Papers by Adamu Yau Iliyasu
The effect of biasing line in frequency reconfigurable metamaterial antenna design
Nucleation and Atmospheric Aerosols, 2023

Wideband Frequency Reconfigurable Metamaterial Antenna Design with Double Square SRR
International Symposium on Antennas and Propagation, Oct 1, 2019
This paper presents the design of wideband frequency reconfigurable metamaterial antenna with dou... more This paper presents the design of wideband frequency reconfigurable metamaterial antenna with double square split ring resonator SRR. The design is utilizing left-handed Capacitor to enhance bandwidth. Introducing double square split ring resonator result to improvement of the matching condition. Frequency reconfiguration on the other hand is achieved by inserting PIN Diode switch in a specific slot which reconfigure wideband antenna to single band at 5.2GHz. Computer Simulation Technology (CST) Software was used to determine the effectiveness of the technique and operation of the proposed antenna. From the result obtained, the antenna has a bandwidth range of (2.4-5.4) GHz which is equivalent to fractional bandwidth of 76.92%. The antenna can be used for WLAN applications at 2.4GHz and 5.2GHz.

Indonesian Journal of Electrical Engineering and Computer Science, Sep 1, 2019
This paper presents the design of Wideband Frequency Reconfigurable Metamaterial Antenna by Emplo... more This paper presents the design of Wideband Frequency Reconfigurable Metamaterial Antenna by Employing Split Ring Resonator (SRR) and Complementary Split Ring Resonator (CSRR) for Wireles Area Network (WLAN) Apllication. The design is based on reconfiguring wideband metamaterial antenna by applying frequency reconfiguration technique. This was achieved by employing SRR and CSRR for bandwidth enhacement and two PIN Diode switches at different position for reconfiguration. The antenna has electrical dimention of at 2.4 GHz. Computer Simulation Technology (CST) Software was used to determine the effectiveness of the technique. This design has several advantages like wider bandwidth which cover 2.4 GHz and 5.2 GHz WLAN bands, with three different single bands. From the simulation results, it was found that, the antenna has a bandwidth which covered 2.4 to 5.6 GHz, single bands at 2.5 GHz, 3.0 GHz and 3.5 GHz, with realized peak gain of 2.24 dBi and 3.9 dBi at 2.4 GHz and 5.2 GHz respectively and average efficiency of 96%. The antenna can be used for wireless application and cognitive radio application.
Jurnal elektrika, Apr 24, 2019
A compact triband microstrip patch MIMO antenna is proposed for WLAN applications. The antenna co... more A compact triband microstrip patch MIMO antenna is proposed for WLAN applications. The antenna consists of two patches antenna elements, which are orthogonally placed to each other for high isolation at 2.4, 2.8 and 5.8 GHz frequency bands. On its ground plane, a Complementary Split Ring Resonators (CSRRs) is etched for size reduction and multiband generation. The proposed compact MIMO antenna covers an entire size of 58 x 45 x 1.6 mm 3 , with the patch size of 13.3 x 17.1 mm 2. A 79% size reduction at 2.45 GHz was achieved for miniaturization, with a very low mutual coupling (S21 and S12) of-32 dB at all bands.
The European Proceedings of Social and Behavioural Sciences, May 17, 2019
This is an Open Access article distributed under the terms of the Creative Commons Attribution-No... more This is an Open Access article distributed under the terms of the Creative Commons Attribution-Noncommercial 4.0 Unported License, permitting all non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Frequency Reconfigurable Wideband Metamaterial Antenna Design with CSRR
2019 IEEE Conference on Antenna Measurements & Applications (CAMA)
This work presents the design of wideband metamaterial MTM antenna loaded with frequency reconfig... more This work presents the design of wideband metamaterial MTM antenna loaded with frequency reconfiguration capability. The bandwidth enhancement is based on locating best point of the horizontal slot through parametric studies within the length L3. This horizontal slot is responsible for left-handed capacitor C L to improve bandwidth. Employing CSRR generate negative permittivity which result further bandwidth enhancement at lower and upper band with better matching condition. Two Pin Diode switch reconfigured the antenna from wideband antenna to dual-band antenna. Computer Simulation Technology (CST) Software was used for simulation to determine the accuracy of the technique and it operation. Wideband with bandwidth range (2.3-5.6) GHz was obtained. This wideband is reconfigured to dual band at 2.0 GHz and 5.2 GHz were obtained. Highest peak gain obtained in H-plane are 2.75dBi and 3.24dBi at 2.4 GHz and 5.2 GHz respectively. Based on the results obtained, the antenna can be used for GSM band, lower 5G band and WLAN applications band.

A Novel Computer Aided Detection System for Detection of Focal and Non-Focal EEG Signals using Optimized Deep Neural Network
2021 IEEE Signal Processing in Medicine and Biology Symposium (SPMB), 2021
Epilepsy is a neurological disorder affecting people of all ages. This disorder is reported to af... more Epilepsy is a neurological disorder affecting people of all ages. This disorder is reported to affect over 50 million people, with a majority residing in developing countries [1]. It is a sudden and unprovoked seizure that occurs due to an erratic change in the brains' electrical activity often accompanied by loss of consciousness, uncontrolled motions, jerking, and loss of memory [2] [3]. These inconvenient and undesirable effects undermine the quality of life of epilepsy patients as it's difficult for patients and doctors to predict when and where these seizures would occur. Therefore, it is highly imperative to develop an automated system for monitoring epileptic seizures and to assist clinicians in proper and efficient diagnosing of this disease [4] [5].

Wideband Metamaterial Antenna Design
2018 IEEE Asia-Pacific Conference on Antennas and Propagation (APCAP), 2018
This paper presents the design of composite right/left handed transmission line (CRLH TL) wideban... more This paper presents the design of composite right/left handed transmission line (CRLH TL) wideband metamaterial antenna. The bandwidth enhancement was achieved by replacing horizontal ohm's shape slot with series horizontal slot. A comprehensive parametric analysis using Computer Simulation Technology CST software is carried out by varying the position of the slot $L_{n}$ to determine the effectiveness of the concept and fmd the right position of the slot for obtaining the wideband. From the simulation work, it was found that the impedance bandwidth covered from 2.2 GHz to 4.6 GHz which is equivalent to 75% fractional bandwidth. The antenna has a compact size of 30 by 16.80 mm^2. It has three different resonating bands at 2.6 GHz, 3.4 GHz and4.5 GHz within the range with realised peak gain of 2.39 dBi, 2.41 dBi,, and 3.22 dBi respectively and average efficiency of 95%.

Compact Frequency Selectivity Wideband Reconfigurable Metamaterial Antenna Design
2019 IEEE Asia-Pacific Conference on Applied Electromagnetics (APACE), 2019
This paper presents the design of compact frequency selectivity wideband reconfigurable metamater... more This paper presents the design of compact frequency selectivity wideband reconfigurable metamaterial antenna. The design is based on the principles of composite right/left-handed transmission line CRLH-TL. Series capacitance CL and series inductance LR are used to reduce the quality factor (Q-factor) of the proposed antenna for bandwidth enhancement. Electric couple ELC was introduced to improve the matching condition of the proposed antenna. The antenna was reconfigured by using frequency reconfiguration technique with PIN Diode switches. Computer Simulation Technology (CST) Software is used for simulation work. From the simulation result, wideband with bandwidth range (2.3-5.3) GHz which is equivalent to 80% fractional bandwidth was obtained. The wideband was reconfigured to a single bands resonating at 3.0GHz, 5.2GHz, dual-bands at (4.4GHz, 5.2GHz), (3.7GHz, 4.8GHz) and multi-band with resonating bands at 1.8GHz, 3.7GHz, 4.4GHz, 5.0GHz. The realized peak gain at E and H plane are...

Bulletin of Electrical Engineering and Informatics, 2020
In this paper, a compact triband printed antenna with hexagonal complementary split-ring resonato... more In this paper, a compact triband printed antenna with hexagonal complementary split-ring resonators (CSRRs) for 4G applications is proposed. The proposed multiband antenna is comprised of a rectangular patch antenna on the top plane, while on the ground plane, hexagonal CSRRs are etched for size miniaturization (at the lower bands) and multiband generation. Another effect of the CSRR is the shifting of the initial resonance of the patch antenna from 5.17 GHz to the higher band of 6.18 GHz. The triband of 180 MHz 2.4~2.59, 150 MHz 2.79~2.94 and 420 MHz 6.04~6.46 GHz bands acquired can cover WLAN/Wi-Fi and WiMAX operating bands adequately. This can be achieved by choosing the optimal size and position of the CSRR on the ground plane carefully. The design occupies a total size of 45 x 45 mm2 using the low-cost FR-4 substrate. Good agreements are obtained between the measured results and the simulated, which are discussed and presented.
Bulletin of Electrical Engineering and Informatics, 2020
A unit cell of squared shaped polarization-insensitive switchable metamaterial absorber/reflector... more A unit cell of squared shaped polarization-insensitive switchable metamaterial absorber/reflector is presented. The structure operates at 10.20 GHz under both absorber mode and reflector mode configurations. Copper wire bridging the gaps to form a circular shape structure were used as switches for operation mode selections. The structure was designed on an FR4 substrate, and the incidental wave angles were varied from 0 to 50 degrees. The structure demonstrated almost 100% absorption at resonance, 3.314 GHz percentage bandwidth at 80% as an absorber. On the other hand, as reflector, it demonstrated almost a 90% reflection and a usable bandwidth of 3.327 GHz.

ELEKTRIKA- Journal of Electrical Engineering, 2019
This paper presents the design of compact wideband frequency reconfigurable metamaterial (MTM) an... more This paper presents the design of compact wideband frequency reconfigurable metamaterial (MTM) antenna. The design is based on the idea of obtaining single and multi-bands in wideband metamaterial antenna within the range of bandwidth. This is achieved by introducing capacitive slots which neutralize inductive properties and generate left handed capacitive parameter. The three series slots in the patch contribute for bandwidth enhancement while two PIN Diode Switches provide multi-bands operation. Computer Simulation Technology (CST) software is used to determine the operation and effectiveness of the proposed antenna. The approach has several notable merits which include improvement of spectrum utilization, minimize spectrum congestion, interference and provide bands selectivity. From the simulation results, it was found that, bandwidth was improved to 2.8 GHz which is equivalent to 82% fractional bandwidth. Also, it can switch to seven different frequency bands of operation with ...

Bulletin of Electrical Engineering and Informatics, 2020
This paper presents the design of wideband frequency reconfigurable metamaterial antenna with dou... more This paper presents the design of wideband frequency reconfigurable metamaterial antenna with double H slots. The design is based on the idea of composite right/left-handed transmission line (CRLH-TL) technique. Bandwidth enhancement was achieved by utilizing series left-handed capacitor CL transmission line parameter. The design has several outstanding advantages which include efficient bandwidth to cover many lower Application bands with multi frequency operation characteristics. A comprehensive analysis and simulation were done by using computer simulation technology (CST) software to determine the performance and efficiency of the proposed antenna. From the result obtained, the antenna aquired bandwidth range which covered (2.3-5.2) GHz which is equivalent to 77% fractional bandwidth. The wideband antenna was reconfigured by using frequency reconfiguration technique. From the reconfiguration results, the antenna can be switch from wideband to two single bands which resonate at 2...
The effect of biasing line in frequency reconfigurable metamaterial antenna design
5TH INTERNATIONAL CONFERENCE ON ELECTRICAL, ELECTRONIC, COMMUNICATION AND CONTROL ENGINEERING (ICEECC 2021)
Printed Monopole Antenna Loaded with Circular Split Ring Resonators (CSRRs) for Multi-band Operations
2022 IEEE International RF and Microwave Conference (RFM)
A compact triband miniaturized MIMO antenna for WLAN applications
AEU - International Journal of Electronics and Communications
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Papers by Adamu Yau Iliyasu