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SPEKTRAL : Journal of Communications, Antennas and Propagation
Published by Politeknik Negeri Jakarta
ISSN : -     EISSN : 27745562     DOI : https://doi.org/10.32722/spektral.v1i1
Core Subject : Science, Engineering,
Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Engineering
Komunikasi dan Teknologi Jaringan : Sistem Komunikasi Nirkabel dan Bergerak, Pengolahan Sinyal Digital dan Multimedia, Pengolahan Sinyal Biomedik, Teori Informasi , Modulasi, Pengkodean Sumber dan Kanal, Algoritma dan Protokol Komunikasi, Komunikasi Radio dan Satelit, Penerapan IoT, Jaringan Telekomunikasi, Komunikasi Optik, Jaringan Sensor Nirkabel, Artificial Intelligence, Machine Learning, Computer Vision, Mobile and Cloud Computing, Pervasive Computing, Big Data, Keamanan Jaringan, Cognitive Radio, Embedded System. Antena dan Propagasi: Desain dan Analisa Antena, Microstrip Antena, Penerapan Teori Medan Elektromagnetik, Radar and Remote Sensing, Gelombang mikro dan gelombang millimeter, Pemodelan Kanal dan Propagasi.
Arjuna Subject : Teknik (semua kategori) - Teknik Listrik dan Elektro
Articles 54 Documents
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Implementasi Sensor Ultrasonik HC-SR04 dengan Arduino dan LabVIEW untuk Pengukuran Level Air Arifuddin, Fikri; Rafsyam, Yenniwarti
Spektral Vol. 6 No. 1 (2025): April 2025
Publisher : Politeknik Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32722/spektral.v6i1.7521

Abstract

This study discusses the implementation of the HC-SR04 ultrasonic sensor using Arduino for distance measurement, and the integration of measurement results into LabVIEW. HC-SR04 is used to measure the distance of objects with the principle of ultrasonic wave reflection. Data generated by Arduino is sent to LabVIEW via serial communication, then visualized and analyzed. This method allows real-time data processing and provides interactive visualization to facilitate understanding of measurement results. This experiment successfully demonstrated that the combination of Arduino, HC-SR04, and LabVIEW can provide accurate measurement results with fast response in an air level monitoring system.
Pengembangan Smart Fish Feeding Berbasis Internet of Things pada Budi Daya Ikan Hias Algifri Prayudha Diwiryo; Agus Wagyana; Junianto, Purbo Dwi; Muhamad Reza Febrian
Spektral Vol. 6 No. 1 (2025): April 2025
Publisher : Politeknik Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32722/spektral.v6i1.7535

Abstract

Inappropriate feeding and undetected pond leaks are two major problems in ornamental fish farming that can reduce productivity and operational efficiency. This research aims to develop an Internet of Things (IoT)-based Smart Fish Feeding system capable of automating feeding and monitoring pond conditions in real-time. The system consists of an HC-SR04 ultrasonic sensor to detect feed amounts, a JSN-SR04T sensor to measure water levels, and an ESP32-Cam for visual monitoring. This device is also equipped with a Solenoid Water Valve to automatically regulate water levels and can be controlled via an Android application connected to the Firebase service. This research used a qualitative method with an observational approach and rapid prototyping to design and test the prototype directly at the cultivation site. The test results showed that the system was able to carry out feeding schedules accurately and consistently, and produced an average feed weight per second of 16.38 grams. The developed system has been proven to facilitate fish maintenance and pond management, and has the potential to increase efficiency and responsiveness in ornamental fish farming operations.
Analisa Realisasi Sistem Identifikasi Tingkat Kematangan Buah Tomat Ceri dengan Model YOLOv8 di BBPP Lembang Fathurahman, Mohamad; Hana Fauziah Hanum
Spektral Vol. 6 No. 1 (2025): April 2025
Publisher : Politeknik Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32722/spektral.v6i1.7544

Abstract

Cherry tomatoes, small in size but sweet and nutritious, are increasingly popular and cultivated in Indonesia. The main challenge is determining optimal ripeness for harvesting. Technologies such as YOLOv8 can improve the accuracy of fruit ripeness detection. This study at BBPP Lembang applied YOLOv8 to detect cherry tomato ripeness and analyzed the model's performance and influencing factors. The research method for cherry tomato ripeness analysis using YOLOv8 involved image collection and annotation, data augmentation, and dataset sharing. The model was trained on the Google Colab platform with GPUs, evaluated using metrics such as accuracy and mAP, and then integrated into a website. The system was tested in real-world conditions and monitored regularly to ensure optimal performance. YOLOv8 successfully identified cherry tomato ripeness at BBPP Lembang with a mAP of 77.5%, a precision of 77.6%, a recall of 68.1%, and an F1-score of 72.5% after 100 epochs. The model demonstrated 85.71% accuracy in field trials, succeeding in 6 out of 7 tests. Model performance is influenced by dataset quality, lighting, and image resolution for optimal results. The model achieved 85.71% accuracy in real-time conditions on the website. Dataset quality and lighting influence performance, demonstrating YOLOv8's effectiveness in accurately monitoring fruit ripeness
QoS Analysis on Video Streaming Service Traffic using OSPF Protocol Herfiah, Shita; Wulandari, Asri; Meidiansyah, Muhammad Roby
Spektral Vol. 6 No. 1 (2025): April 2025
Publisher : Politeknik Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32722/spektral.v6i1.7734

Abstract

The demand for video streaming services is constantly increasing, which requires reliable network performance with high Quality of Service (QoS). One of the solutions to improve network performance and guarantee QoS is to implement Multiprotocol Label Switching (MPLS). This research aims to analyze and compare the performance of non-MPLS and MPLS virtual IP networks on video streaming traffic. The research method is conducted through experiments by implementing two routing scenarios, namely non-MPLS networks that implement the Open Shortest Path First (OSPF) protocol and MPLS networks that implement OSPF with the addition of MPLS mechanisms. Tests were conducted using iPerf3 to measure UDP and TCP traffic (upload and download). In addition, QoS parameter analysis was conducted using Wireshark software on video streaming services with 360p, 480p, and 720p resolutions. The results show that MPLS networks can increase throughput, reduce delay and jitter, and reduce packet loss, especially at higher video resolutions. Video with 720p resolution experienced the most significant improvement, namely the throughput value increased by 40.73%, while delay and jitter decreased by 29.40% and 30.28%, and no packet loss was found. This shows that MPLS performance can provide better data transmission for real-time multimedia services such as video streaming.
Sistem Pemantauan Kualitas Udara Portable Menggunakan GPS Berbasis Internet of Things Aziz, Abdul; Rafif, Muhammad; Nurjihan, Shita Fitria; Nixon, Benny
Spektral Vol. 6 No. 2 (2025): Oktober 2025
Publisher : Politeknik Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32722/spektral.v6i2.7852

Abstract

As a natural resource, air plays a vital role in sustaining life. Clean air provides significant benefits to living things, while polluted air can disrupt the balance of the ecosystem. Sources of air pollution include motor vehicle exhaust, fossil fuel-based industrial activities, and forest fires. Maintaining clean air quality requires an air quality monitoring device. With the development of Internet of Things (IoT) technology, this study designed a portable IoT-based air quality monitoring device using a GPS module, MQ-2, MQ-135, MQ-136 sensors, and an LTE module. This device is designed to be easily carried to various locations. The GPS module is used to obtain precise location data, while the integrated air quality sensor will measure parameters such as particulate concentration, toxic gases, and air humidity. The data displayed on the air quality monitoring device are CO, CO2, SO2 values, and location coordinates. The received air quality data complies with the ISPU (Air Pollution Standards Index) standard. Test results show that the sensor can read measurement values ​​with air quality categories of "Good," "Moderate," and "Unhealthy." The Android application can also display test data sent from the Firebase real-time database to the Android application for CO, CO2, SO2, Longitude, Latitude, time, and date.
Perancangan Antena Mikrostrip Rectangular Crab Patch sebagai Antena Eksternal Penerima Sinyal 4G Frekuensi 2,3 GHz Suryani, Mary Alysia; Diwyacitta, Branita Adwitiya; Rafsyam, Yenniwarti
Spektral Vol. 6 No. 2 (2025): Oktober 2025
Publisher : Politeknik Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32722/spektral.v6i2.7920

Abstract

Wireless 4G communication has become an essential part of supporting daily digital services such as internet browsing, video streaming, and low-latency applications. However, 4G signal reception often faces degradation in various locations, particularly in remote areas or inside buildings with structural barriers. One effective solution to enhance signal reception is the use of a microstrip antenna, which offers advantages such as a simple design, compact size, and low manufacturing cost. This study presents the design of a rectangular crab patch microstrip antenna for 4G signal reception operating at a frequency of 2.3 GHz. The antenna was designed with a patch size of 15.5 mm, an inter-element spacing of 62.5 mm, a dielectric constant (εr) of 4.3, and a substrate thickness (h) of 1.6 mm. The simulation results show that the antenna achieved an S₁₁ of –46.26 dB, a VSWR of 1.009, and a gain of 3.53 dB. Overall, the antenna meets the expected performance criteria and is suitable for effective 4G signal reception.
Rancang Bangun Website Sistem Informasi Pelaksanaan Skripsi Program Studi Broadband Multimedia Dwiyanti, Diah; Frendiana, Viving
Spektral Vol. 4 No. 2 (2023): Oktober 2023
Publisher : Politeknik Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32722/spektral.v4i2.6272

Abstract

The utilization of information technology in various sectors has a significant impact on the management of every activity to support effectiveness and the quality of performance. The Broadband Multimedia Study Program need a website for bachelor thesis purpose. In the thesis proposal seminars and defenses, the grading process is done manually on a form, and then the examination committee re-enters and accumulates the data manually, which takes more time and is susceptible to data input errors. Therefore, a website has been created to assist students, examiners or supervisors, and the committee in the thesis process. This website uses MySQL as the database and CSS, HTML, and PHP as the interface. The website's testing is based on the ISO/IEC 25010 testing standard, covering aspects such as functional suitability, performance efficiency, reliability, security, usability, and portability. The results of the functional suitability test achieved a success rate of 100%, with an average page loading time of 1.59 seconds for performance efficiency. Reliability scored 100% and met Telcordia standards. Security showed low vulnerability, usability received a score of 89.46%, indicating it is very good, and the portability test was conducted on four different devices and ran smoothly. Keywords: ISO/IEC 25010, Information System, Thesis, Website
Sistem Pemantau Patroli Keamanan Gedung Menggunakan RFID Berbasis Komunikasi Long Range (LoRa) Nurjihan, Shita Fitria; Nixon, Benny; Siahaan, Abelitho; Kusuma, Dandi
Spektral Vol. 4 No. 2 (2023): Oktober 2023
Publisher : Politeknik Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32722/spektral.v4i2.6309

Abstract

Patrolling is a proactive activity carried out by moving from one place to another, checking and ensuring area security and order. This is necessary because security officers cannot directly observe the areas they handle. To make patrols more efficient, a building guard patrol monitoring system is needed. The patrol officer's equipment is brought closer to the RFID tags in each room. The LoRa Node in the patrol tool then sends data to Firebase via LoRa Gateway in the form of room name, patrol officer's name, username, time, date and status. Then, the Android application will display data on patrol officers' tapping activity in real-time to prevent fraud while on patrol. The LoRa test results using the LOS (Line of Sight) method reached a maximum distance of 900 m and Non-LOS reached a maximum distance of 200 m. Internet connection on Android applications use VSAT. The average QoS parameter results for the VSAT internet network for throughput are 28.88 KB, packet loss is 0%, and delay is 467,697 ms.
ANALISIS TERPUTUSNYA KONEKSI REMOTE CONTROL SWITCHING UNIT (RCSU) PADA PERALATAN MIDDLE MARKER MEREK SELEX Prasojo, Muhamad Adimukti; Toni; Utama, M. Kukuh Darma
Spektral Vol. 4 No. 2 (2023): Oktober 2023
Publisher : Politeknik Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32722/spektral.v4i2.6336

Abstract

The Instrument Landing System (ILS) is one of the flight navigation equipment that functions to provide guidance signals to aircraft in the final approach position towards the runway. ILS consists of three components: Localizer, Glide Path, and Marker Beacon. To facilitate monitoring of its equipment, ILS has a monitoring software called the Remote Control Switching Unit (RCSU). RCSU is used to provide a central visual monitoring station with information about the status of ILS, DVOR, and DME equipment. RCSU is connected to each ILS shelter. This research aims to find a solution to the disconnection issue of the RCSU Middle Marker of the Selex brand. The research method used is qualitative data collection through descriptive data analysis techniques and data collection through semi-structured interviews and participative observation. The method starts with equipment checking, analysis, and problem resolution. Through this research, it was found that the cause of the issue was a damaged RJ 45 connector due to corrosion. The corrosion was caused by rainwater and temperature fluctuations in the surrounding environment.
Implementasi Modul LoRa dan GPS untuk Efisiensi Pengumpulan Sampah Rifai, Ahmad; Octariano, Andafa Eka; Wagyana, Agus; Damas Srihantaran, Omar Rais
Spektral Vol. 4 No. 2 (2023): Oktober 2023
Publisher : Politeknik Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32722/spektral.v4i2.6622

Abstract

One of the issues that is still prevalent in Indonesia is garbage accumulation. This is a result of low public awareness about trash management. Inefficient waste management damages people's health and the area's natural attractiveness. Digital technology and information implementation can help with waste collection management. Low power transmission capabilities are provided by the 2015 version of the Long Range (LoRa) communication protocol. This study creates a LoRa-enabled Smart Garbage Collection system to assist with waste management. GPS module and ultrasonic sensors are used in the construction of the Smart Garbage Collection system. Through the LoRa communication system, the measurement data from the sensors and modules is transmitted to the receiver via the LoRa module. The LoRa point-to-point technique is employed. The Received Signal Strength Indicator (RSSI) is the metric that is examined in LoRa. It should be simpler with this method to keep an eye on the trash can's capacity and to get the coordinates of its location using a LoRa receiver. The test results show that this system has an error percentage of less than 8%, a radius of up to 280 meters, and an RSSI value of -121 dBm in non-line of sight (NLOS).

Page 5 of 6 | Total Record : 54

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