Garuda - Garba Rujukan Digital

p-Index From 2020 - 2025

2.042

P-Index

This Author published in this journals

All Journal Prosiding KOMMIT Elektron Jurnal Ilmiah Prosiding Seminar Nasional Sains Dan Teknologi Fakultas Teknik Jurnal Teknologi Informasi dan Ilmu Komputer Setrum : Sistem Kendali-Tenaga-elektronika-telekomunikasi-komputer ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika Orbith : Majalah Ilmiah Pengembangan Rekayasa dan Sosial IJITEE (International Journal of Information Technology and Electrical Engineering) Mitra Akademia: Jurnal Pengabdian Masyarakat SPEKTRAL : Journal of Communications, Antennas and Propagation

Yenniwarti Rafsyam

Politeknik Negeri Jakarta

Author-ID : 354330

Humanities Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Education Electrical & Electronics Engineering Engineering Environmental Science Industrial & Manufacturing Engineering Library & Information Science Social Sciences

Published : 21 Documents Claim Missing Document

Claim Missing Document

Articles

1 2 3

PENINGKATAN GAIN ANTENA MIKROSTRIP PATCH LINGKARAN MENGGUNAKAN PARASITIC SUBSTRAT PADA FREKUENSI 2,4 GHz UNTUK APLIKASI WiFi Nuhung Suleman; Yenniwarti Rafsyam
Prosiding SNST Fakultas Teknik Vol 1, No 1 (2014): PROSIDING SEMINAR NASIONAL SAINS DAN TEKNOLOGI 5 2014
Publisher : Prosiding SNST Fakultas Teknik

Show Abstract | Download Original | Original Source | Check in Google Scholar

Antena mikrostrip memiliki banyak kelebihan, diantaranya bentuknya yang sederhana, compact, ringan, dan murah. Akan tetapi juga memiliki kekurangan, salah satunya yaitu nilai gain yang rendah. Untuk mengatasi permasalahan tersebut, sebagai state of the art pada penelitian ini diusulkan penggunaan parasitic subtrat yang diharapkan dapat meningkatkan gain antena. Parasitic subtrat merupakan penambahan subtrat yang diletakan di atas antena utama dengan jarak tertentu. Desain antena mikrostrip ini bekerja pada frekuensi 2,45 GHz yang berguna untuk aplikasi WiFi. Nilai gain, bandwidth dan return loss (S11) antena akan dibandingkan, antara antena mikrostrip lingkaran konvensional dengan antena mikrostrip lingkaran yang sudah ditambahakan parasitic substrat. Untuk proses perancangan, pada penelitian ini dipergunakan mikrostrip FR4 dengan dielektrik konstan er = 4,3, loss tangen d = 0,002 dan ketebalan h =1,6 mm. Sementara, untuk simulasi digunakan perangkat lunak Advance Design System (ADS). Antena lingkaran ini memiliki dimensi jari-jari 17,5 mm. Hasil simulasi menujukan pada antena mikrostrip lingkaran konvensional memiliki nilai gain = 5,15 dBi, bandwidth = 25 Mhz dan return loss (S11) = -23,679 dB. Sementara antena mikrostrip lingkaran yang sudah ditambahakan parasitic substrat memiliki karakteristrik gain = 7,39 dBi, bandwidth = 50 Mhz dan return loss (S11) = -13,24 dB, nilai ini merupakan hasil optimasi jarak antara patch antena dengan parasitic subtatrat. Peningkatan gain yang paling besar diperoleh saat jarak patch utama dengan parasitic subtrat sebesar 10 mm. Hasil simulasi ini memperlihatkan bahwa antena dengan penambahan parasitic substrat mampu meningkatkan gain sebesar 2,24 dB dan meningkatkan bandwidth sebesar 25MHz. Kata kunci: ADS, gain, parasitic subtatrat, WiFi.

Rancang Bangun Antena Helix 8 Lilitan untuk Sistem Autotracking sebagai Penjejak Unmanned Aerial Vehicle (UAV) Yenniwarti Rafsyam; Jonifan Jonifan; Panji Ibrahim N Ibrahim N
Setrum : Sistem Kendali-Tenaga-elektronika-telekomunikasi-komputer Vol 6, No 2 (2017): Edisi Desember 2017
Publisher : Fakultas Teknik Elektro - Universitas Sultan Ageng Tirtayasa

Technological developments have already penetrated low current at the time of flight of unmanned or commonly called the Unmanned Aerial Vehicle (UAV), which humans no longer need to make direct contact with the spacecraft flight to fly missions such as air monitoring in the form of realtime video. In doing missions flown required good communication and stable in order to avoid loss of signal during the communication process takes place. So we need a reliable telecommunications equipment to meet these needs, one of which is the antenna. In this final project designed three pieces of helix antenna coil 8 which works at a frequency of 5.8 GHz for applications based Autotracking antenna signal level. Systematics design includes mechanisms of designing antenna design simulation results using CST Microwave Studio Software, fabrication, measurement parameters such as return loss, VSWR, gain, Bandwitdh and Radiation Pattern, peformansi Testing and application of antenna. 1 helix antenna measurement results obtained value -17.84 dB Return Loss, VSWR 1.294, 14.53 dB Gain, Bandwitdh 300 MHz. 2 helix antenna obtained value -17.31 dB Return Loss, VSWR 1.315, 15.49 dB Gain, Bandwitdh 300 MHz, Helix Antenna 3 obtained value -18.88 dB return loss, VSWR 1.256, 15.97 dB Gain, Bandwitdh 240 MHz and shaped radiation pattern unidirectional. The test results Autotracking Antenna system based signal levels have a pretty good angle accuracy with a percentage error of the corner angle toward the target of 0.83%.

Perancangan Antena Mikrostrip Patch Circular menggunakan metode Array 1x8 untuk Aplikasi Radar Maritim Frekuensi 3,2 GHz Jonifan Jonifan; Wahyu Supriyatin; Yenniwarti Rafsyam; Teguh Firmansyah; Herudin Herudin; Akoh Herudin
Setrum : Sistem Kendali-Tenaga-elektronika-telekomunikasi-komputer Vol 5, No 2 (2016): Edisi Desember 2016
Publisher : Fakultas Teknik Elektro - Universitas Sultan Ageng Tirtayasa

Radar merupakan sebuah perangkat yang menggunakan gelombang elektromagnetik yang berguna untuk mendeteksi, mengukur jarak, kecepatan dan memetakan objek bergerak maupun diam. Radar maritim adalah stasiun radar bergerak yang dipakai diatas kapal laut sehingga dapat mencakup daerah yang luas di wilayah perairan Indonesia. Radar maritim digunakan untuk mengawasi perairan laut Indonesia. Salah satu subsistem radar maritim adalah antena, Antena berfungsi memancarkan gelombang elektromagnetik ke udara bebas. Untuk menghasilkan coverage area yang luas diperlukan antena dengan gain yang tinggi. Berdasarkan kondisi tersebut maka pada penelitian ini akan diusulkan penggunaan metode patch circular dengan metode array 1x8. Metode patch circular berguna untuk menghasilkan antena yang bekerja pada frekuensi 3,2 GHz. Metode array 1x8 berguna untuk meningkatkan gain antena tanpa merubah fasa dari sinyal. Hasil pengujian menujukkan bahwa semakin banyak elemen banyak, gain semakin tinggi dan memenuhi kriteria yang diharapkan

Ultra-Wideband Microstrip Bandpass Filter and Its Equivalent Circuit Shita Fitria Nurjihan; Yenniwarti Rafsyam
IJITEE (International Journal of Information Technology and Electrical Engineering) Vol 5, No 2 (2021): June 2021
Publisher : Department of Electrical Engineering and Information Technology,Faculty of Engineering UGM

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijitee.65695

Microstrip filters can be designed with various methods to obtain good performances, such as defected ground structure, open-ended slot, planar edge coupled, and split ring resonator with groundplane windowing. In this paper, the design of an ultra-wideband microstrip bandpass filter used the defected ground structure (DGS) method by adding a circular slot to the groundplane. The addition of the circular slot was carried out to improve the value of S parameter (return loss and insertion loss) from the initial filter design without a circular slot. In the simulation process, optimization was carried out by changing the value of filter component parameters such as patch length and thickness and circular slot width. The simulation results showed that the microstrip bandpass filter could pass frequencies in the range of 1.4 GHz to 5.7 GHz with the bandwidth response of 4.3 GHz. In addition, filter analysis could also be done with an equivalent circuit represented by lumped element components in the form of capacitors and inductors connected in series or parallel. The simulation results of the equivalent circuit had a wider bandwidth, which was able to pass frequencies in the range of 1.2 GHz to 6.1 GHz with a bandwidth response of 4.9 GHz.

Perancangan Aplikasi Android Untuk Memonitoring Salinitas dan Suhu Air Aquarium pada Budidaya Ikan Badut Malika Sahnah; Yenniwarti Rafsyam
Spektral Vol. 3 No. 2 (2022): Oktober 2022
Publisher : Politeknik Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32722/spektral.v3i2.5098

Clown fish is a fish that is widely cultivated by farmers in aquariums. In its cultivation, there are several parameters that need to be considered, namely air salinity levels ranging from 29 PPT - 37 PPT and air temperatures ranging from 25°C-30°C. To make it easier to monitor salinity and temperature in the aquarium, the NEMOKU application was created for a monitoring system and remote control of salinity and air temperature through the Android application, which has a control system in the form of an aquarium heater, as well as fresh and salt water pumps. The NEMOKU application has an automatic and manual monitoring system. In the manual system, the fish farmer activates the system through the application, according to the conditions of the aquarium. If the salinity is <29 PPT, the farmer activates the salt water pump, if the salinity value is >37 PPT, activates the fresh water pump and if the temperature is <25°C, activates the aquarium heater. In an automatic system, the system will automatically activate to maintain the salinity and temperature in the aquarium. From the tests carried out, the system that has been designed works well in sending salinity and temperature data as well as remote control. The specifications of the tool used for applications made using Android Studio Version Bumblebee software, laptops with Intel® Core TM i3 2370 M CPU @ 2.8 GHz, 4 GB Memory, 500 GB Harddisk and 14 inches Monitor.

UV LEVEL MONITORING IN ANDROID-BASED SKIN HEALTH SYSTEMS Herlina L, Yeli; Rafsyam, Yenniwarti
Spektral Vol. 5 No. 1 (2024): April 2024
Publisher : Politeknik Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32722/spektral.v5i1.6707

This research proposes a system to monitor the level of UV exposure to android-based skin, using the VEML6075 sensor and ESP32 module. Excessive UV exposure can have a negative impact on skin health such as premature aging and the risk of skin cancer. In this research, ESP32 module is designed and integrated with VEML6075 sensor to measure UV level accurately and send UV level data to android application through internet connection. The android application created allows users to monitor UV exposure levels in various environmental conditions. In addition, the application provides suggestions and alerts based on UV levels, helping users to take appropriate actions in caring for skin health. Tests were conducted on 3 environmental conditions namely indoors, indoors exposed to sunlight and outdoors exposed to direct sunlight. Also testing was carried out at 09.00 WIB to 15.00 WIB with a distance of 30 minutes. The results of the test obtained UV levels from 0.00125 to 5.02324.

PERANCANGAN SISTEM POINTING ANTENA TOWER BTS OTOMATIS UNTUK KOMUNIKASI WI-FI BERBASIS APLIKASI ANDROID: RANCANG BANGUN APLIKASI KONTROL POINTING ANTENA BTS BERBASIS ANDROID Fadhilah, Naufal; Rafsyam, Yenniwarti
Spektral Vol. 5 No. 2 (2024): Oktober 2024
Publisher : Politeknik Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32722/spektral.v5i2.7237

In this digital era, the demand for reliable and efficient communication networks is increasingly rising. One of the critical components in communication networks is the Base Transceiver Station (BTS), which requires an antenna with optimal orientation to ensure maximum signal quality. This research aims to design an automatic BTS antenna pointing system using an Android application. The system utilizes DC Gear Motors and Servo Motors to adjust the antenna's position and orientation in real-time. The Android application serves as an intuitive user interface, allowing technicians to easily calibrate and adjust the antenna. The system is designed to enhance time efficiency and accuracy in the antenna pointing process. The application is developed using Android Studio and Firebase Realtime Database. It is connected to the ESP32 via mobile Wi-Fi internet. The developed application functions effectively, enabling the tower to rotate to the specified angle accurately as commanded by the application. The code and system built significantly assist technicians in the antenna pointing process.

Design and Development of a Transceiver Device with a Power Control and Monitoring Application for Boarding House Tenants based on LoRa RAFSYAM, YENNIWARTI; NIXON, BENNY; PUTRI, KHOMALA ERNIA; ANGELICA, MOLLIYANA TOTA; HASANI, RIFQI FUADI; NURJIHAN, SHITA FITRIA; PRASETYA, IRWAN
ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika Vol 13, No 2: Published April 2025
Publisher : Institut Teknologi Nasional, Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26760/elkomika.v13i2.115

Electricity costs in boarding rooms are often unfairly distributed because each room is charged the same amount, even though electricity usage varies. To solve this problem, a system was created to monitor each room's power usage more efficiently using Long Range (LoRa) technology. This system uses an ESP32 microcontroller, a PZEM-004T sensor, and LoRa, programmed with Arduino IDE. The sensor collects power usage data and sends it to the boarding house owner over the LoRa network, with accuracy close to 99% in three tests. The data is transmitted up to 150 meters with an RSSI of -107 dBm in non-line-of-sight (NONLOS) conditions and up to 600 meters with an RSSI of -111 dBm in line-of-sight (LOS) conditions. It is also connected to an Android app for easier power management and monitoring.

Pemasangan Akses Internet dan Pemanfaatan Antena Mikrostrip Untuk Membantu UMKM di Kampung Setaman, Cipayung, Depok Kurniawati, Nazmia; Nixon, Benny; Rafsyam, Yenniwarti; Danaryani, Sri; Fahmi, Ahdiyat; Raihan, Muhammad
Mitra Akademia: Jurnal Pengabdian Masyarakat Vol 6 No 3 (2023): Mitra Akademia: Jurnal Pengabdian Masyarakat
Publisher : Pusat Penelitian dan Pengabdian kepada Masyarakat (P3M) Politeknik Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32722/mapnj.v6i3.6331

Kampung Setaman, which is located in Kelurahan Ratujaya, is an area where the majority of the people are Micro, Small and Medium Enterprises (MSMEs). Internet access is an important aspect for people to sell their products. In this community service activity, Politeknik Negeri Jakarta (PNJ) Telecommunication Study Group (KBK) carried out internet installation and coverage area expansion using a microstrip antenna. This aims to ensure that people can enjoy internet access in a wide area without requiring the installation of many access points. There are two installation points, namely Posyandu Kartini 2 and Jami Al-Huda Mosque. The microstrip antenna is made in the form of a 1x4 square patch. From the measurement results, by using the created antenna the access point can reach a distance of up to 115 m with Line of Sight (LOS) conditions. As a result of the installation, people can enjoy free internet access in a wide area.

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

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.

Co-Authors Akoh Herudin Alica Dewanti ANGELICA, MOLLIYANA TOTA Annisa Yumna Yudistia Arifuddin, Fikri Benny Nixon Benny Nixon Fadhilah, Naufal Fahmi, Ahdiyat Hasani, Rifqi Fuadi Herlina L, Yeli Herudin Herudin Irwan Prasetya Jonifan Kurniawati, Nazmia Lifwarda Lifwarda Malika Sahnah Milda Yuliza Molliyana Tota Angelica Nida Febiana, Nida Nuhung Suleman Nuhung Suleman Panji Ibrahim N Ibrahim N Prasetya, Irwan Putri, Khomala PUTRI, KHOMALA ERNIA Raihan, Muhammad Rifqi Fuadi Hasani Shita Fitria Nurjihan Sri Danaryani Teguh Firmansyah Wahyu Supriyatin

Title

Found 21 Documents
Search

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Title Search

Found 21 Documents Search

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Title

Found 21 Documents
Search