Mohamed Nasrun Osman
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Preferred name
Mohamed Nasrun Osman
Official Name
Mohamed Nasrun, Osman
Alternative Name
Nasrun Osman, Mohamed
Osman, Mohamad N.
Nasrun Osman, Mohd
Osman, Mohamed N.
Osman, Mohamed
Osman, M. N.
Main Affiliation
Scopus Author ID
57189062688
Researcher ID
HKW-4543-2023

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  • Publication
    Design of Reconfigurable Antenna for RFID System
    ( 2021-07-26)
    Renukka Sivakumar
    ;
    Thennarasan Sabapathy
    ;
    Muzammil Jusoh
    ;
    Soh Ping Jack
    ;
    Mohamed Nasrun Osman
    ;
    Salem Al-Bawri S.
    ;
    Jayaprakasam S.
    ;
    Mohd Najib Mohd Yasin
    ;
    Saluja N.
    This paper proposes a reconfigurable antenna for RFID system which can operate between 860MHz to 960MHz frequency that belongs to ultra-high frequency (UHF) band used in Malaysia with the center frequency of 910MHz. One rectangular slot and two triangle-shaped slots are used in designing this antenna. A good circular polarization obtained from the slotted structure along the diagonal axis in the design. RF pin diodes are used as the switching mechanism of the antenna. However, in this work to proof the concept of switching mechanism, copper pins are used as artificial switches. Parasitic elements are deployed on the right and left side of the driven element to assist the radiation pattern reconfiguration. Overall, the proposed antenna able to steer the beam at approximately at -30 , -16 , and 10 with peak gain of 3.2dB and average gain of 2.5dB. With this result, overall coverage of UHF RFID reader antenna could be improved.
  • Publication
    Design of a Compact Reconfigurable Antenna with Hybrid Polarization and Frequency Control for Geofencing Application
    ( 2023-01-01)
    Kandasamy U.D.
    ;
    Thennarasan Sabapathy
    ;
    Muzammil Jusoh
    ;
    Mohamed Nasrun Osman
    A frequency reconfigurable antenna for location monitoring is proposed. The antenna developed can be reconfigured at two frequencies with suitable polarization and radiation pattern which designed for geofencing application, thus it either can operate at 1.575 GHz band or 2.45 GHz band. The expected outcome of this work is that when the user is within the geo-fence area it will use WIFI, while when the user exits the geo-fence area, GPS application will be selected. With the use of two switches, the antenna can operate either at band from 2.335 GHz to 2.593 GHz for S11< -10 dB and from 1.546 GHz to 1.588 GHz at S11 <-6 dB. The axial ratio results of less than 3 dB is achieved at 1.575 GHz with a bandwidth of 20 MHz.
  • Publication
    Higher Order OAM Mode Generation Using Wearable Antenna for 5G NR Bands
    ( 2023-01-01)
    Noor S.K.
    ;
    Arif Mawardi Ismail
    ;
    Mohd Najib Mohd Yasin
    ;
    Mohamed Nasrun Osman
    ;
    Thennarasan Sabapathy
    ;
    Shakhirul Mat Salleh
    ;
    Soh Ping Jack
    ;
    Rambe A.H.
    ;
    Ramli N.
    This paper presents a flexible and wearable textile array antenna designed to generate Orbital Angular Momentum (OAM) waves with Mode +2 at 3.5 GHz (3.4 to 3.6 GHz) of the sub-6 GHz fifth-generation (5G) New Radio (NR) band. The proposed antenna is based on a uniform circular array of eight microstrip patch antennas on a felt textile substrate. In contrast to previous works involving the use of rigid substrates to generate OAM waves, this work explored the use of flexible substrates to generate OAM waves for the first time. Other than that, the proposed antenna was simulated, analyzed, fabricated, and tested to confirm the generation of OAM Mode +2. With the same design, OAM Mode −2 can be generated readily simply by mirror imaging the feed network. Note that the proposed antenna operated at the desired frequency of 3.5 GHz with an overall bandwidth of 400 MHz in free space. Moreover, mode purity analysis is carried out to verify the generation of OAM Mode +2, and the purity obtained was 41.78% at free space flat condition. Furthermore, the effect of antenna bending on the purity of the generated OAM mode is also investigated. Lastly, the influence of textile properties on OAM modes is examined to assist future researchers in choosing suitable fabrics to design flexible OAM-based antennas. After a comprehensive analysis considering different factors related to wearable applications, this paper demonstrates the feasibility of generating OAM waves using textile antennas. Furthermore, as per the obtained Specific Absorption Rate (SAR), it is found that the proposed antenna is safe to be deployed. The findings of this work have a significant implication for body-centric communications.
  • Publication
    Low-Profile and Wider-Angle Beam Tilting Parasitic Array Resonator Antenna with Optimized Deflected Ground Plane on FR-4 Substrate
    ( 2023-04-01)
    Mohd Zainudin N.A.F.
    ;
    Mohamed Nasrun Osman
    ;
    Thennarasan Sabapathy
    ;
    Muzammil Jusoh
    ;
    Mohd Najib Mohd Yasin
    ;
    Mohamad M.K.
    A low-profile and wide-angle radiation pattern reconfigurable antenna is designed, analyzed, and fabricated for wireless sensor network (WSN) applications, which operate at a 2.5-GHz frequency. This work aims to minimize the number of switches and optimize the parasitic size and ground plane to achieve a steering angle of more than 30° using a low cost-high loss FR-4 substrate. The radiation pattern reconfigurability is achieved by introducing four parasitic elements surrounding a driven element. In this work, the single driven element is fed by a coaxial feed, while other parasitic elements are integrated with the RF switches on the FR-4 as the substrate with dimensions of 150 × 100 mm (1.67 × 2.5 λo). The RF switches of the parasitic elements are surface mounted on the substrate. By truncating and modifying the ground plane, the beam steering can be achieved at more than 30° on the xz plane. Additionally, the proposed antenna can attain an average tilt angle of more than 10° on the yz plane. The antenna is also capable of attaining other important results, such as a fractional bandwidth of 4% at 2.5 GHz and an average gain of 2.3 dBi for all configurations. By adopting the ON/OFF condition on the embedded RF switches, the beam steering can be controlled at a certain angle, thus increasing the tilting angle of the wireless sensor networks. With such a good performance, the proposed antenna has high potential to serve as a base station in WSN applications.
  • Publication
    Radiation Pattern Reconfigurable MIMO Antenna with EBG for Improved Steering Performance
    ( 2023-01-01)
    Gopalakrishnan J.B.
    ;
    Thennarasan Sabapathy
    ;
    Mohamed Nasrun Osman
    ;
    Muzammil Jusoh
    ;
    Kavitha K.
    This paper presents a radiation pattern reconfigurable (RPR) multiple-input-multiple-output (MIMO) antenna with an electromagnetic band gap (EBG) for improved steering performance. The designed RPR-MIMO operates at 3.5 GHz with S11 < -10 dB, S21 < -15 dB, steered angle of more than 19° and a minimum average gain of 5 dBi at all steered directions. The proposed EBG structure improved the steering angle that is affected when the RPR is deployed as the MIMO.
  • Publication
    Stretchable and Bendable Polydimethylsiloxane- Silver Composite Antenna on PDMS/Air Gap Substrate for 5G Wearable Applications
    ( 2023-01-01)
    Shakhirul Mat Salleh
    ;
    Ain M.F.
    ;
    Ahmad Z.
    ;
    Abidin I.S.Z.
    ;
    Seng L.Y.
    ;
    Mohamed Nasrun Osman
    An engineered composite conductor is essential for developing a wearable antenna that is not only flexible but also stretchable. This paper presents the use of polydimethylsiloxane (PDMS) as the substrate and custom polydimethylsiloxane-silver conductive paste for wearable applications. The antenna is designed with an air gap PDMS substrate between the patch and sawtooth partial ground at 3.5 GHz to enhance the bandwidth and gain. Furthermore, the proposed antenna is flexible and can be bent as well as stretched up to 20%, making it suitable for use on the human body. This study investigates the antenna's performance under bending and stretching to mimic the human body's structure and movements. Additionally, the specific absorption rate (SAR) of the wearable antenna was analyzed for safety purposes.
  • Publication
    Wearable UHF RFID Antenna based Metamaterial
    ( 2021-01-01)
    Khamaruzaman N.S.
    ;
    Muzammil Jusoh
    ;
    Thennarasan Sabapathy
    ;
    Mohamed Nasrun Osman
    ;
    Subahir S.
    ;
    Jamaluddin M.H.
    This paper presents the development a wearable RFID application that is flexible, compact, low-cost, and suitable for the human body. The study's main goal is to design, build, and test a small and flexible RFID wristband tag antenna with UHF RFID operating frequency at 910 MHz. The result shows a good radiation pattern and an almost ideal VSWR which 1.09. Thus, a wearable UHF RFID tag antenna is designed with a gain of -11.87 dB for bending analysis. The tag features a meander dipole antenna with two square split-ring resonators (SRR) cells. A meander dipole antenna with two square split-ring resonators (SRR) cells is featured on the tag. It's built on a 0.277mm thick photo paper substrate with a dielectric constant of 3.2 and a loss tangent of 0.05. The proposed antenna is then combined with an RFID tag (NXP SL3S1213 UCODE G2iL chip) with an impedance of 23-j224 to evaluate its performance in terms of reflection coefficient, antenna gain, and maximum reading range. The overall size of the antenna tag dimensions is 117 mm × 26 mm.
  • Publication
    High Gain Beam-Steerable Reconfigurable Antenna using Combined Pixel and Parasitic Arrays
    ( 2021-01-12)
    Subramaniam D.
    ;
    Muzammil Jusoh
    ;
    Thennarasan Sabapathy
    ;
    Soh Ping Jack
    ;
    Mohamed Nasrun Osman
    ;
    Alaydrus M.
    ;
    Hodgkinson C.J.
    ;
    Podilchak S.K.
    ;
    Schreurs D.
    This paper presents a pattern reconfigurable antenna for wide beam steering applications at the 9.5 GHz band. The beam steering performance is based on the combination of a Yagi-Uda antenna and its complimenting top pixel structure. The integration of this driven antenna element with its parasitic elements is capable of providing steering of up to ±40° (at -40°, 0° and +40°). However, with the added combination of a reconfigurable pixel array on top, the steering angle of the antenna can then be improved to -45°, 0° and +45°, and with measured gains of between 6.5 and 7.5 dBi. A factor critical in enabling the added beam steering capability is the control of the mutual coupling within the bottom antenna array and the top pixel layer. Results indicate that the proposed antenna could be useful for X-Band radar and other applications that require beam steering.
  • Publication
    A multilayered acoustic signal generator for low power energy harvesting
    ( 2017-10-10)
    Awal M.R.
    ;
    Muzammil Jusoh
    ;
    Hasliza A Rahim @ Samsuddin
    ;
    Thennarasan Sabapathy
    ;
    Mohamed Nasrun Osman
    ;
    Mohd Ilman Jais
    ;
    Kamarudin M.R.
    This paper presents the design and analysis of a multilayer cantilever to harvest vibration energy by generating acoustic signal. To do so, a five layer configuration is used to design the cantilever. Lead Zirconate Titanate (PZT-8), Stainless Steel 405 Annealed, Aluminum and Zinc Oxide are used to develop the layers. Water is used as the medium to analyze the sound propagation pattern. Sound Pressure Level, displacements and electric potential of the cantilever are analyzed along with other parameters. From the results, it is evident that, the proposed cantilever can propagate sound within a range of 78.7 dB to 73.4 dB in a 50 mm spherical distance.
  • Publication
    Multi-Mode Yagi Uda Patch Array Antenna With Non-Linear Inter-Parasitic Element Spacing
    ( 2023-01-01)
    Isa S.R.
    ;
    Muzammil Jusoh
    ;
    Thennarasan Sabapathy
    ;
    Kamarudin M.R.
    ;
    Mohamed Nasrun Osman
    ;
    Alomainy A.
    A low-profile and broad steerable patch array antenna is presented. The improvement of the multi-directional functions from the broadside is very limited for the patch array antenna. In this work, the number of directional beams is enhanced by 40% using a novel approach, inter-parasitic element expansion technique and adopted only four PIN diode switches. Results in simulation and measurement have verified that the patch parasitic array antenna is capable -of generating seven beam patterns directed towards -52°, -30°, -10°, 0°, +10°, +30°, and +52° at the xz-plane. Applying the inter-parasitic element spacing's optimization and minimizing the switching circuitry using four RF PIN diodes on the parasitic elements have contributed to the gain achievement of more than 7 dBi.