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All Journal Jurnal INKOM Bulletin of Electrical Engineering and Informatics Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Jurnal Elektronika dan Telekomunikasi
Teguh Praludi
Indonesian Institute of Science
Computer Science & IT Electrical & Electronics Engineering Engineering

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Binary Template Matching for Morphological Dilation Enhancement in Navigation Radar Imaging Heriana, Octa; Praludi, Teguh; Wael, Chaeriah Bin Ali
Jurnal Elektronika dan Telekomunikasi Vol 18, No 2 (2018)
Publisher : Indonesian Institute of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/jet.v18.60-66

Abstract

Radar imaging system is strongly influenced by other supporting systems. There is a motor system that provides angular information to the display system, and Digital Signal Processing (DSP) system that provides the main information for radar imaging. The new approach, we substitute a DC servo motor with a DC stepper motor as radar antenna rotator in our navigation radar system development. Different from the use of servo motors that can provide angle movements smoothly, the new motor system provides angle information of 0.56 degrees in every step, results in empty pixel gaps in every 0.56 degrees in radar Plan Position Indicator (PPI) image. The width of the empty pixel gaps becomes wider when the cell array of raw data is increasing regarding the image plotting process. In this paper, we proposed a new morphological dilation method to the radar raw data based on binary template matching to accommodate the various width of empty pixel gaps before the radar raw data are plotted into the radar PPI image. By this method, the morphological dilation will only be applied to the raw data that meet the same criteria as the binary template. Otherwise, the raw data will be left as they are. The result shows that there is 150.52% pixel data addition in the empty pixel gaps from the original image, and 48.44% increase of the morphological dilation without binary template matching method. 
Desain dan Realisasi Filter Bandpass Mikrostrip Dengan Struktur Hairpin Praludi, Teguh; Sulaeman, Yaya
Jurnal Elektronika dan Telekomunikasi Vol 13, No 1 (2013)
Publisher : Indonesian Institute of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (922.626 KB) | DOI: 10.14203/jet.v13.33-37

Abstract

Kebutuhan akan sebuah filter dalam sebuah rangkaian elektronik mutlak diperlukan, dikarenakan sesuai dengan fungsi filter adalah meloloskan frekuensi yang diinginkan dan akan menahan frekuensi yang tidak diinginkan. Desain dan realisasi filter bandpass menggunakan teknologi mikrostrip dengan struktur hairpin akan dipaparkan pada makalah ini. Strukur hairpin merupakan perbaikan dari filter yang menggunakan parallel coupled bila ditinjau dari sisi dimensi sebuah filter, di mana pada struktur hairpin ini, panjang dari stripline akan dilipat membentuk huruf U sebesar ½ λ dengan sudut lekukan 90o. Filter bandpass struktur hairpin dengan teknologi mikrostrip akan didesain dengan insertion loss ≤ -3 dB pada daerah passband, return loss ≥ -20 dB, lebar bandwidth 200 MHz, impedansi karakteristik 50 Ω, frekuensi kerja 2,9–3,1 GHz dengan respon filter Chebyshev 0,1 dB. Filter bandpass yang didesain menggunakan bahan dari roger RO4350 yang mempunyai ketebalan 1,44 mm, dan permitivitas relatif (εr) = 3,77. Filter bandpass struktur hairpin ini dirancang dan disimulasikan dengan menggunakan perangkat lunak ADS (Advanced Design System) dari Agilent.
Infinite Latent Feature Selection Technique for Hyperspectral Image Classification Miftahushudur, Tajul; Ali Wael, Chaeriah Bin; Praludi, Teguh
Jurnal Elektronika dan Telekomunikasi Vol 19, No 1 (2019)
Publisher : Indonesian Institute of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/jet.v19.32-37

Abstract

The classification process is one of the most crucial processes in hyperspectral imaging. One of the limitations in classification process using machine learning technique is its complexities, where hyperspectral image format has a thousand band that can be used as a feature for learning purpose. This paper presents a comparison between two feature selection technique based on probability approach that not only can tackle the problem, but also improve accuracy. Infinite Latent Feature Selection (ILFS) and Relief Techniques are implemented in a hyperspectral image to select the most important feature or band before applied in Support Vector Machine (SVM). The result showed ILFS technique can improve classification accuracy better than Relief (92.21% vs. 88.10%). However, Relief can extract less feature to reach its best accuracy with only 6 features compared with ILFS with 9.
Pengendali Kecepatan Motor Induksi 3-Phase pada Aplikasi Industri Plastik Hardiati, Sri; Oktafiani, Folin; Pristianto, Joni; Praludi, Teguh; Wijayanto, Yusuf Nur
INKOM Journal Vol 3, No 1-2 (2009)
Publisher : Pusat Penelitian Informatika - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (51.584 KB) | DOI: 10.14203/j.inkom.36

Abstract

A circuit for speed controlling of three phase motor induction was designed and implemented. The circuit is using triac as main of component and supported by diac, diode, and the other passive electronics component. The result is a prototype of the speed controlling circuit. The circuit was implemented in plastic industry for keeping of the plastic yarn, so we can optimize production process and increasing the result as better quality and efficient. Keywords: control, speed , triac, motor induction
Non-Invasive Wristwatch Microstrip Antenna Sebagai Pengukur Kadar Gula Dalam Darah Pada ISM (Industrial,Science,and Medical) Band Nugraha, Wahid Nova; Rahayu, Yusnita; Praludi, Teguh
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 8 (2021): Edisi 2 Juli s/d Desember 2021
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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

Abstract

Diabetes mellitus affects millions of people worldwide. At present, the technology used by people with diabetes for determining blood glucose concentration is an invasive method that requires a blood sample and is thus painful. Bloodless and painless technology to monitor blood glycaemic levels could improve the lives of diabetes patients. This paper presents the design of a Mikrostrip antenna which can be used for non-invasive blood glucose monitoring. The antenna works well atfrequency of 2.46 GHz. This frequency shift can be used to observe the change in blood's concentration, which will be used to estimate the concentration of glucose in the blood.Keywords: Mikrostrip Antenna, Return Loss, Non Invasive Method,Glucose Monitoring, ISM Band
Analysis of unmanned aerial vehicle airframe materials on circularly polarized antenna radiation characteristics Wahyudi, Wahyudi; Setyadewi, Imas Tri; Sakti, Mohammad Amanta Kumala; Prabowo, Yanuar; Hadiyanti, Donatina Miswati; Rahayu, Novelita; Muzayadah, Nurul Lailatul; Wahyudi, Agus Hendra; Guno, Yomi; Praludi, Teguh; Santosa, Cahya Edi; Sumantyo, Josaphat Tetuko Sri
Bulletin of Electrical Engineering and Informatics Vol 14, No 4: August 2025
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/eei.v14i4.8010

Abstract

This paper presents an experimental examination of how unmanned aerial vehicle (UAV) airframe materials affect the electromagnetic characteristics of the airborne circularly polarized (CP) payload antenna. This study specifically investigates the received signal from the circularly polarized synthetic aperture radar (CP-SAR) antenna installed within the fuselage of the lapan surveillance UAV (LSU). In the airborne CP-SAR experiment, broadband CP microstrip subarray antennas were used along with LSU series airframe material composites comprising E-glass EW-185 and Carbon C522 Twill. The composite specimens were prepared to have the same size and thickness to minimize variability in the comparative analysis. The experimental study measures the transmission loss using S-parameters. At 5.3 GHz, the E-glass EW-185 fiber composite exhibits a material attenuation of -1.5 dB and a circular depolarization of 0.32 dB. The E-glass EW-185 fiber composite exhibits a material attenuation of -1.5 dB and a circular depolarization of 0.32 dB. In contrast, the Carbon C522 Twill fiber composite demonstrates a significantly higher material attenuation of -31.24 dB and a circular depolarization of 10.70 dB. Additionally, this paper examines the radiation pattern measurements of the CP-SAR antenna at various frequencies, providing a comprehensive analysis of the materials' impact on antenna performance.
Co-Authors Chaeriah Bin Ali Wael, Chaeriah Bin Folin Oktafiani, Folin Guno, Yomi Hadiyanti, Donatina Miswati Hardiati, Sri Heriana, Octa Josaphat Tetuko Sri Sumantyo, Josaphat Tetuko Sri Miftahushudur, Tajul Muzayadah, Nurul Lailatul Nugraha, Wahid Nova Prabowo, Yanuar Pristianto, Joni Rahayu, Novelita Sakti, Mohammad Amanta Kumala Santosa, Cahya Edi Setyadewi, Imas Tri Sulaeman, Yaya Wael, Chaeriah Bin Ali Wahyudi Wahyudi Wahyudi, Agus Hendra Yusnita Rahayu Yusuf Nur Wijayanto, Yusuf Nur