Rebeka Sultana

Work place: Department of Electrical and Electronic Engineering, Shizuoka University, Shizuoka, Japan



Research Interests: Computer systems and computational processes, Artificial Intelligence, Pattern Recognition, Computer Architecture and Organization, Image Compression, Image Manipulation, Computer Networks, Image Processing


Ms. Rebeka Sultana has been received B.Sc (Eng.) degree in Computer Science & Engineering (CSE) from University of Rajshahi, Rajshahi-6205, Bangladesh. Currently she is
a MS student of the Department of Electrical & Electronic Engineering (EEE), Shizuoka University, Japan. Her current research interest are computer vision, pattern recognition, image processing, artificial intelligence, signal processing, digital image processing, automatic control, wireless antenna design and wireless communication.

Author Articles
A Rectangular Microstrip Patch Antenna for Wireless Communications Operates in Dual Band

By Sheikh Dobir Hossain K. M. Abdus Sobahan Md. Khalid Hossain Md. Masud Ahamed Akash Rebeka Sultana Md. Masum Billah

DOI:, Pub. Date: 9 Sep. 2016

A single layer substrate compact dual band rectangular micro-strip patch antenna with transmission line feeding is designed for Wireless Local Area Networks (WLAN) implementation. The desired antenna consists of a rectangular patch having two I-slots and a dielectric material with dielectric constant of 2.4. The use of cavity model with transmission line feed has the favor of low profile, high gain and wide bandwidth of the antenna. The antenna has overall size of 46.9 mm by 38.01 mm and gives bandwidth of about 90 MHz at resonance frequency of 2.45 GHz and that of 115 MHz at 4.1 GHz frequency with Defected Ground Structure (DGS). The antenna with DGS has return losses -21.25 dB at 2.45 GHz and -27.5 dB at 4.1 GHz where the gains are 6.70 dB for 2.45 GHz and 6.80 dB for 4.1 GHz. Finally the designed antenna has been simulated using Computer Simulation Technology (CST) microwave studio 2009 and it is comparable with manual computation results which are found to be suitable for WLAN applications.

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A Linear Polarized Coaxial Feeding Dual Band Circular Microstrip Patch Antenna for WLAN Applications

By Sheikh Dobir Hossain K. M. Abdus Sobahan Md. Khalid Hossain Md. Khalid Hossain Jewel Rebeka Sultana Md. Al Amin

DOI:, Pub. Date: 8 May 2016

A dual band linear polarized micro-strip antenna is designed and simulated to obtain electronic circuit miniaturization of an antenna in high speed wireless local area networks (IEEE 802.11a standard). The proposed antenna contains a substrate layer (FR-4 lossy) with a dielectric constant of 4.4 and there is a circular patch on the upper layer of the substrate. The coaxial probe feed is used to excite the desired antenna which reduces the spurious radiation and hence obtained good efficiency. It is shown that using cavity model 20% excess bandwidth can be achieved while maintaining the lower size of the antenna. An 'E' shaped slot is introduced in the radiating patch to obtain dual band resonance frequency with maximum current distribution on the surface. Finally the simulated results using Computer Simulation Technology (CST) microwave studio 2009 in this design is compared with manual computation results which are found to be suitable for WLAN applications. 

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