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All Journal Aviation Electronics, Information Technology, Telecommunications, Electricals, and Controls (AVITEC) Journal of Integrated Knowledge and Innovation
Adi Setiawan
Institut Teknologi Dirgantara Adisutjipto
Aerospace Engineering Computer Science & IT Electrical & Electronics Engineering Engineering

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Pemanfaatan Teknologi Unmanned Aerial Vehicle (UAV) Dalam Bidang Pertanian Untuk Mendukung Ketahanan Pangan Fajar Nugroho; Dedet Hermawan Setiabudi; Abdul Haris Subarjo; Adi Setiawan; Djarot Wahju Santoso; Nurfi Ahmadi; Bambang Sudibya; R. Nur Ahmad Triwibowo
Journal of Integrated Knowledge and Innovation Vol. 2 No. 1 (2026): Vol.2 No.1 2026
Publisher : Universitas Pahlawan Tuanku Tabusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jiki.v2i1.37

Abstract

Perkembangan teknologi cukup pesat, salah satu perkembangan teknologi tersebut penggunaan Unmanned Aerial Vehicle (UAV). Penggunan UAV telah dilakukan pada beberapa bidang, diantaranya bidang pertanian. Berdasarkan kajian literatur jurnal nasional dan internasional, penggunaan UAV terbukti sangat efektif meningkatkan presisi dan efisiensi pada bidang pertanian, keuntungannya meminimalkan dampak negatif terhadap lingkungan serta kesehatan petani. Teknologi UAV menawarkan solusi modern bagi petani dalam meningkatkan efisiensi, keamanan, dan keberlanjutan produksi hasil pertanian Diharapkan dengan efisiensi meningkat dapat mendukung program pemerintah meningkatkan ketananan pangan.
VHF Doppler Radio Direction Finding Using an Eight-Element Switched Antenna Array Arif Basuki; Denny Dermawan; Diah Suwarti Widyastuti; Bagas Nur Susanto; Adi Setiawan
Aviation Electronics, Information Technology, Telecommunications, Electricals, and Controls (AVITEC) Vol 8, No 2 (2026): August
Publisher : Institut Teknologi Dirgantara Adisutjipto

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28989/avitec.v8i2.4018

Abstract

Communication between radio transmitters and receivers is commonly evaluated based on signal quality, while the direction of arrival (DoA) of the signal is less frequently exploited in conventional communication systems. This study presents the design and preliminary field validation of a Doppler-based Radio Direction Finder (RDF) operating in the Very High Frequency (VHF) band using an eight-element switched antenna array. The proposed system applies a single-receiver pseudo-Doppler architecture in which eight antenna elements are sequentially switched to emulate virtual antenna rotation and generate a Doppler-modulated audio-frequency signal. The signal is processed through filtering, zero-crossing detection, and phase-based bearing estimation, and the resulting direction is displayed using a 16-segment circular LED indicator with 22.5° angular resolution. Field measurements were conducted at three locations in the 144–146 MHz band, with transmitter–receiver distances ranging from approximately 100 m to 1,500 m. The measured angular errors were 4.455°, 7.551°, and 5.154°, corresponding to relative angular errors of 1.24%, 2.10%, and 1.43%, respectively, with an average relative angular error of approximately 1.59%. These results indicate that the proposed eight-element pseudo-Doppler RDF prototype can provide practical bearing estimation under the tested VHF field conditions. However, further experiments involving more azimuth angles, repeated measurements, and direct comparison with a four-element configuration are required to confirm robustness and quantify the performance improvement of the proposed system.
Power-Loss and Efficiency Comparison of SiC C3M0075120D and GaN GS66508B in a DC–DC Buck Converter Adi Setiawan; Bambang Sudibya; R. Nur Akhmad Triwibowo; Okto Dinaryanto
Aviation Electronics, Information Technology, Telecommunications, Electricals, and Controls (AVITEC) Vol 8, No 2 (2026): August
Publisher : Institut Teknologi Dirgantara Adisutjipto

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28989/avitec.v8i2.4206

Abstract

The growing demand for high-efficiency power conversion has accelerated adoption of wide-bandgap (WBG) devices in DC-DC converters. While SiC and GaN MOSFETs outperform conventional silicon, direct quantitative comparisons under identical buck-converter conditions remain an area of active investigation. This simulation-based study investigates power losses and estimated efficiency of SiC C3M0075120D (1200 V, 75 m ) and GaN GS66508B (650 V, 50 m ) in a 200 V-to-100 V, 50 kHz DC-DC buck converter under identical loads (5 A and 10 A). Using LTspice simulations with manufacturer-supplied models and Double Pulse Test methodology for loss separation, the study explicitly distinguishes switching and conduction losses under fixed operating conditions, providing validated simulation-based quantification for these specific devices. The results indicate that for the GaN device achieves lower modeled total losses than the SiC device at 10 A (6.85 W vs. 17.05 W) and attains higher simulated estimated converter efficiency (99.31% vs. 98.25% at full load). For the two specific devices and simulated operating conditions examined, switching loss remains the dominant loss mechanism at 50 kHz. A frequency sensitivity analysis from 50 to 500 kHz reveals that the GaN device maintains approximately 60% lower losses across the frequency range, with absolute savings increasing from 10.2 W to 91.2 W. These findings apply specifically to the investigated devices and operating conditions, and the comparison involves devices with different voltage ratings. The methodology demonstrates the utility of LTspice as a pre-prototyping tool for WBG converter development, although experimental validation remains necessary to confirm estimated efficiency figures.
Co-Authors Abdul Haris Subarjo Arif Basuki Bagas Nur Susanto Bambang Sudibya Dedet Hermawan Setiabudi Denny Dermawan Diah Suwarti Widyastuti Djarot Wahju Santoso Fajar Nugroho Nurfi Ahmadi Okto Dinaryanto R. Nur Ahmad Triwibowo R. Nur Akhmad Triwibowo