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All Journal JURNAL EDUCATION AND DEVELOPMENT Jambura Journal of Electrical and Electronics Engineering INAJEEE (Indonesian Journal of Electrical and Electronics Engineering) Jurnal Teknik Elektro (JTE)
Nurhayati Nurhayati
Universitas Negeri Surabaya
Agriculture, Biological Sciences & Forestry Arts Humanities Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Education Electrical & Electronics Engineering Energy Engineering Languange, Linguistic, Communication & Media

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Circular Polarization of the Square, Circular, Triangle, and Hexagonal Microstrip Antenna Nurhayati Nurhayati; Paulen Aulia Lutfia; Raimundo Eider Figueredo Sobrinho; Alexandre Manicoba de Oliveira; João Francisco Justo Filho; Takeshi Fukusako
INAJEEE (Indonesian Journal of Electrical and Electronics Engineering) Vol. 3 No. 1 (2020)
Publisher : Department of Electrical Engineering, Faculty of Engineering, Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/inajeee.v3n1.p5-9

Abstract

Microstrip antenna with circular polarization can be applied for many applications. Some microstrip antenna with square, circular, triangular, and hexagonal shape has been designed to get return loss, axial ratio, and radiation performance. We compare twelve microstrip antenna by maintaining its substrate dimension, feeding shape, and outer patch dimension. Even though antenna has a circular patch, it doesnt always produce circular polarization. From the simulation, we found that with add some structure, the antenna can reach multiband resonance from 1 to 6 GHz. The Circular patch antenna reached seven numbers of the multiband resonance frequency. The hexagonal patch antenna reaches the highest directivity as 9.53 dBi. The circular polarization is achieved for a square and Hexagonal patch shape with axial ratio value is 1.96 dB at 4 GHz and  1.26 dB at 4.1 GHz sequentially at phi 900 and theta 900. 
Vivaldi Antipodal Antenna with High Gain and Reduced Side Lobe Level Using Slot Edge with New Neogothic Fractal by Cantor with Application in Medical Images for Tumor Detection Raimundo Eider Figueredo Sobrinho; Alexandre Manicoba de Oliveira; Antonio Mendes De oliveira Neto; Alexandre Jean Rene Serres; Auzuir R De Alexandria; João Francisco Justo Filho; Marcelo B. Perotoni; Nurhayati Nurhayati; Ingrid C. Nogueira
INAJEEE (Indonesian Journal of Electrical and Electronics Engineering) Vol. 3 No. 1 (2020)
Publisher : Department of Electrical Engineering, Faculty of Engineering, Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/inajeee.v3n1.p25-31

Abstract

This article addresses the study of the Vivaldi Antipodal Antenna (AVA) seeking to improve the gain, decrease the Side Lobe Level (SLL) and the squint, to make the antenna more directive and obtain a more stable radiation pattern. Its intended application lies in the generation of biological microwave imaging to detect brain tumors. With this objective, the Fractal Slot Edge (FSE) technique was applied with a new fractal developed and based on the Cantor set. The application of this fractal, called Cantor Neogothic Fractal (CNG), formed different-sized cavities resulting, in this work, in three antennas that were analyzed through numerical computational simulation together with AVA. The antennas, called CNG9-FSE-AVA, CNG18-FSE-AVA, and CNG27-FSE-AVA, in which 9, 18, and 27 define the maximum height that the fractal reached in each antenna, have areas equal to 354.66 mm2 , 709.33 mm2 and 1064 mm2 , respectively. All antennas achieved the goal, however, CNG27-FSE-AVA presented the best results at 2 GHz, with a gain of 7.84 dBi, SLL -19.80 dB, and squint of -0.10 degree. Additionally, it was proved that the antenna is suitable to generate a near field microwave imaging of tumors in a brain model.
Literature Study of Harvesting Energy with Resources Radio Frequency Moch Khafid Mukminin; Nurhayati Nurhayati
INAJEEE (Indonesian Journal of Electrical and Electronics Engineering) Vol. 3 No. 2 (2020)
Publisher : Department of Electrical Engineering, Faculty of Engineering, Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/inajeee.v3n2.p48-55

Abstract

Energy harvesting is the process of harvesting energy from external sources such as solar energy, heat, wind and electromagnetic waves / radio frequencies. dimension. Research on harvesting energy needs to be developed because the use of non-renewable energy is increasingly limited. The use of radio frequency (RF) as a source of energy for harvesting is an effort to create environmentally friendly energy. This is due to the growing use of telecommunications technology. Various studies have been conducted by harvesting RF from various telecommunication signals and broadcasting media (AM / FM, TV / DTV, GSM signals, Wi-Fi signals). The purpose of writing this article is to study literature on the use of harvesting energy, especially those originating from radio / RF frequencies. A simple harvesting energy harvesting system consists of an antenna and a voltage rectifier circuit. The antennas used for RF energy harvesting have different designs according to the type of signal captured, including using periodic log antennas, archimedean spiral antennas, patch antennas, dipole patch antennas and vivaldi antennas. The energy yield obtained from the energy harvesting process with radio frequency sources tends to be small in the milliwatt scale (1.17 µW / cm2 - 20VDC) depending on the type of antenna and radio frequency used (0.3 - 27.5 GHz) and can be applied to low power electronic devices.
Study Comparative of Antenna for Microwave Imaging Applications Rachmat Agus Kurdyanto; Nurhayati Nurhayati; Puput Wanarti Rusimamto; Farid Baskoro
INAJEEE (Indonesian Journal of Electrical and Electronics Engineering) Vol. 3 No. 2 (2020)
Publisher : Department of Electrical Engineering, Faculty of Engineering, Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/inajeee.v3n2.p41-47

Abstract

AbstractMicrowave can be applied for telecommunicaions, radar and microwave imaging. This wave has been widely used in everyday life, such as in the industrial word in the fields of robotics, microwave vision, imaging burrier objects, vehicular guidance, biomedical imaging, remote sensing, wheater radar, target tracking, and other apllications. Microwave imaging is a technology that uses electromagnetic waves at frequencies from Megahertz to Gigahertz. Utilization of microwave imaging in addition to information technology and telecommunications, this wave application can be used to process an image because of its ability to penetrate dielectric materials. The purpose of writing this article is to determine microwave imaging application, the working principle of antennas used for microwave imaging applications and antenna specifications used for microwave imaging applications. Microwave imaging research has been carried out using several different type of antennas such as vivaldi and monopole antennas. Where the signal tha is transmitted and will be exposed to the object will send a different return signal so that an image of an object will be obtained which will be processed on the computer. The working frequency of the antenna for microwave imaging applications is in a wide frequency range (UWB antenna). The antennas that are applied include the vivaldi antenna which works at a frequency of 1-11 GHz and a monopole antenna that works at a frequency 1,25-2,4 GHz for biomedical imaging applications, while for radar applications in the construction field it can use a frequency of 0,5-40 GHz.
Application of Information Retrieval Room in Building A8 Faculty of Engineering Surabaya State University Web-Based and Virtual Reality Fatkul Ikrom Ariszki; Nurhayati Nurhayati
INAJEEE (Indonesian Journal of Electrical and Electronics Engineering) Vol. 3 No. 2 (2020)
Publisher : Department of Electrical Engineering, Faculty of Engineering, Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/inajeee.v3n2.p32-40

Abstract

Technology plays an important role in human life today, the ease of accessing the internet makes information technology a tool to help humans in their daily lives, one of which is a tool that can find new locations. The high use of search engines makes search engines the choice that is often used in finding information. This research was conducted to implement the Information Retrieval system to find rooms in the Engineering Faculty, Surabaya State University. The system will perform keyword indexing (query) to documents that are already stored in the MySQL database. This IR system is loaded on a Web page, equipped with general information about the room, the room's location point (Maps), and a Virtual Reality display that can provide users with a room browsing experience. The results of the study were a room search system website equipped with VR which was rated well by users with an average rating of 78%. From the results of this research, the IR web system is suitable for use as a medium to provide information and instructions for rooms in building A8, Faculty of Engineering, State University of Surabaya. In the management of information media, it is necessary to improve the quality of information and services, to support the needs of users so that information technology media can be used by users who are not familiar with the Surabaya State University environment.
Umbrella Monopole Antenna for 5G Applications Paulen Aulia Lutfia; Nurhayati Nurhayati; Samuel Prasad Jones Christydass
INAJEEE (Indonesian Journal of Electrical and Electronics Engineering) Vol. 4 No. 1 (2021)
Publisher : Department of Electrical Engineering, Faculty of Engineering, Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/inajeee.v4n1.p8-11

Abstract

Umbrella Monopole Antenna (UMA) proposed in this paper for 5G application. We designed four models of UMA, i.e: UMA-A, UMA-B, UMA-C, and UMA-D. The antenna has a curvature in the patch as an umbrella shape with a feeding shape a microstrip feed line. Four variations of the patch antenna have been designed and get different performance in VSWR, surface current, and directivity. The proposed antenna has a wide bandwidth that operates 8 GHz 30 GHz with VSWR <2 dB. The Increasing of directivity is reached for UMA-A, UMA-C, UMA-D, and UMA-B, i.e: 6.38 dBi, 7.97 dBi, 8,84dBi, and 9,15 dBi respectively at 24 GHz.  The maximum gain has been reached for UMA-B of 9.15. The lowest frequency that has a return loss of 10 dB has resulted for UMA-D in the frequency around 5 GHz. All of the UMA antennas can be applied for 5G mmwave applications at 24 GHz and 28 GHz.
Improvement of Coplanar Vivaldi Antenna Radiation Patterns with Fractal Structure for Ultra-Wideband Applications Rizqi Agustini; Nurhayati Nurhayati
INAJEEE (Indonesian Journal of Electrical and Electronics Engineering) Vol. 4 No. 2 (2021)
Publisher : Department of Electrical Engineering, Faculty of Engineering, Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/inajeee.v4n2.p44-50

Abstract

The need for telecommunications technology requires fast data transfer and increasing capacity. Therefore, telecommunications technology continues to be developed by creating transmitter and receiver devices that can work at Ultra-Wideband (UWB) frequencies. This study aims to design a coplanar Vivaldi antenna with a fractal structure so that the performance of the antenna radiation pattern can increase to apply UWB frequency. The conventional coplanar Vivaldi antenna, model-A, and Model-B fractal antennas are designed to see the performance of return loss values less than -10 dB, VSWR less than 2, and working frequency of 2-10 GHz. The fractal model is created with a circular repeating structure given at the edges of the antenna patch. From the simulation results, the main lobe value of the conventional Coplanar Vivaldi antenna was 5.21 dBi, the model-A fractal was 7.02 dBi, and the Model-B fractal was 7.84 dBi. The order of the best sidelobe performance at a frequency of 6 GHz is obtained for the model-A fractal of -9 dB. Beamwidth of 46 degrees and the best main lobe direction of 0 degrees is obtained for fractal model-B. By adding a fractal structure, the lobe magnitude/directivity, sidelobe level, beamwidth, and main lobe direction can be improved
Sistem Monitoring Kualitas Air Pada Sistem Akuaponik Berbasis IoT Arif Widodo; Risma Alfia; Nurhayati Nurhayati; Nur Kholis
JURNAL TEKNIK ELEKTRO Vol 10 No 3 (2021): SEPTEMBER 2021
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jte.v10n3.p707-714

Abstract

Sistem akuaponik bertujuan untuk menghemat lahan tanam sekaligus membentuk pengairan yang terhubung secara langsung sehingga membentuk kehidupan dalam simbiosis mutualisme antara tanaman dan ekosistem air. Oleh karena itu, kualitas air pada sistem akuaponik harus terjaga. Tujuan penelitian ini adalah untuk memonitor kualitas air yang ada pada sistem akuaponik yang meliputi empat parameter, antara lain suhu air, pH air, Total Padatan Terlarut (TDS), dan tingkat kekeruhan air untuk dapat ditampilkan pada Web Server dan aplikasi Telegram. Melalui teknologi IoT, maka monitoring akan lebih mudah dilakukan karena pengamatan tidak perlu dilakukan secara langsung. Parameter tersebut akan ditampilkan pada Web Server dan aplikasi Telegram yang telah terhubung oleh sistem IoT pada prototipe sistem monitoring akuaponik. Metode penelitian yang digunakan adalah metode pendekatan kuantitatif dengan instrumen pengumpulan data yang diperoleh dari dari software VNC Viewer dan mikrokontroler Raspberry 3 Model B. Komponen lain yang digunakan untuk mengukur parameter yang diperlukan antara lain, DS18B20, PH-4502C, SEN0244, SEN0189, dan Arduino Pro Mini. Hasil penelitian menunjukkan bahwa prototipe mampu mengukur parameter pada kualitas air dan dapat mengirimkan data ke Web Server maupun aplikasi Telegram dengan nilai akurasi pada suhu air sebesar 98,63%; pH air sebesar 98,36%; dan Total Padatan Terlarut (TDS) sebesar 99,70%. Untuk tingkat kekeruhan air tidak memiliki nilai akurasi disebabkan oleh tidak adanya alat pembanding pada penelitian ini. Kata Kunci: Akuaponik, Web Server, IoT, Telegram, VNC Viewer
Quality of Service (QoS) Comparative Analysis of Wireless Network Akbar Kurnia Saleh; Hapsari Peni Agustin Tjahyaningtijas; Nurhayati Nurhayati; Lusia Rakhmawati
INAJEEE (Indonesian Journal of Electrical and Electronics Engineering) Vol. 5 No. 2 (2022)
Publisher : Department of Electrical Engineering, Faculty of Engineering, Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/inajeee.v5n2.p30-37

Abstract

Nowadays the education sector has changed due to the covid-19 pandemic, but the government has tried to reduce this impact by providing WiFi in some areas. This article seeks to compare the quality of the internet network in an area that offers WiFi to the surrounding population, particularly students as a support for DL (Distance Learning), simulation, and the ideal scenario. In order to determine the quality of a network, one needs to consider the QoS (Quality of Service) metrics, which include packet loss, throughput, latency, and jitter. Using Wireshark (network analyzer software), this research collects data on the item to be investigated; the obtained data will be analyzed to determine the QoS of the WiFi service under investigation. In addition, this research will do network modeling and simulation using the opnet modeler (network simulation software), which will be utilized to compare the observed items. While video conferencing was used to analyze latency and jitter during a 60-minute sample length assessment, 500 MB of data was used to evaluate throughput and packet loss. Keywords: Quality of Service, packet loss, throughput, delay, jitter
Optimasi Kinerja Antena Mikrostrip Dengan Modifikasi Patch dan Ground Plane Untuk Aplikasi Ultra-wideband (UWB) Andri Arfianto; Nurhayati Nurhayati; Lilik Anifah; I Gusti Putu Asto Buditjahjanto
JURNAL TEKNIK ELEKTRO Vol 11 No 1 (2022): JANUARI 2022
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jte.v11n1.p155-162

Abstract

Dalam dunia teknologi telekomunikasi, khususnya antena Ultra-wideband (UWB) telah banyak digunakan untuk aplikasi telekomunikasi radio dan radar. Antena mikrostrip UWB memiliki beberapa keunggulan diantaranya memiliki dimensi relatif kecil, daya pancar yang rendah, dan mudah difabrikasi. Tujuan dari penulisan artikel ini adalah untuk mengetahui optimasi kinerja antena mikrostrip dengan modifikasi patch dan ground plane untuk aplikasi UWB. Metode yang digunakan adalah dengan menggunakan komputasi elektromagnetik. Berdasarkan penelitian yang dilakukan, dengan desain patch berbentuk persegi panjang dengan potongan segitiga dan slot berbentuk L pada ground plane, sehingga didapatkan antena yang mampu bekerja pada frekuensi UWB. Antena mikrostrip UWB ini memiliki dimensi 28 mm x 32 mm x 1,6 mm dengan fabrikasi menggunakan bahan substrat FR-4 dengan konstanta dielektrik (εr) = 4.3. Hasil simulasi antena mikrostrip UWB dengan potongan segitiga dan L-slot pada ground plane menunjukkan bahwa antena tersebut dapat bekerja pada frekuensi UWB dari 2,83 GHz hingga 10,92 GHz. Nilai gain tertinggi dihasilkan pada frekuensi 9 GHz sebesar 4,29 dBi dengan polarisasi elips dengan jenis pola radiasi omnidirectional.Kata Kunci : Antena, UWB, Mikrostrip, Parsial Ground, Slot berbentuk L
Co-Authors Agusniar Dian Safitri Akbar Kurnia Saleh Alexandre Jean Rene Serres Alexandre Manicoba de Oliveira Alexandre Manicoba de Oliveira Andri Arfianto Antonio Mendes De oliveira Neto Arif Widodo Auzuir R De Alexandria Deni Wijayanto Endryansyah Endryansyah Farid Baskoro Fatkul Ikrom Ariszki Hapsari Peni Agustin Tjahyaningtijas Hapsari Peni Agustin Tjhayaningtijas Harisone Gusti Arief Prahara I Gusti Putu Asto Buditjahjanto Ingrid C. Nogueira João Francisco Justo Filho João Francisco Justo Filho Lilik Anifah Lusia Rakhmawati Marcelo B. Perotoni Mintowati Mintowati Moch Khafid Mukminin Mochamad Jauhar Nur Ainul Sirojuddin Muhammad Anas Noval Muhammad Syariffuddien Zuhrie Mumtazusysyifa Maimunah Nur Holis Nur Kholis Paulen Aulia Lutfia Puput Wanarti Rusimamto Rachmat Agus Kurdyanto Raden Roro Hapsari Peni Agustin Raimundo Eider Figueredo Sobrinho Raimundo Eider Figueredo Sobrinho Ramadhani Arie Sadewa Setiyanto Risma Alfia Rizqi Agustini Samuel Prasad Jones Christydass Subuh Isnur Haryudo Takeshi Fukusako Tri Wrahatnolo