurulhalim Hassim Nurzaimah Zainol Rammah Alahnomi Rosdiadee Nordin Rosemizi Abd Rahim Siti Nur Illia Abdullah Siti Rosmaniza Ab Rashid Syed Mohd Iqwan Naqiuddin Syed Jaya Tole Sutikno Yosza Dasril Yully Erwanti Masrukin Zikri Abadi Baharudin