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All Journal ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika JMECS (Journal of Measurements, Electronics, Communications, and Systems) Electrician : Jurnal Rekayasa dan Teknologi Elektro
Saputra, Efa Maydhona
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Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Engineering Materials Science & Nanotechnology

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Rancang Bangun Band Pass Filter Frekuensi 1.27 GHz untuk Teknologi Synthetic Aperture Radar FITRIANTO, RIFAN; ROHMAH, YUYUN SITI; SAPUTRA, EFA MAYDHONA
ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika Vol 5, No 2: Published July - December 2017
Publisher : Institut Teknologi Nasional, Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26760/elkomika.v5i2.149

Abstract

ABSTRAKSynthetic Apertur Radar (SAR) adalah teknologi radar yang digunakan untuk pengambilan gambar suatu objek dalam bentuk 2 atau 3 dimensi (penginderaan jarak jauh). Sistem tersebut  bekerja pada rentang frekuensi 1.265 sampai dengan 1.275 GHZ dengan frekuensi tengahnya 1.27 GHz. Agar sistem SAR ini dapat bekerja dengan optimal, dibutuhkan suatu perangkat filter yang dapat meloloskan frekuensi yang diinginkan. Sebelumnya sudah ada penelitian yang membuat perangkat ini di band frekuensi yang sama namun menggunakan bahan duroid 5880 dan resonator berbentuk kotak. Bandpass filter Pada penelitian ini dirancang dengan menggunakan metode Hairpin line dan bahan epoxy FR4. Hasil pengukuran menunjukkan nilai Return Loss masih cukup besar yaitu -9.33 dB dan nilai Insertion Loss minimal sebesar -13.51 dB.Kata kunci: Syntethic Aperture Radar, Band Pass Filter, Hairpin-lineABSTRACTSynthetic Aperture Radar (SAR) is a radar technology that used for taking an object in the form of 2 or 3 dimensions (remote sensing). It works in the frequency range 1.265 to 1.275 GHZ with a middle frequency of 1.27 GHz. SAR system can work optimally if it support a filter device that can pass the desired frequency. Previously there has been research that makes this device in the same frequency band but using 5885 duroid material and square resonator. Bandpass filter In this study designed using Hairpin line method and FR4 epoxy material. The measurement results of Return Loss values are still quite large  arround -9.33 dB and Insertion Loss minimum at -13.51 dB.Keywords: Syntethic Aperture Radar, Band Pass Filter, Hairpin line
Improvement in the LDPC Error Correction Process Based on FPGA Implementation Aditia, Tarigan; Purnamasari, Rita; Saputra, Efa Maydhona
JMECS (Journal of Measurements, Electronics, Communications, and Systems) Vol. 1 No. 1 (2015): JMECS
Publisher : Universitas Telkom

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25124/jmecs.v1i1.1476

Abstract

LDPC is one of channel coding technique which can achieve the nearest to the shannon limit. The focus of this paper is to give improvement for LDPC error correcting process using message passing algorithm. This works used FPGA Cyclon II for implementing the process. This paper worked with two different LDPC matrix, matrix (8, 16) and matrix (24, 48). Matrix (24,48) had wc = 4 and wr = 8. Matrix (8, 16) had wc = 2 and wr = 4. The comparison of these two matrix would present the effects in the error correcting decision for message passing algorithm and the effect for implementing the algorithm on FPGA Cyclon II. This research purpose was to prove message passing algorithm can provide more than one bit error correction.
Rancang Bangun Prototipe Detektor Gangguan Listrik Berbiaya Rendah Berbasis IP pada Kampus Institut Teknologi Sumatera Saputra, Efa Maydhona; Ramadhani, Uri Arta
Electrician : Jurnal Rekayasa dan Teknologi Elektro Vol. 16 No. 2 (2022)
Publisher : Department of Electrical Engineering, Faculty of Engineering, Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/elc.v16n2.2271

Abstract

The ITERA electrical faults cannot be handled quickly by electricians due to the absence of a qualified monitoring system. It is also not possible to purchase a monitoring system with institutional scale because of the high price. Therefore, a low-cost electrical fault detector is designed with current sensor SCT013-000 as main device and communicates over an IP-based network. This detector is integrated with an electrical network information system that can be monitored via a web-browser. The system designed has succeeded in providing information on electrical disturbances with an average delay of 6 seconds and a maximum of 64 seconds when the detector loses its electricity supply. The price for a set of detectors with 2 sensors is around Rp. 249,500, it is relatively cheaper than similar products on the market.
Co-Authors Aditia, Tarigan FITRIANTO, RIFAN Ramadhani, Uri Arta Rita Purnamasari YUYUN SITI ROHMAH