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All Journal Jurnal Elektronika dan Telekomunikasi Makara Journal of Science
Dadin Mahmudin, Dadin
Indonesian Institute of Sciences (LIPI)
Electrical & Electronics Engineering Engineering

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Monitoring Kualitas Air Secara Real-Time Terintegrasi Maulana, Yudi Yuliyus; Mahmudin, Dadin; Wijaya, R Indra; Wiranto, Goib
Jurnal Elektronika dan Telekomunikasi Vol 15, No 1 (2015)
Publisher : Indonesian Institute of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1261.83 KB) | DOI: 10.14203/jet.v15.23-27

Abstract

Perkembangan budi daya ikan yang menggunakan keramba jaring apung (KJA), saat ini tersebar di berbagai waduk dan danau di seluruh Indonesia, saat ini tumbuh pesat dan menjadi andalan pendapatan daerah. Selama ini monitoring kualitas air dilakukan secara manual, yaitu melakukan pengukuran kualitas air di tempat budidaya ikan tersebut. Selain memerlukan waktu yang lama, biasanya budi daya ikan tersebut berada jauh dari pusat kota. Dalam makalah ini akan dijelaskan desain dan realisasi sistem monitoring kualitas air dan peringatan dini secara real-time yang terintegrasi. Sistem ini telah diterapkan secara khusus untuk memantau parameter suhu, DO (dissolved oxygen) dan pH di sentral budidaya ikan di Waduk Cirata. Tujuannya adalah memantau kualitas air secara real-time, bisa diakses di mana saja dan sekaligus mencegah kematian ikan secara massal yang disebabkan oleh terjadinya up-welling dengan menggunakan sistem peringatan dini. upwelling terjadi apabila nilai suhu menurun drastis mencapai 25 derajat celcius lalu nilai DO menurun sampai 2,38 mg/L. Di sisi lain, data dari stasiun pengukuran yang dikumpulkan di stasiun perantara dapat diakses atau dikirimkan ke stasiun pengendali dengan menggunakan sistem telemetri. Hasil dari penelitian ini memperlihatkan suatu sistem monitoring kualitas air untuk memantau parameter suhu, DO dan pH sekaligus peringatan dini terjadinya upwelling. Sistem ini untuk mendukung pembudidayaan ikan di danau-danau di Indonesia.
Fabrication of Polyimide Optical Waveguide on Silicon Dioxide Layer Stacked Silicon Substrate Mahmudin, Dadin; -, Shobih; Daud, Pamungkas; Wijayanto, Yusuf Nur
Jurnal Elektronika dan Telekomunikasi Vol 17, No 2 (2017)
Publisher : Indonesian Institute of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/jet.v17.36-41

Abstract

Optical waveguides are important for guiding lightwave from a place to other places. Propagation and insertion losses of the optical waveguides should be considered to be in low values. Recently, optical waveguides with circular structures, which are optical fibers, are used widely for guiding lightwave in long-distance optical communication with very low propagation and insertion losses. Simultaneously, optical waveguides with planar structure are also developed for short distance communication in optical devices. We have reported design and analysis of the planar optical waveguides. In this paper, fabrication of planar optical waveguides using a polyimide material on thin silicon dioxide combined with the silicon substrate is reported. The polyimide material is used for the core of the optical waveguides. The silicon dioxide located on the silicon substrate and the air is used for cladding of the optical waveguides. Fabrication of the optical waveguides such as oxidation, photoresist coating, masking, ultra-violet exposure, and etching was done. The fabricated optical waveguides were characterized physically using a standard microscope and scanning electron microscope (SEM). The fabrication processes and characterization results are reported and discussed in detail.
Design of Rectangular Optical Waveguide on LiTaO3 Crystal Using Thermal Annealled Proton Exchange Methods Wijayanto, Yusuf Nur; Mahmudin, Dadin; Daud, Pamungkas
Jurnal Elektronika dan Telekomunikasi Vol 14, No 1 (2014)
Publisher : Indonesian Institute of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (599.845 KB) | DOI: 10.14203/jet.v14.20-23

Abstract

Optical waveguides are the key component for distributing optical signals with very low propagation loss in optical communication. Several type optical waveguides are established currently such as silica optical fiber. In the planar structure, planar optical waveguides are suitable for implementing to integrated optic applications. In here, rectangular optical waveguides on a planar structure with a LiTaO3 crystal as the substrate are described. The optical waveguides were designed for single mode operation at infrared optical wavelength. The Marcatili method is used for designing by separated the rectangular optical waveguides into two slab optical waveguides. Design rules for the rectangular optical waveguides are discussed in this paper
Perancangan dan Implementasi Pengontrol Arah Pancaran Radar Pengawas Pantai Terhadap Sudut Tertentu Mahmudin, Dadin; Dharma, Andri Setya; Susanto, Erwin; Wahyu, Yuyu
Jurnal Elektronika dan Telekomunikasi Vol 14, No 1 (2014)
Publisher : Indonesian Institute of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (428.898 KB) | DOI: 10.14203/jet.v14.29-35

Abstract

Dewasa ini telah banyak dilakukan  penelitian dan pengembangan radar . Salah satunya adalah radar yang ditempatkan di Kapal Laut. Penempatan radar di kapal laut mempunyai kendala pada tiang agung kapal. Tiang agung akan mengganggu fungsi radar karena adanya pantulan sinyal jarak dekat pada tiang agung. Hal ini dapat diantisipasi dengan mematikan pancaran radar saat arah pancaran radar menuju pada tiang agung kapal laut.Oleh sebab itu didalam penelitian ini dirancang  prototype untuk mengatur otomatis aktif dan tidaknya pancaran radar berdasarkan arah pancaran radar. Kontrol aktif  dan tidaknya pancaran radar ini dikontrol menggunakan perpaduan sensor ultrasonik dan sensor kompas dengan dilengkapi metode fuzzy sebagai logika jauh dekatnya tiang agung. Jika sensor ultrasonik membaca adanya halangan maka pancaran tidak aktif begitu sebaliknya. Penggabungan kedua sensor ini bertujuan jika sensor ultrasonik tidak dapat bekerja karena hujan maka kontrol sudut pada sensor kompas yang akan bekerjaSetelah dilakukan perancangan dan pengujian pada alat ini maka diperoleh sudut deviasi dengan range 14,30 – 29,30 dengan eror ± 30. Dengan acuan jangkauan titik tiang agung 60-120cm dari poros radar dengan lebar tiang 30cm. Kecepatan yang diperoleh saat fuzzy berlangsung sebesar 20 kali rpm dari kecepatan normal saat prototype mengenai halangan. Serta adanya sensor hujan berperan sebagai switch sensor ultrasonik ke mode off dan mode on untuk sensor kompas dengan menggunakan inisialisasi awal. Dari data yang dihasilkan prototype ini maka diperoleh keberhasilan sebesar 85% dilihat dari pengujian beberapa sensor dan peggabungannya. Oleh sebab itu apabila prototype ini direalisasikan akan membantu penelitian industri perkapalan dalam pembuatan radar sesungguhnya.
Design of 3-stages Parallel Cascade Micro-ring Resonator Type of Interleave Filter for Optical Communication Application Maulana, Yudi Yuliyus; Mahmudin, Dadin
Jurnal Elektronika dan Telekomunikasi Vol 15, No 2 (2015)
Publisher : Indonesian Institute of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1463.444 KB) | DOI: 10.14203/jet.v15.66-70

Abstract

Filter will be one of the most important components of the next generation of optical communications. Micro-ring resonators have been widely studied as a potential device for dense wavelength filter due to its advantages. In this paper, a waveguide-based microring-resonator type of interleave filter is investigated. The cascade structure is applied to obtain better characteristics of filter spectra. Our calculation shows that, compared with 2-stage or 4-stage cascade, 3-stage cascaded microring resonator has better performance with pass-band width of 22 GHz, ripple ratio < 1 dB, crosstalk of -33 dB for 1×2 interleaver and -24 dB for 1×4 interleaver. Numerical calculation also clearly shows that general optical waveguide types is reasonable as microring resonator with insertion loss < 2 dB
Pemandu Gelombang Optik Polimer pada Substrat Silikon Dioksida untuk Panjang Gelombang 1,55 µm Mahmudin, Dadin; Wijayanto, Yusuf Nur
Jurnal Elektronika dan Telekomunikasi Vol 14, No 2 (2014)
Publisher : Indonesian Institute of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (569.108 KB) | DOI: 10.14203/jet.v14.56-60

Abstract

Cahaya dapat dirambatkan dengan efektif melalui pandu gelombang optik untuk aplikasi teknologi komunikasi. Pandu gelombang optik memiliki beberapa struktur seperti struktur melingkar (serat optik) dan struktur planar (pandu gelombang optik persegi).Serat optik pada umumnya digunakan untuk komunikasi jarak jauh dan pandu gelombang optik persegi digunakan untuk komunikasi jarak pendek. Dalam tulisan ini, dibahas pandu gelombang optik persegi dengan menggunakan bahan polimer pada substrat silikon dioksida untuk panjang gelombang optik 1,55 µm. Bahan polimer digunakan sebagai inti (core) dari pandu gelombang optik. Silikon dioksida dan udara digunakan sebagai selubung (cladding). Bahan polimer digunakan sebagai inti karena nilai indeks biasnya lebih besar dibanding material lain yang digunakan sebagai selubung. Analisis pandu gelombang optik dihitung dengan menggunakan software Wolfram Mathematica yang berdasarkan pada metode Marcatili dan persamaan Maxwell. Distribusi medan dan mode dispersi dari pemandu gelombang optik telah diperoleh untuk panjang gelombang optik 1,55 µm. Moda operasi dari pandu gelombang optik dapat dikontrol dengan mengatur ukuran panjang dan lebar dari inti. Analisis dan hasil pandu gelombang optik dibahas secara rinci.Pandu gelombang optik menggunakan bahan polimer pada substrat silikon dioksida dapat digunakan untuk rangkaian optik terpadu dan perangkat penginderaan optik.
Design of Asymmetric Parallel-Cascaded Micro-Ring Resonator Using Transfer Matrix and Signal Flow-Graph Methods Mahmudin, Dadin; Daud, Pamungkas; Wijayanto, Yusuf Nur
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 (590.353 KB) | DOI: 10.14203/jet.v13.28-32

Abstract

Asymmetric parallel-cascaded micro-ring resonator (APCMR) is proposed. The proposed device is composed of two or more micro-ring-resonators with different diameter. The proposed device is designed using transfer matrix combined with signal flow graph methods. The designed device with crosstalk less than and equal -10 dB can be obtained by setting coupling coefficient. The proposed device can be used for optical filters and sensors.
Sensitivity Enhancement of Silicon-on-Insulator Multipath Ring Resonator using Gold Nanodisk for Sensor Application Dicky, Gabriel; Taufiqurrahman, Shidqie; Estu, Topik Teguh; Wijayanto, Yusuf Nur; Manurung, Robeth Viktoria; Mahmudin, Dadin; Anshori, Isa; Daud, Pamungkas
Makara Journal of Science Vol. 24, No. 3
Publisher : UI Scholars Hub

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

Abstract

Currently, environmental degradation caused by heavy metals has become a serious concern of many countries. To monitor the concentration of heavy metals in the environment, an in-situ sensor that can measure in real time and has high quality, sensitivity, and flexibility is essential. We proposed a modified multipath ring resonator (MPRR) based on silicon-on-insulator technology with additional gold nanodisk (GND) on top of the ring to increase its sensitivity. To prove the effect of GND on the sensitivity of the modified MPRR, finite-difference time-domain simulations were conducted. Results showed that the average sensitivity of the modified MPRR was 675 nm/RIU, where RIU corresponds to the refractive index unit, higher than that of the unmodified MPRR (171 nm/RIU). Moreover, compared with the single ring structure, the proposed design had better sensitivity. We believe that our proposed approach for the modification of MPRR is suitable for application to optical sensor development.
Comparison of a Circular Patch Unit Cell Performance for Reflector Applications between Using FR4 and F4BMX220 Substrates at 3.5 GHz Frequency -, Taufiqqurrachman; Abdul Rahim, Muhammad Kamal; Mahmudin, Dadin; Adji, R. Priyo Hartono; Kurniadi, Deni Permana; Desvasari, Winy; -, Sulistyaningsih; Darwis, Fajri; Rahman, Arief Nur; Putranto, Prasetyo; Setiawan, Arie; Rizal, Aminuddin
Jurnal Elektronika dan Telekomunikasi Vol 23, No 2 (2023)
Publisher : National Research and Innovation Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/jet.587

Abstract

This paper presents a performance comparison of the circular patch unit cell as a unit cell for reflector application at 3.5 GHz frequency using a dielectric substrate between FR4 and F4BMX220 substrates. A circular patch is chosen as the unit cell of a reflector because it is commonly used, fabricated, and has a wider bandwidth compared to other structures. A performance comparison of the circular patch on both dielectric substrates is presented in a graph of S-parameters, reflection phase, and operating bandwidth, as well as in the table of dimensions, where the result is performed by simulation using CST software. Based on the simulated results, the F4BMX220 has a better performance compared to the FR4 in terms of the reflection value, operating bandwidth, and dielectric substrate thickness. However, a circular patch diameter when using the F4BMX220 is bigger than when using the FR4 substrate because the FR4 substrate has a higher dielectric constant than the F4BMX220, which is twice the F4BMX220 dielectric constant. Also, the F4BMX220 substrate has a narrower bandwidth compared to the FR4 substrate, which is a difference of around 0.1 GHz. The circular patch when using the F4BMX220 substrate has 0.96 of a reflection value, 0.007 of an absorption value, -6.77° of the reflection phase, and 0.24 GHz of the operating bandwidth at the normal incident wave angle (0°). Also, it can be properly worked if the incident wave angle is moving until 60°. The F4BMX220 substrate has the best performance compared to the FR4 substrate because the reflection value is much better value, even at the incident wave angle of 60°.
Co-Authors -, Shobih -, Taufiqqurrachman Abdul Rahim, Muhammad Kamal Adji, R. Priyo Hartono Aminuddin Rizal, Aminuddin arief nur rahman Daud, Pamungkas Desvasari, Winy Dharma, Andri Setya Dicky, Gabriel Erwin Susanto Fajri Darwis, Fajri Goib Wiranto, Goib Isa Anshori Kurniadi, Deni Permana Manurung, Robeth Viktoria Nurwijayanti Putranto, Prasetyo Sulistyaningsih -, Sulistyaningsih Taufiqurrahman, Shidqie Topik Teguh Estu, Topik Teguh Wijaya, R Indra Yudi Yuliyus Maulana, Yudi Yuliyus Yusuf Nur Wijayanto, Yusuf Nur Yuyu Wahyu