cover
Article Per Year (5 Year)
All
Home Page
OAI Link
Editorial Team
Contact
Reviewer
Google Scholar
Contact Name
Agus Wagyana
Contact Email
spektral@elektro.pnj.ac.id
Phone
-
Journal Mail Official
spektral@elektro.pnj.ac.id
Editorial Address
http://jurnal.pnj.ac.id/index.php/spektral/about/editorialTeam
Location
Kota depok,
Jawa barat
INDONESIA
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 5 Documents
 1 
Search results for , issue "Vol. 4 No. 1 (2023): April 2023" : 5 Documents clear
Rancang Bangun Alat Pendeteksi Uap Vaping dan Asap Rokok Berbasis Internet of Things Terintegerasi Aplikasi Android Rifqi Fuadi Hasani; Benny Nixon; Alifa Humairah; Augita Yasmin
Spektral Vol. 4 No. 1 (2023): April 2023
Publisher : Politeknik Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32722/spektral.v4i1.5629

Abstract

Smoking is one of causes disease which especially on respiratory tract because the cigarette were content that is not good for body. Passive smoker is really made a loss for smoke/vapor that they inhaled. So therefore, smoke detector was created by using connection of WiFi that connected to ESP32 which sending data of detection  from MQ-2 sensor (detect content’s smoke of tobacco cigarette) and Adafruit sensor (detect content’s vapor of e-cigarette) to firebase that integrated by android software. This would faciliated for hotel firm because the hardware not only detect smoke of cigarette, but also vapor of vape will detected so guest that disobey the rules who using except cigarette will be fined which will be monitored by hotel’s employee remotely via android software. System of this hardware specifically only for once detected which if it detected, then green LED changed to yellow (e-cigarette) if the amount shows ≥ 25 ppm and/or red (tobacco cigarette) ) if the amount shows ≥ 0.05 ppm which followed by sound of buzzer and DC fan that will dispensed smoke/vapor out of room. Neutral room which was tested for 10 minutes produced a maximum of 0.03 ppm amount of detected smoke and 24 ppm amount of detected vapor. In the MQ-2 sensor experiment with a level of 1 burst it produces 0.42 ppm and delay of 2 seconds for the sensor to detect, in a room with a volume of 1050 m3 it returns clean with a delay of 11 seconds with amount of 0.04 ppm. In the Adafruit sensor experiment with a concentration of 1 burst it produces 33 ppm, a delay of 2 seconds for the sensor to detect, in a room with a volume of 1050 m3 it returns clean with a delay of 8 seconds with amount of 24 ppm.
A Methodology to Plan Wireless Network in Indonesian Rural Areas Nazmia Kurniawati
Spektral Vol. 4 No. 1 (2023): April 2023
Publisher : Politeknik Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32722/spektral.v4i1.5558

Abstract

Wireless telecommunication networks have been widely implemented in Indonesia. However, the planning methodology hasn’t been intensively studied. In this paper, we proposed a novel methodology for wireless local area network planning in Indonesian rural area. Our proposed method consists of eleven steps of work emphasizes the ease of implementation, market survey consideration, Indonesian Government standard application, and free tools usage optimization. At the end, an example of a network design created by following the proposed methodology for Sebira Island is presented.
Rancang Bangun Sistem Miniatur Smart Garden dengan Aplikasi Android Berbasis Internet of Things (IoT) Alvionita Pingkan; Indira Marasti; Benny Nixon
Spektral Vol. 4 No. 1 (2023): April 2023
Publisher : Politeknik Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32722/spektral.v4i1.5645

Abstract

Gardening is an activity widely practiced for the preservation of plants or simply as a hobby. However, gardening is still quite challenging for many people due to limited available land. Apart from land constraints, another inhibiting factor is the reliance on manual tasks, such as the watering process. Therefore, one solution that can be implemented is to create a miniature garden with a system that can control and monitor Soil Moisture, temperature, air humidity, and light intensity. The smart garden miniature system utilizes Arduino IDE software, an ESP32 module as the microcontroller, Soil Moisture sensors, DHT-22 sensors, an L298N motor driver to operate the water pump and exhaust fan, and relays connected to LED strips. This system is connected to an Internet of Things-based Android application. The results show that the control and monitoring system operates effectively, in line with the predetermined design.
Perancangan Antena Vivaldi Antipodal 2 - 18 GHz untuk Radio Direction Finder Deri Latika Herda; Siska Aulia; Frenzi Agres Yudithia
Spektral Vol. 4 No. 1 (2023): April 2023
Publisher : Politeknik Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32722/spektral.v4i1.5654

Abstract

The 2-18 GHz frequency band is a spectrum that is widely used for telecommunication systems, both military and civil. This is proportional to the number of illegal uses. This research develops an antipodal vivaldi antenna to support direction finding activities of illegal transmitters in the 2-18 GHz frequency band. Antenna design is a simulation using CST software by modifying the ground, widening the antenna arm, and increasing the length of the transmission line. The antenna design measures 94.14 x 73.2 mm on FR-4 substrate with a dielectric constant of 4.6 and a thickness of 1.6 mm. The simulation results show that the antipodal vivaldi antenna has a value -49.95378 dB ≤ S11 ≤ -10.022357 dB, 1.0066947≤ VSWR ≤1.9248251 and an average gain of 5.1558 dB in the 2-18 GHz frequency band.
Pengukur Gula Darah Non-Invasif Berbasis Internet of Things Nila Novita Sari; Angely Fransiska Kurnia Lazha
Spektral Vol. 4 No. 1 (2023): April 2023
Publisher : Politeknik Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32722/spektral.v4i1.5864

Abstract

Diabetes is a chronic disease characterized by high blood sugar levels. Without proper attention and treatment, diabetes can become a deadly disease. It is estimated by the International Diabetes Federation, that by 2045 there will be 28.6 million diabetics in Indonesia. Monitoring blood sugar levels regularly every day can help diabetics continue to monitor blood sugar levels so that they remain within normal limits. Generally checking blood sugar must be passed with an uncomfortable and even painful feeling because a blood sample is needed. The process of taking blood samples is known as an invasive method, namely by pricking a fingertip with a lancet so that blood comes out, then a drop of blood is placed on a test strip and the results will come out on the glucose meter. To facilitate monitoring of blood sugar levels, this research has developed a non-invasive tool that can help diabetics control their blood sugar levels. By utilizing the Near-Infrared Spectroscopy method, the examination will be carried out more comfortably, painlessly, and affordably. This tool, which was built using the Flame Detection Module and ESP32, has been functioning with an error percentage in the tests conducted on 5 volunteers of 17.9%. The output resulting from measuring blood sugar levels will be sent to Telegram application along with the measurement date so that the data can be used as a daily monitoring record.

Page 1 of 1 | Total Record : 5

 1 

Filter by Year

2023 2023


Reset
Filter By Issues
All Issue Vol. 6 No. 2 (2025): Oktober 2025 Vol. 6 No. 1 (2025): April 2025 Vol. 5 No. 2 (2024): Oktober 2024 Vol. 5 No. 1 (2024): April 2024 Vol. 4 No. 2 (2023): Oktober 2023 Vol. 4 No. 1 (2023): April 2023 Vol. 3 No. 2 (2022): Oktober 2022 Vol. 3 No. 1 (2022): April 2022 Vol. 2 No. 2 (2021): Oktober 2021 Vol. 2 No. 1 (2021): April 2021 Vol. 1 No. 1 (2020): Oktober 2020 More Issue