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All Journal International Journal of Evaluation and Research in Education (IJERE) ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika Lectura : Jurnal Pendidikan AUTOCRACY: Jurnal Otomasi, Kendali, dan Aplikasi Industri Jurnal Pendidikan Vokasional Teknik Elektronika (JVoTE) International Journal of Business, Law, and Education Prosiding Seminar Nasional Pengabdian Kepada Masyarakat Jurnal Pendidikan Teknik dan Vokasional Journal of Global Engineering Research & Science (J-GERS) JOP
Efri Sandi
Universitas Negeri Jakarta
Arts Humanities Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Mechanical Engineering Neuroscience Public Health Social Sciences Transportation Other

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Perancangan dan Optimasi Antena Vivaldi pada Sistem Radar Penembus Permukaan (Ground Penetrating Radar) MARUDDANI, BASO; EFRI SANDI, EFRI SANDI; NAUFAL SALAM, MUHAMMAD FADHIL
ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika Vol 7, No 1 (2019): ELKOMIKA
Publisher : Institut Teknologi Nasional, Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26760/elkomika.v7i1.151

Abstract

ABSTRAKAntena Vivaldi merupakan salah satu jenis antena yang diimplementasikan pada radar penembus permukaan (Ground Penetrating Radar, GPR). GPR adalah salah satu metode non-destructive testing yang biasa digunakan untuk mengetahui kondisi beton/jalan raya. Penelitian ini merancang sebuah antena Vivaldi untuk digunakan pada GPR dengan frekuensi kerja 1 GHz – 2 GHz. Metode yang digunakan untuk merancang dan mengoptimasi antena Vivaldi adalah dengan mengubah beberapa parameter untuk mencapai spesifikasi yang diinginkan. Parameter tersebut antara lain lebar antena, panjang antena dan tapered slot. Optimasi yang dilakukan tetap memperhatikan pola radiasi antena agar tetap terarah. Hasil penelitian ini menghasilkan antena Vivaldi dengan dimensi 350x300 mm dengan return loss di bawah -10 dB pada rentang frekuensi 1 GHz – 2 GHz. Hasil penelitian juga menunjukkan bahwa perubahan nilai parameter lebar antena dan tapered slot menggeser frekuensi kerja antena secara signifikan.Kata kunci: Ground Penetrating Radar, Vivaldi, return loss, parameter antena ABSTRACTThe Vivaldi antenna is one type of antenna that is implemented on Ground Penetrating Radar (GPR). GPR is one of the non-destructive testing methods commonly used to determine the condition of concrete / highway. This studyaim to design a Vivaldi antenna to be used on GPR with a working frequency of 1 GHz - 2 GHz. The method that used to design and optimize Vivaldi antennas is by changing several parameters to achieve the desired specifications. These parameters include antenna width, antenna length and tapered slot. Optimization carried out still observes the radiation pattern of the antenna to keep it directed. The results showed that 350 x 300 mm antennas with return loss below -10 dB in the frequency range of 1 GHz - 2 GHz. The results also show that changes in the parameter width of the antenna and tapered slots shift the antenna working frequency significantly.Keywords: Ground Penetrating Radar, Vivaldi, return loss, antenna parameter
DESAIN U-SLOT GANDA UNTUK MENINGKATKAN BANDWIDTH ANTENA MIMO 5G MILLIMETER-WAVE SANDI, EFRI; DJATMIKO, WISNU; PUTRI, RIZKITA KURNIA
ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika Vol 8, No 1 (2020): ELKOMIKA
Publisher : Institut Teknologi Nasional, Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26760/elkomika.v8i1.150

Abstract

ABSTRAK Pada penelitian ini dikembangkan rekayasa antena mikrostrip (MSA) dengan penambahan U-slot ganda untuk meningkatkan performansi bandwidth antena mikrostrip. Penelitian sebelumnya berfokus pada penambahan U-slot tunggal dan didesain untuk frekuensi di bawah 15 GHz. Kebutuhan utama antena 5G adalah memiliki bandwidth yang lebar dan kemampuan Multiple Input Multiple Output (MIMO). Untuk itu perlu dikembangkan desain antena MIMO 5G dengan bandwidth yang lebih lebar pada frekuensi millimeter-wave 28 GHz sebagai kandidat utama alokasi frekuensi untuk komunikasi seluler 5G. Pada penelitian ini diajukan teknik desain antena MIMO dengan penambahan rekayasa U-slot ganda untuk meningkatkan performansi bandwidth. Hasil kalkulasi dan simulasi menunjukkan bahwa dengan penambahan U-slot ganda, dihasilkan peningkatan performansi bandwith sebesar 68% dibandingkan desain antena tanpa U-slot. Jika dibandingkan dengan hasil penelitian U-slot sebelumnya, penambahan U-slot ganda menghasilkan peningkatan bandwidth sebesar 76%. Kata kunci: U-Slot ganda, antena 5G millimeter-wave, MIMO, bandwidth ABSTRACT In this study, a microstrip antenna (MSA) was developed with the addition of a double U-slot to improve bandwidth performance. Previous studies have focused on adding single U-slots and designed for frequencies below 15 GHz. The main requirement for 5G antennas is high bandwidth performance and multiple inputmultiple output capabilities (MIMO). Therefore, it is necessary to develop a 5G MIMO antenna with broader bandwidth at the millimeter-wave frequency 28 GHz as the primary candidate for frequency allocation for 5G cellular communication. In this study, MIMO antenna design techniques were proposed with the addition of a double U-slot method to improve bandwidth performance. The calculation and simulation results show that with the addition of a double U-slot, an increase in bandwidth performance of 68% compared to antenna designs without U-slots and 76% when compared to using a single U-slot in previous studies. Keywords: Double U-Slot, millimeter-wave 5G antenna, MIMO, bandwidth
Rancang Bangun Sistem Kendali Pintu Garasi Menggunakan Android Berbasis Mikrokontroler Atmega16 Hasrul Baki Hasibuan; Muhammad Fahmi Nurfadilah; Efri Sandi
Autocracy: Jurnal Otomasi, Kendali, dan Aplikasi Industri Vol 2 No 01 (2015): Otomasi, Kendali, dan Aplikasi Industri
Publisher : LPPM Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (349.771 KB) | DOI: 10.21009/autocracy.02.1.4

Abstract

Control System Design of Garage Gate, Using Android Based on Microcontroller ATMEGA16. This study aims to buildautomatic systemof GarageGate,using Bluetooth connection technology,with eksperimen method. Either Hardware and software design or measurementwas done in electrical laboratory, Department of Electrical Engineering, Faculty of Engineering, State University of Jakarta. Preparation and execution of final project had been worked since April 2014 until July 2014. Control system design of garage gate using the Android application was able to open and close the gates using Android application with Bluetooth communication. In the design, Bluetooth communication role has been able to work with a remote control. Remote control worked area is maximum 9 meters, and a distance of 10 meters up, Bluetooth system can no longer respond due to the limited capacity of the Bluetooth module used. Rancang Bangun Sistem Kendali Pintu Garasi Menggunakan Android Berbasis Mikrokontroler ATMEGA16. Penelitian ini menggunakan metode eksperimen dan bertujuan membuat sistem gerbang dan pintu garasi yang dapat bekerja otomatis menggunakan teknologi Bluetooth . Pembuatan perangkat keras, perangkat lunak dan pengujian alat dilakukan di Laboratorium Elektro, Fakultas Teknik Jurusan Teknik Elektro, UNJ. Persiapan dan pembuatan tugas akhir telah dilakukan sejak bulan April 2014 sampai dengan bulan Juli 2014. Sistem pengendalian yang dibuat menggunakan aplikasi Android , dapat menutup dan membuka gerbang dan pintu garasi secara otomatis melalui komunikasi Bluetooth . Fungsi komunikasi Bluetooth menggantikan fungsi remote control. Area kerja dari remote control maksimum 9 meter, sedangkan komunikasi Bluetooth bekerja pada area maksimum 10 meter. Jarak di atas 10 meter tidak dapat mengaktifkan kerja Bluetooth dikarenakan keterbatasan kapasitas dari modul Bluetooth yang digunakan.
DESAIN SISTEM SOLAR CHARGER CONTROLLER UNTUK BATERAI LI-ION PADA MOBIL LISTRIK Rafiuddin Syam; Iqbal Nurpauzi; Vina Oktaviani; Efri Sandi
Prosiding Seminar Nasional Pengabdian Kepada Masyarakat Vol 3 (2022): PROSIDING SEMINAR NASIONAL PENGABDIAN KEPADA MASYARAKAT - SNPPM2022
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Negeri Jakarta

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Abstract

Abstract The objective of the present research is to manufacture a battery charging control system device with a 72-volt photovoltaic power source for Li-Ion batteries in microcontroller-based electric vehicles. In this system, an electric car with a 72V battery using a solar cell as its power source, the electrical energy generated from the solar cell cannot be channeled directly to the battery but requires a device that functions to adjust the electricity from photovoltaic or solar cells so that it can be used in batteries. Namely, the battery charging control system, a device design built using ESP32 as a microcontroller using a mosfet and an inductor to control electricity so that electricity from the solar cell can be received by a 72V battery. Abstrak Tujuan penelitian ini ini untuk merancang dan membuat suatu alat sistem kendali pengisian battery dengan sumber daya photovoltaik 72 volt untuk baterai Li-Ion pada Mobil Listrik Berbasis Mikrokontroller. Pada sistem ini mobil listrik dengan baterai 72V dengan menggunakan solar cell sebagai sumber listriknya, maka energi listrik yang dihasilkan dari solar cell tidak bisa dialirkan langsung ke baterai, tetapi membutuhkan suatu alat yang berfungsi untuk menyesuaikan listrik dari photovoltaic atau solar cell sehingga dapat digunakan pada baterai yaitu Sistem Kendali Pengisian Baterai, rancangan alat yang dibangun menggunakan ESP32 sebagai mikrokontroller dengan menggunakan mosfet dan inductor untuk mengontrol listrik sehingga listrik dari solar cell dapat diterima oleh baterai 72V.
PELATIHAN DIGITAL MARKETING UNTUK MENINGKATKAN KESEJAHTERAAN MASYARAKAT DESA PANTAI SEDERHANA KECAMATAN MUARA GEMBONG KABUPATEN BEKASI Efri Sandi; Jusuf Bintoro; Gilang Fajar Romadan; Muhammad Iqbal
Prosiding Seminar Nasional Pengabdian Kepada Masyarakat Vol 3 (2022): PROSIDING SEMINAR NASIONAL PENGABDIAN KEPADA MASYARAKAT - SNPPM2022
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Negeri Jakarta

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Abstract

Abstract Digital marketing training for fishing village communities is a necessity for community economic development in accordance with the demands of the times and people's lifestyles. Through this digital marketing training, it is hoped that it will contribute to additional expertise for rural communities in marketing various products in the community so as to increase direct marketing access to end users and increase selling power and added value. For this reason, in community service activities funded by the Faculty of Engineering, UNJ, digital marketing training activities were carried out for the community of Pantai Simple Village, Muara Gembong District, Bekasi Regency as a fostered area of the Faculty of Engineering UNJ. The training was held for 2 days in July 2022 to provide basic digital marketing skills and be able to sell products in various market places and websites. The results of the training provide digital marketing skills for the young people of Pantai Simple village who are able to encourage entrepreneurial growth in Pantai Simple village so as to lift the community's economy. Abstrak Pelatihan digital marketing bagi masyrakat desa nelayan merupakan suatu kebutuhan bagi pengembangan ekonomi masyarakat sesuai dengan tuntutan perkembangan zaman dan gaya hidup masyarakat. Melalui pelatihan digital marketing ini diharapkan memberi kontribusi bagi keahlian tambahan bagi masyarakat desa dalam memasarkan berbagai produk di masyarakat sehingga meningkatkan akses pemasaran langsung ke end user dan meningkatkan daya jual dan nilai tambah. Untuk itu dalam kegiatan pengabdian masyarakat yang didanai Fakultas Teknik UNJ dilaksanakan kegiatan pelatihan digital marketing bagi masyarakat desa Pantai Sederhana, Kecamatan Muara Gembong, Kabupaten Bekasi sebagai wilayah binaan Fakultas Teknik UNJ. Pelatihan dilaksanakan selama 2 hari di bulan Juli 2022 untuk memberikan dasar keterampilan digital marketing dan mampu menjual produk di berbagai market place dan website. Hasil pelatihan memberikan keterampilan digital marketing bagi para pemuda dan pemudi desa Pantai Sederhana yang mampu mendorong pertumbuhan wirausaha di desa Pantai Sederhana sehingga mengangkat perekonomian masyarakat.
Goal Oriented Evaluation Using the Delphi Method in Implementing Teaching Factory Multimedia Lisna Nurrohmawati; Yuliatri Sastrawijaya; Efri Sandi
Lectura : Jurnal Pendidikan Vol. 14 No. 2 (2023): Lectura: Jurnal Pendidikan
Publisher : Fakultas Keguruan dan Ilmu Pendidikan (FKIP), Universitas Lancang Kuning

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31849/lectura.v14i2.15085

Abstract

Contextual vocational education makes students able to link the skills acquired with their application in the real world so they will have appropriate competencies. Learning with teaching factory has a focus point, namely the application of competency-based learning patterns supported by production-based learning with link and match between vocational high schools and industry. This research was a mixed method research. This study used the goal oriented program evaluation model with Delphi method to obtain the opinion of experts to determine the standard of assessment that has been used to measure the implementation of teaching factory. The Delphi method used panelist discussions of experts from the multimedia industry and national teaching factory sources. The goal oriented evaluation model was used to measure program achievement based on the objectives of the teaching factory program applied to the Sekolah Menengah Kejuruan (SMK) level. The research was conducted at SMK that hold multimedia expertise competencies in Bogor Regency. The types of research instruments used were observation, interviews, and questionnaires. Validity test with Lawshe technique and reliability test using Chronbach Alpha. The research sample consisted of eleven schools with an average overall result in Bogor Regency was 82.23. Based on these values, it can be concluded that the implementation of the teaching factory in Bogor Regency is well implemented.
Graduate competencies based on the aspect of organizational activity in industry 4.0 Siti Sahara; Vina Oktaviani; Efri Sandi; Vania Zulfa; Rezi Berliana Yasinta; Rika Sa'diyah; Siti Shofiyah; Ilmi Zajuli Ichsan
International Journal of Evaluation and Research in Education (IJERE) Vol 13, No 2: April 2024
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijere.v13i2.25803

Abstract

Industrial revolution 4.0 has an impact, namely the demand for the labor market has changed, where the automation revolution replaces work that is usually capable of being done by humans and poses the risk of termination of employment. The purpose of this study is to identify the competencies that must be possessed by graduates based on aspects of organizational activity according to the needs of the industry. The data in this study are in the form of literacy studies, data from direct interviews with the industry and questionnaires to a number of respondents. Testing the validity of the questionnaire using the product moment correlation formula, followed by reliability testing using the Cronbach alpha. Meanwhile, to determine the sample size in this study using the purposive sampling technique with a total of 75 respondents consisting of practitioners and graduates of the Faculty of Engineering, Universitas Negeri Jakarta (FT-UNJ), Indonesia. The research method is carried out with a qualitative descriptive method which is intended to obtain results that describe in detail the competencies that must be possessed by graduates based on aspects of organizational activity according to the needs of the industry. The results of the research related to the competence of graduates needed by industry 4.0 based on aspects of organizational activity, namely open minded, decision making abilities, emotional intelligence, cognitive flexibility, service orientation, coordinating with others, leadership skills, critical thinking and creativity skills, skills in technology, and complex problem solving.
DEVELOPMENT OF A 5.8 GHz MICROSTRIP TEXTILE ANTENNA BASED ON CORDURA D1682 LAYER SUBSTRATE Fajar Dwi Artikah; Efri Sandi; Vina Oktaviani
JURNAL PENDIDIKAN VOKASIONAL TEKNIK ELEKTRONIKA (JVoTE) Vol. 7 No. 1 (24): Vol 7 No 1 (2024): JURNAL PENDIDIKAN VOKASIONAL TEKNIK ELEKTRONIKA (JVoTE) Volume
Publisher : PENDIDIKAN VOKASIONAL TEKNIK ELEKTRONIKA FAKULTAS TEKNIK UNIVERSITAS NEGERI JAKARTA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/jvote.v7i1.49212

Abstract

This study aims to develop a textile microstrip antenna at a frequency of 5.8 GHz with a layered Cordura D1682 fabric substrate designed to improve the bandwidth performance and characteristics of the antenna. The antenna design is carried out by adding slots to a rectangular patch and optimizing the supply using the inset feed method. This study uses a Research and Development (R&D) approach with simulation and fabrication stages. The antenna substrate made of Cordura with a thickness of 0.55 mm is stacked into three layers so that it has a dielectric constant of 1.9. The results of on-body simulation conditions show a bandwidth of 377 MHz with a VSWR of 1.307, a gain of 7.15 dB, and a SAR value of 0.022 W/kg when attached to the arm, with a unidirectional radiation pattern. Meanwhile, the results of on-body measurements after fabrication produce a bandwidth of 154 MHz with a VSWR of 1.397. These findings indicate that the addition of slots and inset feeds to microstrip textile antennas can improve antenna performance and have the potential to be applied to wearable-based wireless communication systems.
PENGARUH PENGGUNAAN COMPLEMENTARY SPLIT RING RESONATOR (CSRR) DAN U-SLOT DENGAN PENCATUAN PROXIMITY COUPLING PADA ANTENA MIKROSTRIP TRIANGULAR Silvie Annisa, Maudy; Sandi, Efri; Diamah, Aodah
JURNAL PENDIDIKAN VOKASIONAL TEKNIK ELEKTRONIKA (JVoTE) Vol. 7 No. 1 (24): Vol 7 No 1 (2024): JURNAL PENDIDIKAN VOKASIONAL TEKNIK ELEKTRONIKA (JVoTE) Volume
Publisher : PENDIDIKAN VOKASIONAL TEKNIK ELEKTRONIKA FAKULTAS TEKNIK UNIVERSITAS NEGERI JAKARTA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/jvote.v7i1.49361

Abstract

Microstrip antenna is one of the important components in weather radar system, especially in X-band frequency, which requires high performance in terms of gain and bandwidth. This study analyzes the effect of triangular Complementary Split Ring Resonator (CSRR) and U-slot techniques with proximity coupling feeding on the performance of triangular microstrip antenna. The material used is Rogers RT5880 with a dielectric constant of 2.2. The simulation results show that the conventional antenna produces a VSWR value of 1.374, a return loss of -16.039 dB, a bandwidth of 78.707 MHz, and a gain of 10.12 dB. Meanwhile, the antenna modified with CSRR and U-slot and proximity coupling feeding shows improved performance with a VSWR value of 1.495, a return loss of -14.048 dB, a bandwidth of 160.596 MHz, and a gain of 12.09 dB. The addition of a CSRR structure to the groundplane, as well as a U-slot and inset feed to the patch, has proven effective in increasing antenna gain and bandwidth. Therefore, this technique has potential application in weather radar systems to improve signal transmission efficiency and quality.
Perancangan dan Optimasi Antena Vivaldi pada Sistem Radar Penembus Permukaan (Ground Penetrating Radar) MARUDDANI, BASO; SANDI, EFRI; NAUFAL SALAM, MUHAMMAD FADHIL
ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika Vol 7, No 1: Published January 2019
Publisher : Institut Teknologi Nasional, Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26760/elkomika.v7i1.151

Abstract

ABSTRAKAntena Vivaldi merupakan salah satu jenis antena yang diimplementasikan pada radar penembus permukaan (Ground Penetrating Radar, GPR). GPR adalah salah satu metode non-destructive testing yang biasa digunakan untuk mengetahui kondisi beton/jalan raya. Penelitian ini merancang sebuah antena Vivaldi untuk digunakan pada GPR dengan frekuensi kerja 1 GHz – 2 GHz. Metode yang digunakan untuk merancang dan mengoptimasi antena Vivaldi adalah dengan mengubah beberapa parameter untuk mencapai spesifikasi yang diinginkan. Parameter tersebut antara lain lebar antena, panjang antena dan tapered slot. Optimasi yang dilakukan tetap memperhatikan pola radiasi antena agar tetap terarah. Hasil penelitian ini menghasilkan antena Vivaldi dengan dimensi 350x300 mm dengan return loss di bawah -10 dB pada rentang frekuensi 1 GHz – 2 GHz. Hasil penelitian juga menunjukkan bahwa perubahan nilai parameter lebar antena dan tapered slot menggeser frekuensi kerja antena secara signifikan.Kata kunci: Ground Penetrating Radar, Vivaldi, return loss, parameter antena ABSTRACTThe Vivaldi antenna is one type of antenna that is implemented on Ground Penetrating Radar (GPR). GPR is one of the non-destructive testing methods commonly used to determine the condition of concrete / highway. This studyaim to design a Vivaldi antenna to be used on GPR with a working frequency of 1 GHz - 2 GHz. The method that used to design and optimize Vivaldi antennas is by changing several parameters to achieve the desired specifications. These parameters include antenna width, antenna length and tapered slot. Optimization carried out still observes the radiation pattern of the antenna to keep it directed. The results showed that 350 x 300 mm antennas with return loss below -10 dB in the frequency range of 1 GHz - 2 GHz. The results also show that changes in the parameter width of the antenna and tapered slots shift the antenna working frequency significantly.Keywords: Ground Penetrating Radar, Vivaldi, return loss, antenna parameter
Co-Authors Agung Pangestu Akbar, Anshari Arifin, Maulana Ali Ayudyah Khusuma Wardani Baso Maruddani Cahyo Purnomo, Dandy Diamah, Aodah Djatmiko, Wisnu Fajar Dwi Artikah Gilang Fajar Romadan Hasrul Baki Hasibuan Hijriani, Endah Ilmi Zajuli Ichsan Iqbal Nurpauzi Jusuf Bintoro Lisna Nurrohmawati Muhammad Fahmi Nurfadilah Muhammad Iqbal Muhammad Yusro NAUFAL SALAM, MUHAMMAD FADHIL NAUFAL SALAM, MUHAMMAD FADHIL Neneng Siti Silfi Ambarwati Nurrohmawati, Lisna Pebriani, Melia Putri PUTRI, RIZKITA KURNIA Rafiuddin Syam Ramadhan, Rio Rezi Berliana Yasinta Rika Sa'diyah Rohana, Assa Kesthy Rosyid Ridlo Al-Hakim SANTOSO, ARDI IMAM Silvie Annisa, Maudy Siti Sahara Siti Shofiyah Vania Zulfa Vina Oktaviani Vina Oktaviani Yolanda, Sara Yuliatri Sastrawijaya Yuliatri Sastrawijaya, Yuliatri