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All Journal Brilliance: Research of Artificial Intelligence JATAED: Journal of Appropriate Technology for Agriculture, Environment, and Development SULIWA: Jurnal Multidisiplin Teknik, Sains, Pendidikan dan Teknologi
Popy Maria
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.
ANALISIS DATA PENERIMAAN SINYAL ADS-B DALAM MENENTUKAN LOKASI PESAWAT MENGGUNAKAN RTL-SDR DAN LOW NOISE AMPLIFIER Adam Bintang Defino; Popy Maria; Sahid Ridho; Ummul Khair
SULIWA: Jurnal Multidisiplin Teknik, Sains, Pendidikan dan Teknologi Vol. 3 No. 2 (2026): SULIWA: Jurnal Multidisiplin Teknik, Sains, Pendidikan dan Teknologi, Juli 2026
Publisher : LEMBAGA KAJIAN PEMBANGUNAN PERTANIAN DAN LINGKUNGAN (LKPPL)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62671/suliwa.v3i2.240

Abstract

Automatic Dependent Surveillance-Broadcast (ADS-B) allows real-time monitoring of aircraft positions, but Software Defined Radio (SDR) devices such as the RTL-SDR have sensitivity limitations that can affect signal reception quality, especially at long distances or under less than ideal  conditions. This study designs an ADS-B receiver system based on the RTL-SDR equipped with a Low Noise Amplifier (LNA) to amplify weak signals without adding significant noise. The method includes receiver circuit design, antenna installation, LNA integration, and signal reception testing at various distances. Reception data with and without the LNA are compared based on the maximum distance and the number of messages received. The results show that the LNA increases the maximum reception distance from 309.95 km to 417.90 km and improves signal stability at medium and short distances. This system is able to capture more messages, including from aircraft under less than  ideal  propagation  conditions. The combination of the RTL-SDR and LNA has proven to be effective and economical as an alternative to expensive device-based flight monitoring.
Design and Implementation FTTH GPON Network Design Based on Attenuation Measurement and Optisystem Modeling Aprinal Adila Asril; Popy Maria; Ummul Khair; Silfia Rifka; Sri Nita
Brilliance: Research of Artificial Intelligence Vol. 6 No. 3 (2026): Brilliance: Research of Artificial Intelligence, Article Research August 2026
Publisher : Yayasan Cita Cendekiawan Al Khwarizmi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47709/brilliance.v6i3.8946

Abstract

This study aims to design and implement a Fiber to the Home (FTTH) network based on Gigabit Passive Optical Network (GPON) technology using attenuation measurement as an approach to detect physical disturbances in optical fiber through modeling with Optisystem software. The research activities were conducted in a laboratory through several stages, including network topology design, system simulation using Optisystem, implementation of an FTTH trainer module, and attenuation measurement using an Optical Power Meter (OPM). Testing was carried out under various cable conditions, namely normal conditions, bending, damaged core, and variations in dropcore cable length to analyze their effects on attenuation values. The results showed that the attenuation values under normal conditions ranged from 14.94 to 16.23 dB, while under physical disturbance conditions such as bending and core damage, there was a significant increase in attenuation. The addition of cable length also contributed to an increase in attenuation of approximately 0.9 dB for every 5 meters. The Optisystem simulation results were consistent with the link power budget calculations and actual measurements, with a difference of approximately 0.1 dB. Furthermore, cable conditions with severe damage such as a broken core showed attenuation values exceeding 50 dB, which can be used as an indicator of physical disturbances. Overall, this study successfully demonstrates that the attenuation measurement method combined with Optisystem modeling is effective in detecting physical disturbances in FTTH GPON networks. The developed trainer module can also be used as a learning medium to understand attenuation characteristics and the performance of optical fiber networks in a laboratory environment.
Analysis Of Quality Of Service (Qos) For Xl's 4g Lte Network In Padang Panjang City Taufik Hidayat; Zurnawita Zurnawita; Popy Maria
JATAED: Journal of Appropriate Technology for Agriculture, Environment, and Development Vol. 3 No. 2 (2026): 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.v3i2.89

Abstract

The rapid advancement of telecommunications necessitates continuous improvement in service quality, including 4G LTE networks. Padang Panjang's mountainous geography presents specific challenges, requiring a Quality of Service (QoS) analysis to evaluate public service levels. This study aims to measure and analyze the QoS of XL's 4G LTE network in Padang Panjang based on latency, jitter, packet loss, and throughput.The research employed an experimental method, conducting drive tests on planned routes. Data was collected using a smartphone with the TEMS Pocket application to measure parameters and Wireshark to analyze packet data. Results were processed using TEMS Discovery to assess performance against QoS standards.Findings showed an average throughput of 6.46 Kbps, latency of 0.000358 ms, jitter of 0.000356 ms, and packet loss of 0.3%. According to the TIPHON QoS standard, latency, jitter, and packet loss fall into the excellent category. However, throughput is classified as very poor. This indicates that while the XL 4G LTE network in Padang Panjang is stable and capable of supporting real-time services like VoIP and video conferencing, its data transfer speed performance remains severely inadequate. The study concludes that significant improvement in throughput is needed to meet overall service quality expectations.
Co-Authors Adam Bintang Defino Amelia Yolanda Aprinal Adila Asril Deri Latika Herda Gardinia Naz Surya Sahid Ridho Silfia Rifka Sri Nita Taufik Hidayat Ummul Khair Uzma Septima Zurnawita Zurnawita