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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 : International Journal of Electrical and Computer Engineering

 1 
Design and Analysis High Gain PHEMT LNA for Wireless Application at 5.8 GHz Kamil Pongot; Abdul Rani Othman; Zahriladha Zakaria; Mohamad Kadim Suaidi; Abdul Hamid Hamidon; J.S. Hamidon; Azman Ahmad
International Journal of Electrical and Computer Engineering (IJECE) Vol 5, No 3: June 2015
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (545.921 KB) | DOI: 10.11591/ijece.v5i3.pp611-620

Abstract

This research present a design of a higher  gain (66.38dB) for PHEMT LNA  using an inductive drain feedback technique for wireless application at 5.8GHz. The amplifier it is implemented using PHEMT FHX76LP transistor devices.  The designed circuit is simulated with  Ansoft Designer SV.  The LNA was designed using  T-network as a matching technique was used at the input and output terminal,  inductive generation to the source and an inductive drain feedback. The  low noise amplifier (LNA) using lumped-component provides a noise figure 0.64 dB and a gain (S21) of 68.94 dB. The output reflection (S22), input reflection (S11) and return loss (S12) are -17.37 dB, -15.77 dB and -88.39 dB respectively. The measurement shows the  stability was at  4.54 and 3-dB bandwidth of 1.72 GHz. While, the  low noise amplifier (LNA) using  Murata manufactured component provides a noise figure 0.60 dB and a gain (S21) of 66.38 dB. The output reflection (S22), input reflection (S11) and return loss (S12) are -13.88 dB, -12.41 dB and -89.90 dB respectively. The measurement shows the  stability was at  6.81 and 3-dB bandwidth of 1.70 GHz. The input sensitivity more than -80 dBm  exceeded the standards required by IEEE 802.16.
Adaptive Multi-state Millimeter Wave Cell Selection Scheme for 5G communication Mothana L Attiah; Azmi Awang Md Isa; Zahriladha Zakaria; Nor Fadzilah Abdullah; Mahamod Ismail; Rosdiadee Nordin
International Journal of Electrical and Computer Engineering (IJECE) Vol 8, No 5: October 2018
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2344.847 KB) | DOI: 10.11591/ijece.v8i5.pp2967-2978

Abstract

Millimeter wave bands have been introduced as one of the most promising solutions to alleviate the spectrum secrecy in the upcoming future cellular technology (5G) due the enormous amount of raw bandwidth available in these bands. However, the inherent propagation characteristics of mmWave frequencies could impose new challenges i.e. higher path loss, atmospheric absorption, and rain attenuation which in turn increase the outage probability and hence, degrading the overall system performance. Therefore, in this paper, a novel flexible scheme is proposed namely Adaptive Multi-State MmWave Cell Selection (AMSMC-S) through adopting three classes of mmWave base stations, able to operate at various mmWave carrier frequencies (73, 38 and 28 GHz). Two mmWave cellular Grid-Based cell deployment scenarios have been implemented with two inter-site-distances 200 m and 300 m, corresponding to target area of (2.1 km2) and (2.2 km2). The maximum SINR value at the user equipment (UE) is taken in to consideration to enrich the mobile user experience. Numerical results show an improvement of overall system performance, where the outage probability reduced significantly to zero while maintaining an acceptable performance of the 5G systems with approximately more than 50% of the mobile stations with more than 1Gbps data rate. 
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