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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
Z. Zakaria
Universiti Teknikal Malaysia Melaka
Computer Science & IT Electrical & Electronics Engineering

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Journal : Bulletin of Electrical Engineering and Informatics

 1 
Reconfigurable modified wilkinson power divider using PIN diode switch N. Edward; N. A. Shairi; A. Othman; Z. Zakaria; I. D. Saiful Bahri
Bulletin of Electrical Engineering and Informatics Vol 9, No 3: June 2020
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (698.371 KB) | DOI: 10.11591/eei.v9i3.2174

Abstract

In this paper, a reconfigurable modified Wilkinson Power Divider (WPD) was proposed. The operating frequencies of the proposed design were either at 2.5 GHz or 3.5 GHz for Worldwide Interoperability for Microwave Access (WiMAX) applications. This proposed design is reconfigurable in terms of its operating frequency by using PIN diode switches. PIN diode switch was used in this design to reconfigure the microstrip line length. By varying the bias voltage of the PIN diode to +5 V or -5 V, the proposed modified WPD can either operate at 2.5 GHz or 3.5 GHz. Rogers RO4350 (er=3.48, h=0.508 mm) was chosen as the substrate material and copper (thickness=0.035 mm) related to patch of design. Based on simulation results obtained from the Advanced Design System (ADS) software, the modified WPD shows good S-parameter performances at 2.5 GHz and 3.5 GHz. However, the measurement results exhibit frequency shifted. Even though there is a correlation between measurement results and simulation results, the resonant frequency was shifted due to parasitic reactance of the PIN diode.
Design of a wideband strip helical antenna for 5G applications Mohammed Yousif Zeain; M. Abu; Z. Zakaria; Ahmed Jamal Abdullah Al-Gburi; R. Syahputri; A. Toding; Sriyanto Sriyanto
Bulletin of Electrical Engineering and Informatics Vol 9, No 5: October 2020
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (485.426 KB) | DOI: 10.11591/eei.v9i5.2055

Abstract

This paper presents the design of wideband strip helical antenna for 5G application. The strip helical antenna is designed for 5G and wideband applications that provide a wide bandwidth and circular polarization. The helical antenna is planned on at 5.8 GHz frequency by using teflon material. The new designed strip is printed on a substrate then rolled into a helix shape to achieve circular polarization without an impedance matching and that the proposed antenna can be used for potential applications in wideband wireless communication. A wideband bandwidth of 2.41 GHz with a resonant frequency at 5.8 GHz is achieved by the helical antenna on the teflon substrate. The presented antenna on teflon substrate has achieved a gain of 11.2 dB. The antenna design parameters and the simulated results are achieved using the commercial software CST. The proposed antenna can be used for various wireless applications such as wideband, ultra wideband, 5G and wireless applications.
Co-Authors A. M. S. Zobilah A. Othman A. Toding A.A. Zulkefle A.A.M. Isa A.I.A. Rahman Ahmed Jamal Abdullah Al-Gburi Alaa Hamza Omran Ali Abdulateef Abdulbari B. H. Ahmad E. Onn F. A. Azidin Fahad Taha Al-Dhief H. O. Hanoosh H. Othman H. S. Lago I. D. Saiful Bahri Jamal S. Kasim M. Abu M. F. M. Salleh M. I. Hussein M. K. Abdulhameed M. Y. Algumaei M. Y. Zeain M. Zainon M.A.M. Hanafiah M.B. Farriz M.S. M. Isa M.S.M. Isa Mohammed Yousif Zeain Mothana L. Attiah Mowafak K. Mohsen Mowafak khadom Mohsen Murtaja Ali Saare Mustafa Muhammad Jawad N. A. Shairi N. Edward N. Saleh N.F. Johan R. Syahputri S.A.A. Shukor Sriyanto, Sriyanto Tole Sutikno Yaqdhan Mahmood Hussain Z. A. Ghani Z.A. Baharudin