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All Journal International Journal of Electrical and Computer Engineering Seminar Nasional Aplikasi Teknologi Informasi (SNATI) Jurnal Simetris TELKOMNIKA (Telecommunication Computing Electronics and Control) Jurnal EECCIS Sinergi Journal of ICT Research and Applications Jurnal Teknologi Elektro Proceeding of the Electrical Engineering Computer Science and Informatics InComTech: Jurnal Telekomunikasi dan Komputer Techne : Jurnal Ilmiah Elektroteknika Jurnal Abdi Masyarakat (JAM) Jurnal Ilmu Teknik dan Komputer Indonesian Journal of Electrical Engineering and Computer Science International Journal of Advanced Technology in Mechanical, Mechatronics and Material (IJATEC) Journal of Telecommunication, Electronics and Control Engineering (JTECE) Journal of Integrated and Advanced Engineering (JIAE) Jurnal Impresi Indonesia Journal of Informatics and Communication Technology (JICT) Jurnal Rekayasa elektrika Molekul: Jurnal Ilmiah Kimia Journal of Informatics and Communication Technology (JICT) Indonesian Journal of Electronics, Electromedical Engineering, and Medical Informatics Jurnal Elektronika dan Telekomunikasi
Mudrik Alaydrus
Department Of Electrical Engineering, Faculty Of Engineering, Universitas Mercu Buana, Jakarta
Religion Biochemistry, Genetics & Molecular Biology Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Health Professions Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Mechanical Engineering Social Sciences

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Monitoring of Blood Cholesterol Measurement System Using ICT-Based Non-Invasive Methods Oktariadi, Nanda; Alaydrus, Mudrik
Indonesian Journal of Electronics, Electromedical Engineering, and Medical Informatics Vol. 5 No. 4 (2023): November
Publisher : Jurusan Teknik Elektromedik, Politeknik Kesehatan Kemenkes Surabaya, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35882/ijeeemi.v5i4.186

Abstract

Coronary heart disease is a public health problem because of its very high morbidity and mortality, the death rate caused by coronary heart disease is quite high in the world, including in Indonesia. This study aims to analyze and develop and realize the application of non-invasive blood cholesterol measurement based on ICT. Contribution of this research is that it can be used as a reference or recommendation for developing a non-invasive ICT-based blood cholesterol measurement system. The research method used in this study is the library study method and the experimental method. The results of this study are: (1) The monitoring system for measuring blood cholesterol levels Non-invasive methods using near infrared technology can be implemented properly and can be monitored based on ICT using webBase; (2) Tests were carried out on 25 random samples with two conditions, conditions before eating and conditions after eating and compared with the invasive method (auto check), found an accuracy value in conditions before eating of 98.47% with an error value of 1.53%, while in the condition after eating found an accuracy of 98.55% with an error value of 1.45%; (3) Testing the blood cholesterol level detection tool with Non-invasive shows a more real time with a duration of 10 seconds until the results are displayed on the LCD screen, while with an invasive method it shows a measurement duration of 26 seconds until the results are displayed on the screen. (4) Based on this test, a non-invasive cholesterol level measuring device can be used as a reference in the development of a blood cholesterol measurement tool so that it can be an option for routine measurements.
Enhanced Microwave Absorbing Characteristics of Cerium Barium Ferrite Composite: Effect of Sintering Temperature Variation Widanarto, Wahyu; Tamtowi, Tomy; Effendi, Mukhtar; Rahmawati, Dina; Supriyanti, Retno; Ghoshal, Sib Krishna; Kurniawan, Candra; Jatmika, Jumaeda; Handoko, Erfan; Umar, Lazuardi; Alaydrus, Mudrik
Molekul Vol 20 No 3 (2025)
Publisher : Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.jm.2025.20.3.17825

Abstract

ABSTRACT. Cerium barium ferrite composites (CeBFCs) with improved microwave absorbance in the X-band spectral region are advantageous for varied advanced applications. Thus, the influence of various sintering temperatures on the microwave-absorbing traits of CeBFCs was evaluated. The main objective was to enhance the selective microwave absorption of BFC by modifying its magnetic properties through the substitution of Fe³⁺ with Ce³⁺ in the lattice structures. Four composites of CeBF were synthesized via mechanical alloying and sintered at 600, 800, 1000, and 1100°C. The produced samples were analyzed using XRD, VSM, and VNA to determine their microstructures, magnetic properties, and microwave reflection loss at X-band frequencies. XRD results revealed a significant promotion in forming a more pure crystalline barium hexaferrite phase at sintering temperatures higher than 800°C. This structural enhancement could directly influence the magnetic properties of the specimens with a progressive increase in the saturation magnetization with rising sintering temperature. In addition, the sintering temperature variation effectively modulated the electromagnetic properties (complex relative permeability and permittivity) that are vital for impedance matching and optimal wave absorption. The composite sintered at 1000°C displayed an optimal microwave absorption, indicating the lowest reflection loss within the X-band. The obtained products were shown to attenuate and dissipate surplus electromagnetic energy within the 8-12 GHz frequency range. The observed superior performance of the composites was ascribed to a balanced interplay between the magnetic and dielectric losses, leading to efficient impedance matching. It was affirmed that careful tuning of the sintering temperature can improve the crystalline phases, magnetic, electromagnetic, and microwave absorption properties of the proposed CeBFCs. Keywords: Cerium barium ferrite, Microwave absorption, Reflection loss, Sintering temperature, X-band
An ultra-broadband microstrip antenna using a triple dumbbell-shaped defected ground structure Haryanto, Puji; Astuti, Dian Widi; Alaydrus, Mudrik; Firdausi, Ahmad; Rusdiyanto, Dian; A Majid, Huda
SINERGI Vol 30, No 1 (2026)
Publisher : Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/sinergi.2026.1.008

Abstract

Microstrip antennas are widely used in modern communication systems due to their compact size and low profile. However, they typically suffer from narrow bandwidth, limiting their performance in advanced wireless applications. This study addresses this limitation by employing a triple dumbbell-shaped defected ground structure (DGS). The antenna is designed to operate at 3.5 GHz using a Rogers RT5880 substrate, and its performance was analyzed through simulations in HFSS 15.0 software. Without the DGS, the antenna exhibits a fractional bandwidth (FBW) of only 1.71%, operating from 3.47 GHz to 3.53 GHz. Incorporating the triple dumbbell-shaped DGS in the ground layer increases the FBW significantly to 53.6%, extending the operating frequency range from 2.39 GHz to 4.14 GHz. This improvement was achieved through the careful optimization of DGS parameters. The simulated gain at 3.5 GHz is 5.13 dBi. The proposed design demonstrates superior performance compared to conventional techniques such as split-ring resonators (SRR) and Butler matrix (BM) configurations. Simulation and measurement results show excellent agreement, validating the design. The achieved ultra-wideband performance benefits 5G and next-generation systems, offering greater frequency tolerance, diverse signal support, increased capacity, and reliable operation, making the antenna a promising candidate for future wireless applications. 
Metamaterial Layer Loaded on Log Periodic Antenna for Energy Harvesting Levy Olivia Nur; Quzwain, Kamelia; Wahid Nur Hamid; Aisyah Novfitri; Mudrik Alaydrus
Jurnal EECCIS (Electrics, Electronics, Communications, Controls, Informatics, Systems) Vol. 20 No. 1 (2026)
Publisher : Faculty of Engineering, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jeeccis.v20i1.1840

Abstract

This paper investigates metamaterial layer loaded on a log periodic antenna for Radio Frequency (RF) energy harvesting. The proposed antenna was designed at a frequency of 5.8 GHz using Rogers RT5880 substrate with a thickness of 0.787 mm. The log periodic antenna covered with a metamaterial layer was simulated and analyzed. The computational results show a good agreement in which the proposed antenna is able to produce -13.5 dB return loss and 8.3 dB gain with a compact size of 40 x 50. It implies that the proposed concept in this paper can be implemented to increase the antenna performance.
Degradation of Shielding Performance of Metallic Sheet due to Aperture Configuration and Dimension at 2.4 GHz Adik Susilo Wardoyo; Mudrik Alaydrus
Jurnal Elektronika dan Telekomunikasi Vol. 18 No. 1 (2018)
Publisher : National Research and Innovation Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/jet.v18.9-14

Abstract

The increasing demand on wireless connectivity has opened new and modern communication systems. Many wireless systems, for example Wireless Fidelity (Wi-Fi), Bluetooth, ZigBee, share the unlicensed frequency region around 2.4 GHz. Due to intensive application of Wi-Fi systems, there are certain disturbance potentials observed. The Wi-Fi signals cause interference to ZigBee networks which are used for smart grid applications. In this work, the shielding effectiveness of a metallic enclosure with several apertures is studied. Based on analytical expression from the literature, the shielding effectiveness by varying the sheet thickness, number of apertures, and aperture patterns is calculated. Several measurements of Received Signal Strength Indicator (RSSI) are carried out. The measurements are conducted on a shielded room to isolate the measurement from other unknown signal sources. The calculation and measurement of shielding effectiveness confirmed that more apertures on a shielding sheet will reduce the Shielding Effectiveness (SE). SE for one aperture for the case sheet thickness 0.7 mm and diameter of 12 mm reduce from 46.28 dB to 14.24 dB for 6 apertures. Bigger aperture diameters will also degrade the SE from 46.28 dB to 5.27 dB for aperture diameter 24 mm. The same condition can be concluded for the thickness 1.4 mm for aperture diameter of 12 mm. However a slightly different measurement results are obtained for the thickness 1.4 mm and aperture diameter of 24 mm. The thickness plays a significant role to attenuate the wave, so that SE is bigger than the calculated one.
Co-Authors A Majid, Huda Abdi Wahab Adik Susilo Wardoyo Agus Dendi Rochendi Ahmad Firdausi Ahmad Syadidu Rosyadi Aisyah Novfitri Andi Adriansyah Andika Muharam Audi Nantan Ayu Mika Sherila Beny Nugraha Candra Kurniawan Danang Sunandar Darmanik, Sis Yasin Dian Widi Astuti, Budi Irawan Prima Putra, Dian Widi Astuti, Dina Rahmawati Ellisa Agustina Erfan Handoko Fanda Lyta Suzanayanti Fariz Zikrulhaq Yulfinov Fathurahman, Firhan Furqan Furqan Galang P. N. Hakim Galang Persada Nur Hakim Ghoshal, Sib Krishna Hamzah Hilal Haryanto, Puji Haziel Latupapua Indra Dermawan Intan Wahyuni Inu Manggolo Jatmika, Jumaeda Kamelia Quzwain Latupapua, Andrias Izaac Lazuardi Umar Levy Olivia Nur Lukman Medriavin Silalahi Lusi Damayanti Lydia Vintari Majid, Huda A Makarim, Fakhri Zaki Marnel, Sonfia Putra Marza Ihsan Marzuki Meydita Erliana Pardila Mochamad Miftakhul Huda Muhammad Sayidi Muhtar Muhtar Muhtar Muhtar Mukhtar Effendi Muslim Muslim Muzammil Jusoh Oki Teguh Karya Oktariadi, Nanda Oktavia, Maharani Purwo Panggalih Gentayu Putri Wulandari RAHAYU, FAJAR Regina Lionnie Reka Pahlevi Retno Supriyanti Reza Farizqi Rio Mubarak Rizal Broer Bahaweres Rizki Ramadhan Putra Rizky Citra Ramadhan Rochendi, Agus Dendi Rusdiyanto, Dian Said Attamimi Setiyo Budiyanto Sianturi Tigor Franky Devano Sirait, Nurafifah Sis Yasin Darmanik Slamet Riyadi Slamet Riyadi Tamtowi, Tomy Taufik Hidayat Thomas Eibert, Thomas Toni Ismanto Trie Maya Kadarina Umaisaroh Umaisaroh Veronica VERONICA VERONICA Wahid Nur Hamid Wahju Sediono Wahyu Tri Cahyanto Wahyu Widanarto, Wahyu Wardoyo, Adik Susilo Widi Prasetyo Yohanes Bayu Kristanto Zuansah Rachmat Munggaran Zulkarnaen Akbar Zulkarnaen Akbar, Zulkarnaen