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All Journal JMECS (Journal of Measurements, Electronics, Communications, and Systems) International Journal of Electronics and Communications Systems
Adiwidya, Andre Suwardana
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Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Engineering Materials Science & Nanotechnology

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Measurement of Motor Vehicle Emissions Based on Low-cost Sensors Kurniawan, Michelle; Ardiles, Sopaheluwakan Alesandro; Adiwidya, Andre Suwardana; Ummi, Annisa Zahwatul; Halinda, Maulana Fauzan Athalla; Okthaviany, Indah Cikal Al Gyfary; Gajah, Deni Ali Marwan; Hidayat, Putri Naila Alyana; Lalintia, Irvin Judah; Kampong, Prichel Adisatya; Salam, Rahmat Awaludin; Chandra, Indra
JMECS (Journal of Measurements, Electronics, Communications, and Systems) Vol. 10 No. 2 (2023): JMECS
Publisher : Universitas Telkom

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25124/jmecs.v10i2.6002

Abstract

One of Indonesia's primary causes of air pollution is the significant level of human activity, particularly the continued use of fossil-fuel-powered vehicles. The incomplete combustion of fossil fuels can lead to gas and particle pollutants forming, impacting the environment. However, the instruments utilized for detecting environmental pollutants are relatively expensive. Therefore, motor vehicle emission tests use low-cost sensors with parameters such as CO, CO2, NO2, PM2.5, temperature, and RH. The flow rate measures the emission gas flow extracted from a vehicle's exhaust into the testing chamber and then released into the air for disposal. The flow rate utilized in these tests ranges from 12 to 15 lpm. The tests are conducted over 10 minutes to ensure accuracy, obtaining average readings for the measured parameters. For the measurement results using a low-cost sensor, the average value for CO is 383.891 ppm, NO2 is 10.7237 ppm, CO2 is 5,254 ppm, PM2.5 is 50.25 ?g/m3, temperature and RH is 28.9 °C and 76%. The official test results obtained a CO value of 1,200 ppm, CO2 of 140,000 ppm, and a temperature of 80 °C. This difference is because the reading range of low-cost sensors is relatively small but has a stable data trend.
Analysis of Spatio-temporal PM2.5 and CO2 Concentrations Distribution with PSCF in the Greater Bandung Air Basin Adiwidya, Andre Suwardana; Aziz, Reza Mochamad; Afryan, Muhammad Beno; Alexandra, Tania Christiana; Permadi, Mario Gilang; Jannah, Nur Rawdotul; Amalia, Dini Rizqi; Sopian, Nur Putri Megalia; Lee, Vivian; Salam, Rahmat Awaludin; Chandra, Indra
JMECS (Journal of Measurements, Electronics, Communications, and Systems) Vol. 10 No. 1 (2023): JMECS
Publisher : Universitas Telkom

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25124/jmecs.v10i1.6003

Abstract

The limitations of expensive main monitoring stations can be addressed by using low-cost sensor-based measuring stations. A low-cost sensor-based air quality monitoring system has been implemented in Telkom University, BRIN Pasteur, and BRIN Taman Sari areas to measure PM2.5 and CO2 concentration in Bandung vertically and horizontally. Vertically, the CO2 concentration at the highest measuring station is indirectly affected by local activities. However, PM2.5 concentration is still influenced by local actions. Horizontally, using the independent T-test and ANOVA, PM2.5 concentrations tended to be homogeneous regarding the significance values in the four periods, namely 0.916, 0.03, 0.727, and 0.047. Meanwhile, the concentration of CO2 at each station tends to be heterogeneous along significance values of 0.646, 0.03, 0.02, and 0.01. The vertical and horizontal analysis shows that CO2 concentrations tend to be heterogeneous due to differences in altitude and spatial characteristics of the measurement sites. Meanwhile, PM2.5 tends to be more homogeneous by having the same pattern at different heights and spatial locations. The long-distance potential sources of PM2.5 are estimated to come from the Indian Ocean and Cirebon region because they have the highest PSCF and CWT values, 0.5-0.7 and 55-65 µg/m3.
Design and Simulation of an Aperture-Coupled Microstrip Patch Antenna for 6 GHz FR1 Band Applications Santoso, Subekti Ari; Adiwidya, Andre Suwardana; Martini , Ni Putu Devira Ayu; Jantarachote, Vasan
International Journal of Electronics and Communications Systems Vol. 6 No. 1 (2026): International Journal of Electronics and Communications System
Publisher : Universitas Islam Negeri Raden Intan Lampung, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24042/ijecs.v6i1.30762

Abstract

Microstrip patch antennas are widely used for 6 GHz FR1 applications, but practical design references in this frequency band are still limited. This study aims to investigate the design and electromagnetic performance of a compact aperture coupled microstrip patch antenna (ACMPA) operating near the 6 GHz FR1 spectrum using full-wave simulations in CST Studio Suite. Two antenna configurations were designed and evaluated using CST Studio Suite on a Rogers RT/duroid® 6002 substrate. The antenna performance was evaluated in terms of reflection coefficient, VSWR, impedance bandwidth, realized gain, and radiation efficiency. The optimized design (D2) achieves an impedance bandwidth of approximately 73 MHz (6.03–6.11 GHz) with VSWR below 2, a realized gain of approximately 7.7 dBi, and radiation efficiency close to 75%. The simulation results indicate that optimizing the coupling-antenna geometry optimization enhances the electromagnetic coupling mechanism, resulting in improved impedance matching, realized gain, and radiation efficiency while preserving a compact single-element antenna structure. These findings confirm that optimizing the aperture geometry in a single-element configuration is an effective design strategy that reduces fabrication complexity to improve the performance of compact ACMPA antennas.
Co-Authors Afryan, Muhammad Beno Alexandra, Tania Christiana Amalia, Dini Rizqi Ardiles, Sopaheluwakan Alesandro Aziz, Reza Mochamad Gajah, Deni Ali Marwan Halinda, Maulana Fauzan Athalla Hidayat, Putri Naila Alyana Indra Chandra Jannah, Nur Rawdotul Jantarachote, Vasan Kampong, Prichel Adisatya Kurniawan, Michelle Lalintia, Irvin Judah Lee, Vivian Martini , Ni Putu Devira Ayu Okthaviany, Indah Cikal Al Gyfary Permadi, Mario Gilang Rahmat Awaludin Salam Santoso, Subekti Ari Sopian, Nur Putri Megalia Ummi, Annisa Zahwatul