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All Journal Brilliance: Research of Artificial Intelligence JATAED: Journal of Appropriate Technology for Agriculture, Environment, and Development
Amelia Yolanda
Politeknik Negeri Padang, Indonesia
Computer Science & IT Decision Sciences, Operations Research & Management Electrical & Electronics Engineering Engineering Industrial & Manufacturing Engineering Mathematics Mechanical Engineering Other

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Antipodal Vivaldi Array Antenna for LoRa: A Simulation Study within 900–923 MHz Band Deri Latika Herda; Amelia Yolanda; Gardinia Naz Surya; Uzma Septima; Popy Maria
Brilliance: Research of Artificial Intelligence Vol. 5 No. 2 (2025): Brilliance: Research of Artificial Intelligence, Article Research November 2025
Publisher : Yayasan Cita Cendekiawan Al Khwarizmi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47709/brilliance.v5i2.7013

Abstract

LoRa (Long Range) is a wireless communication technology that has gained significant attention in the Internet of Things (IoT) due to its wide coverage and low power consumption. However, its performance is often affected by environmental obstacles that cause signal attenuation and interference. In Indonesia, LoRa is regulated to operate in the 920–923 MHz band, whereas many commercial devices are designed for 915 MHz, leading to suboptimal antenna performance. Therefore, this research aims to design and simulate an antenna that can operate effectively across 900–923 MHz, covering both the commonly used 915 MHz band and the regulated 920–923 MHz band in Indonesia. The proposed design is a 1×2 Antipodal Vivaldi Array antenna using an FR-4 substrate with a dielectric constant of 4.3 and thickness of 1.6 mm. The simulation process was conducted using CST Studio Suite 2019, focusing on the optimization of key geometric parameters such as feedline width, inter-element spacing, flare structure, and ground plane. The simulated results show that the antenna achieves a return loss of –19.11 dB at 923 MHz, a bandwidth of 344.4 MHz, and a gain ranging from 5.103 dBi at 900 MHz to 5.162 dBi at 923 MHz. The radiation pattern is directional, which supports long-range communication requirements. These findings demonstrate that the proposed antenna design meets the specifications for LoRa communication and provides a wideband, directional solution that can enhance the reliability of IoT systems.
4G LTE (Long Term Evolution) Network Optimization Using Physical Tuning Methods for the Kubu Gulai Bancah Area. Muhammad Naufal Az Zaky; Zurnawita Zurnawita; Amelia Yolanda
JATAED: Journal of Appropriate Technology for Agriculture, Environment, and Development Vol. 3 No. 1 (2025): JATAED: Journal of Appropriate Technology for Agriculture, Environment, and Dev
Publisher : LEMBAGA KAJIAN PEMBANGUNAN PERTANIAN DAN LINGKUNGAN (LKPPL)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62671/jataed.v3i1.98

Abstract

This study aims to optimize the 4G LTE network in the Kubu Gulai Bancah area, West Sumatra, which is a suburban area with weak signal and unstable internet speed challenges. The main problem identified is that the network quality is not yet optimal based on Telkomsel's Key Performance Indicator (KPI) parameters, as well as the need for an appropriate optimization method to improve this quality. The research methodology involves a drive test using the G-NetTrack Pro application on a Redmi Note 13 Pro 5G smartphone to collect RSRP, SINR, and Throughput data. The collected data is then processed using MapInfo for visualization and analysis, and simulated with Atoll software for optimization planning. Initial drive test results showed that while RSRP was mostly in the “very good” category (55%) and Throughput was predominantly ‘good’ (84%), SINR was still dominated by the “poor” category (56%). Optimization was performed using physical tuning, specifically adjusting the tilt and re-azimuth of the antenna at Site Campago Ipuh 2, Sector 1, with an azimuth change from 0° to 65°. After optimization, the bad spot area for RSRP decreased from 13.2% to 10.89%, and for SINR from 14.1% to 13.21%. The good category for Throughput also increased from 30.5% to 32%. This optimization successfully improved signal coverage quality and network performance significantly.
Designing Fiber Optic Network Infrastructure with FTTX Configuration Using Network Development Life Cycle (NDLC) Method in Solok Regency Uzma Septima; Amelia Yolanda; Dikky Chandra; Viorryn Aisha Uzhelia
Brilliance: Research of Artificial Intelligence Vol. 5 No. 1 (2025): Brilliance: Research of Artificial Intelligence, Article Research May 2025
Publisher : Yayasan Cita Cendekiawan Al Khwarizmi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47709/brilliance.v5i1.4708

Abstract

In this research, the design of a GPON FTTH network using Google Earth, AutoCAD, and Optisystem applications was conducted in Nagari Rangkiang Luluih, Solok Regency. Fiber To The Home (FTTH) is a fiber optic technology architecture that delivers information from the provider to the user. The method used in this research is the Network Development Life Cycle (NDLC). The feasibility parameters used are Bit Error Ratio, Q factor, and Link Power Budget. There are 2 proposals and 2 designs for each area. From the results of the design and calculations using software, the best results were obtained for the first proposal for Nagari Rangkiang Luluih design 1 and 2, with an average Bit Error Ratio value for Downlink of 10-19 and for Uplink of 10-36, meeting the standard BER of 10-9. The Q factor values are 8.6521 for Downlink and 13.3908 for Uplink, meeting the Q factor standard of 6. And the Link Power Budget values are -19.045 for Downlink and -16.967 for Uplink, below the receiver sensitivity standard (Rx) of -28 dBm. The software calculations show that the proposed design 1 has a good network quality, is feasible, and meets the ITU-T G.984 standard. The total number of Homepassed is 234 houses or 234 ONT, 1 OLT, 4 ODC, 20 ODP for design 1 and design 2.
Co-Authors Deri Latika Herda Dikky Chandra Gardinia Naz Surya Muhammad Naufal Az Zaky Popy Maria Uzma Septima Uzma Septima Viorryn Aisha Uzhelia Zurnawita Zurnawita