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All Journal International Journal of Information System and Innovative Technology
Thennarasan Sabapathy
Universiti Malaysia Perlis
Computer Science & IT

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Design of a Compact Multi-Band Circularly Polarized Antenna for Tracking and Localization Applications Shanmuka Rooban Gunasekaran; Nordiana Mohamad Saaid; Thennarasan Sabapathy; Muzammil Jusoh; Mohamed Nasrun Osman; Saidatul Norlyana Azemi; Siddarth Pichandi; Suresh Ponnan
International Journal of Information System and Innovative Technology Vol. 5 No. 1 (2026): June
Publisher : Geviva Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.63322/mje6dj25

Abstract

This project is about designing a compact multi-band circularly polarized antenna for tracking and localization applications which is receiver type of antenna. Existing commercial GPS antenna uses 2 frequency bands which have linear polarization (LP), less robust to the future GPS receiver system. Thus, in this project, a multi-band circularly polarized antenna will be designed. The antenna is a multi-band type antenna since it is radiating at three GPS frequency bands. The antenna development starts with creating three different size of patch which is known as L1, L2 and L5. L5 (1.164GHz -1.189GHz) is the smallest frequency among those three, L2 (1.215GHz -1.240GHz) is the middle range frequency and the biggest frequency is L1 (1.563GHz -1.588GHz). The size of the antenna will be approximately 100mm by 50mm because it is a handheld receiver antenna hence it is required to be small in size. This antenna uses Rogers and FR-4 as the substrate and copper as the ground plane and patch of the radiating element. All the design and simulation results are conducted using CST Studio Suite 2016 software. Based on the result, it is shows that the antenna producing 3 different frequency band with all the return loss value is under -10 dB. It is also producing an omnidirectional radiation pattern with axial ratio less than 3dB. For polarization, the antenna is right hand circular polarization (RHCP) and producing a reasonable gain for GPS application.
Reconfigurable Dual Band Antenna using Varactor Diode Ali Mohammed Ahmedalsayaghi; Thennarasan Sabapathy; Mohamed Nasrun Osman; Shanmuka Rooban Gunasekaran; Sri Man Kumari Gollu; Divya Gayathri Poripireddy
International Journal of Information System and Innovative Technology Vol. 4 No. 2 (2025): December
Publisher : Geviva Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.63322/1epsgh59

Abstract

This paper presents a dual-band frequency reconfigurable microstrip antenna integrated with an Electromagnetic Band Gap (EBG) structure for modern wireless communication applications. The proposed antenna operates at two key frequency bands of 1.8 GHz and 2.4 GHz and is fabricated on a Rogers 4003C substrate to achieve low dielectric loss and stable radiation performance. Frequency reconfigurability is achieved by embedding varactor diodes across strategically etched slots on the radiating patch, allowing continuous tuning through DC bias voltage control without altering the physical structure of the antenna. The EBG structure is employed to suppress surface wave propagation and enhance antenna gain and radiation stability. Simulation and experimental results demonstrate effective frequency tuning from 1.68–1.88 GHz and 2.38–2.81 GHz with stable impedance matching and directional radiation patterns. The proposed antenna is suitable for compact and reconfigurable wireless systems such as IoT and 5G applications.
Reflection Phase Characterization of Metasurfaces Enabling Reflection and Transmission in Wireless Systems Rajkumar Maniam; Thennarasan Sabapathy; Mohamed Nasrun Osman; Muzammil Jusoh; SIDDARTH PICHANDI
International Journal of Information System and Innovative Technology Vol. 4 No. 2 (2025): December
Publisher : Geviva Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.63322/2wzh1z83

Abstract

This paper presents the design and analysis of metasurfaces for surface-based wireless communication systems. Metasurfaces are widely used as reflecting or transmitting surfaces in wireless communications. The reflection phase characteristic of a metasurface plays an important role in determining its operating behavior, namely whether it functions as a reflector or a transmitter. In this work, a comprehensive analysis is conducted to obtain two distinct reflection phase characteristics of metasurface unit cells. The unit cells are analyzed at an operating frequency of 3.5 GHz. It is observed that the unit cell exhibits a reflection phase close to 0° when designed using two rectangular rings, while a reflection phase close to 180° is achieved when the unit cell is modeled as a square ring. In both designs, the unit-cell substrate size is fixed at 16.25 × 16.25 mm². The presented reflection phase characterization provides a clear design guideline for selecting metasurface unit-cell geometries to support reflection and transmission functionalities in future surface-based wireless communication systems.
Co-Authors Ali Mohammed Ahmedalsayaghi Divya Gayathri Poripireddy Mohamed Nasrun Osman Muzammil Jusoh Nordiana Mohamad Saaid Rajkumar Maniam Saidatul Norlyana Azemi Shanmuka Rooban Gunasekaran Siddarth Pichandi SIDDARTH PICHANDI Sri Man Kumari Gollu Suresh Ponnan