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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
H. A. Majid
Universiti Tun Hussein Onn Malaysia
Computer Science & IT Electrical & Electronics Engineering

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Journal : International Journal of Electrical and Computer Engineering

 1 
Dual Band to Wideband Pentagon-shaped Patch Antenna with Frequency Reconfigurability using EBGs Raimi Dewan; M. K. A. Rahim; M. R. Hamid; M. F. M. Yusoff; H. A. Majid; B. A. F. Esmail
International Journal of Electrical and Computer Engineering (IJECE) Vol 8, No 4: August 2018
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (707.952 KB) | DOI: 10.11591/ijece.v8i4.pp2557-2563

Abstract

A dual band to wideband reconfigurable pentagon-shaped antenna with EBG unit cell is proposed. A minimal number of two EBG unit cell is deployed to realize frequency reconfigurable mechanism.  By varying the state of the EBG the antenna is capable to change its dual band operation to wideband alternately. There are three cases that have been analysed, first case is the EBG incorporated antenna with ideal and second is with the active EBG. Subsequently, the third cases is the fabricated ideal EBG incorporated antenna. The dual band operation is at 1.8 GHz and 5.2 GHz while the wide band from 1.6 GHz to 2.37 GHz (770 MHz). The proposed reconfigurable antenna is suitable to be implemented for LTE (1.6 GHz), Wi-Fi (5.2 GHz), WiMAX (2.3 GHz) and cognitive radio application.
The Improvement of first Iteration Log Periodic Fractal Koch Antenna with Slot Implementation N. S. M. Yaziz; M. K. A. Rahim; F. Zubir; N. S. Nadzir; R. Dewan; H. A. Majid
International Journal of Electrical and Computer Engineering (IJECE) Vol 8, No 4: August 2018
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (983.518 KB) | DOI: 10.11591/ijece.v8i4.pp2564-2570

Abstract

In this paper, a slotted is introduced at each of the radiating elements on the 1st iteration log periodic fractal Koch antenna (LPFKA). The antenna is designed to testify the appropriate performance at UHF Digital television which operates from 4.0 GHz to 1.0 GHz. The dimension of the conventional 0th iteration LPKFA is successfully reduced by 17% with the implementation of slotted. The results show a good agreement with a stable radiation pattern across the operating bandwidth, stable gain more than 5 dBi and reflection coefficient of below -10 dB over the desired frequency range.
Co-Authors A. A. Rosman A. Ashyap A. Ponniran A. S. Ab Ghafar A. Y. Ashyap Amerrul Zabri B. A. F. Esmail B. D. Bala C. Macwright F. A. Saparudin F. C. Seman F. Hassan F. Zubir F. Zubir K. Kamardin M. A. Abdullah M. A. Z. A. Rashid M. E. Jalil M. F. Ismail M. F. M. Yusoff M. Jusoh M. K. A. Rahim M. K.A. Rahim M. M. Gajibo M. M. Zahar M. Mohamad M. N. A. H. Shaabani M. R. Hamid M. S. Mohd N. A. Murad N. A. Samsuri N. Katiran N. M. Nadzir N. Othman N. S. M. Yaziz N. S. Nadzir Najib Al-Fadhali Norsaidah Muhamad Nadzir O. Ayop R. Dewan Raimi Dewan S. A. Hamzah S. H. Dahlan S. M. Shah S. Mohamad Shaharil Mohd Shah T. C. Chee Z. Z. Abidin