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All Journal Jurnal Elektronika dan Telekomunikasi Indonesian Journal of Electrical Engineering and Computer Science
I Dewa Putu Hermida
Indonesian Institute of Sciences
Electrical & Electronics Engineering Engineering

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Karakterisasi Sensor Gas CO Berbasis Bahan SnO2 dengan Metoda Solgel Menggunakan Teknologi Film Tebal I Dewa Putu Hermida; Parlindungan Sinaga; Gesi Soleha
Jurnal Elektronika dan Telekomunikasi Vol 13, No 2 (2013)
Publisher : LIPI Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/jet.v13.60-65

Abstract

Sensor gas SnO2 termasuk sensor yang paling banyak digunakan dan dikembangkan di pasaran, tapi sampai saat ini belum bisa menghasilkan sensitivitas yang tinggi. Dalam penelitian ini dibahas mengenai karakterisasi sensor gas CO dengan teknologi film tebal yang berbahan SnO2 dan diharapkan dapat menghasilkan sensor dengan sensitivitas yang tinggi. Hasil XRD menunjukan bahwa struktur dari SnO2 adalah rutile tetragonal. Dari pola difraksi terlihat puncak-puncak 110 dan 101 yang menunjukkan pola difraksi yang dibentuk oleh kristal SnO2. Hasil SEM menunjukkan bahwa ukuran sensor dapat mencapai 264 nanometer. Hasil EDS (Energy Dispersive X Ray Spectroscopy) menunjukkan bahwa lapisan sensor yang terbentuk memiliki komposisi O2 (Oksigen) dengan persen massa 21,23% dan Sn (Stanum) dengan persen massa 78,77%. Pengujian sensor dilakukan untuk mengetahui pengaruh perubahan temperatur operasional dan konsentrasi gas terhadap resistansi sensor. Perubahan yang terjadi dalam sensor gas ini, berupa resitansi yang menurun dengan bertambahnya temperatur dan konsentrasi gas CO. Dari hasil pengujian tersebut diketahui bahwa komponen-komponen penyusun sensor dapat merespon adanya gas CO. Nilai sensitivitas yang baik didapat dari hasil pengujian untuk rentang konsentrasi gas 0-500 ppm adalah 9,10-3/ppm.
Microwave and Optical Electric Field Interaction in Microwave Polarization Detector Based on Photonic Technology for EMC Measurement Yusuf Nur Wijayanto; Hiroshi Murata; I Dewa Putu Hermida
Jurnal Elektronika dan Telekomunikasi Vol 16, No 1 (2016)
Publisher : LIPI Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/jet.v16.7-10

Abstract

We analyze the interaction of microwave and optical electric field in a microwave polarization detector based on photonic technology for Electromagnetic Compatibility (EMC) measurement. The detector consists of two orthogonal optical waveguides and patch antennas embedded with two orthogonal gaps fabricated on an Electro-Optic (EO) crystal. Wireless microwave signals can be received, separated and converted directly to lightwave signals through optical modulation using the proposed detector. This detector operates with no external power supply and with low microwave distortion. Microwave polarization can be identified using the proposed interface. In addition, it enables us to measure the magnitude and phase of the wireless signal simultaneously. The analysis of the device was done and presented at the operation frequency of 26 GHz. The proposed interface can be applied for EMC measurement through the radio-over-fiber link.
Design, Simulation and Fabrication of Band Pass Filter 308 MHz Narrow Bandwidth Using Technology Surface Mount Technology (SMT) on FMCW Radar Frequency Generators I Dewa Putu Hermida; Deni Permana Kurniadi; Iqbal Syamsu
Indonesian Journal of Electrical Engineering and Computer Science Vol 3, No 1: July 2016
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijeecs.v3.i1.pp136-142

Abstract

Has been research a band pass filter with a steep slope the working frequency 308MHz with 4 MHz bandwidth used in navigation radar system. To overcome this, the design is done by using two filters are combined. Merger This filter consists of a single filter consisting of a low pass filter with a cutoff frequency that works at a frequency of 310 MHz, and a high pass filter with a cutoff frequency that works at a frequency of 306 MHz Type filter is used to generate the elliptic filter steepness better by ignoring the ripple in the pass band for narrow bandwidth. For a low pass filter, stop band width (Fs) approximately 20% of the cutoff frequency occurs at a frequency of 372 MHz, with stop band depth (As) of about -55 dB As for the high pass filter, stop band width (Fs) approximately 20% of the cutoff frequency that occurred at a frequency of 244.8 MHz, with stop band depth (As) of about -55 dB. The output filter is used as a clock on direct insert digital synthesizer (DDS). Using the components of surface mount technology (SMT), then the resulting circuit with its small dimensions, compact and has a high Q. Elsie used in the simulation stage software version 2.72, the manufacturing process using protel 99SE, and the stage of measurement using a vector network analyzer (VNA) Advantest R3770 type.
Co-Authors Deni Permana Kurniadi Gesi Soleha Hiroshi Murata Iqbal Syamsu Parlindungan Sinaga Yusuf Nur Wijayanto