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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

M. K. A. Rahim

Universiti Teknologi Malaysia

Author-ID : 2380639

Computer Science & IT Electrical & Electronics Engineering

Published : 17 Documents Claim Missing Document

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Title

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

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.

Diagnosis of Faulty Elements in Array Antenna using Nature Inspired Cuckoo Search Algorithm Shafqat Ullah Khan; M. K. A. Rahim; Murtala Aminu-Baba; Atif Ellahi Khan Khalil; Sardar Ali
International Journal of Electrical and Computer Engineering (IJECE) Vol 8, No 3: June 2018
Publisher : Institute of Advanced Engineering and Science

Detection and correction of faulty elements in a linear array have great importance in radar, sonar, mobile communications and satellite. Due to single element failure, the whole radiation pattern damage in terms of side lobes level and nulls. Once we have detect the position of defective element, then correction method is applied to achieve the desired pattern. In this work, we introduce a nature inspired meta-heuristic cuckoo search algorithm to diagnose the position of defective elements in a linear array. The nature inspired cuckoo search algorithm is new to the optimization family and is used first time for fault detection in an array antenna. Cuckoo search algorithm is a global search optimization technique. The cost function is used as a fitness function which defines an error between the degraded far field power pattern and the estimated one. The proposed technique is used effectively for the diagnosis of complete, as well as, for partial faulty elements position. Different simulation results are evaluated for 40 elements Taylor pattern to validate and check the performance of the proposed technique.

Diagnosis of Faulty Sensors in Antenna Array using Hybrid Differential Evolution based Compressed Sensing Technique Shafqat Ullah Khan; M. K. A. Rahim; I. M. Qureshi; N. A. Murad
International Journal of Electrical and Computer Engineering (IJECE) Vol 7, No 2: April 2017
Publisher : Institute of Advanced Engineering and Science

In this work, differential evolution based compressive sensing technique for detection of faulty sensors in linear arrays has been presented. This algorithm starts from taking the linear measurements of the power pattern generated by the array under test. The difference between the collected compressive measurements and measured healthy array field pattern is minimized using a hybrid differential evolution (DE). In the proposed method, the slow convergence of DE based compressed sensing technique is accelerated with the help of parallel coordinate decent algorithm (PCD). The combination of DE with PCD makes the minimization faster and precise. Simulation results validate the performance to detect faulty sensors from a small number of measurements.

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

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. Y. Ashyap A. Y. Iliyasu Abdul Rashid O. Mumin Amerrul Zabri Atif Ellahi Khan Khalil B. A. F. Esmail B. A. F. Esmail B. D. Bala F. A. Saparudin F. C. Seman F. Zubir H. A. Majid H. M. R. Nurul H.A. Majid Huda A. Majid I. H. Idris I. M. Qureshi K. Kamardin M. A. Baba M. Aminu-Baba M. F. Ismail M. F. Ismail M. F. M. Yusoff M. G. Mustapha M. Inam M. Jusoh M. M. Gajibo M. R. Hamid M.M. Gajibo Mohd Ezwan Jalil Murtala Aminu-Baba N. A. Murad N. A. Samsuri N. H. Sulaiman N. M. Nadzir N. Othman N. S. M. Yaziz N. S. Nadzir Najib AL-Fadhali Najib Al-Fadhali Norsaidah Muhamad Nadzir O. Ayop R. Dewan Raimi Dewan Rosli Omar S. H. Dahlan S. Tuntrakool Sardar Ali Shafqat Ullah Khan Z. Mansor Z. Z. Abidin

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