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All Journal Jurnal Teknologi Elektro Angkasa: Jurnal Ilmiah Bidang Teknologi Jurnal Ilmiah Teknik Industri KURVATEK Aviation Electronics, Information Technology, Telecommunications, Electricals, and Controls (AVITEC) Jurnal Engine: Energi, Manufaktur, dan Material Indonesian Journal of Electrical Engineering and Computer Science Prosiding Seminar Nasional Rekayasa Teknologi Industri dan Informasi ReTII
Diah Suwarti Widyastuti
Institut Teknologi Nasional Yogyakarta
Aerospace Engineering Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Physics Social Sciences Transportation

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Rancang Bangun Receiver Automatic Dependent Surveillance Broadcast (ADS-B) Menggunakan RTL-SDR R820T2 Flight Aware Dermawan, Denny; Setiawan, Paulus; Wahyudin, Wahyudin; Widyastuti, Diah Suwarti
Jurnal Teknologi Elektro Vol 14, No 3 (2023)
Publisher : Electrical Engineering, Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/jte.2023.v14i3.006

Abstract

Teknologi radar pada bandar udara mulai tergantikan oleh sistem Automatic Dependent Survaillance Broadcast (ADS-B) karena ketidakmampuan radar dalam mendeteksi pesawat yang tertutup awan tebal, untuk menggantikan fungsi radar di beberapa bandar udara masih menggunakan situs Flightradar24 sebagai sumber informasi karena untuk membangun sebuah stasiun ADS-B membutuhkan biaya yang mahal. Akan tetapi Flightradar24 memiliki beberapa kelemahan, diantaranya adalah pengguna diharuskan untuk membayar atau berlangganan secara berkala jika ingin menampilkan informasi lebih detail, dan delay karena pemrosesan data yang membutuhkan akses koneksi internet. Receiver ADS-B bekerja dengan menunggu dan menerima transmisi dari pesawat terbang yang berisi informasi posisi pesawat secara berkala, dalam merancang receiver ADS-B ini peneliti menggunakan jenis RTL-SDR R820T2 Flight Aware dengan nilai gain sebesar 19 dB, dan penambahan antena ADS-B 1090 MHz. Hasil pengujian rancangan receiver ADS-B yaitu, receiver mampu menerima sinyal dan data parameter target ADS-B dengan jarak jangkauan sejauh 353 km pada range software adsbSCOPE dan 346,89 km secara perhitungan menggunakan metode harvesine formula.
Pengaruh Ventilated Frame terhadap Distribusi Temperatur dan Kinerja Panel Surya Rivan Muhfidin; Wartono; Sumpena; Diah Suwarti Widyastuti
Jurnal Engine: Energi, Manufaktur, dan Material Vol. 10 No. 1 (2026)
Publisher : Universitas Proklamasi 45

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30588/jeemm.v10i1.2684

Abstract

The increase in operating temperature is one of the main factors limiting solar panel performance because it reduces the power output and efficiency of photovoltaic systems. This study aims to analyze the effect of a ventilated frame on temperature distribution, power output, and solar panel efficiency. The research was conducted using an experimental approach with three configuration variations: no frame, conventional aluminium frame (solid frame), and ventilated aluminium frame (ventilated frame). The experiments were carried out for three days under clear weather conditions from 07:00 to 17:00. The measured parameters included solar irradiance, panel surface temperature, voltage, current, and output power. The results showed that panel temperature increased with increasing solar irradiance and reached its peak during midday. The ventilated frame produced a more uniform temperature distribution, reduced panel temperature by approximately 0.5–1.5°C, and improved power output by 1%–3% and efficiency by approximately 0.1%–0.2% compared to the conventional frame. In addition, the efficiency sensitivity to temperature was found to be in the range of 0.07–0.08%/°C, indicating that panel performance is strongly influenced by thermal conditions. These findings demonstrate that the ventilated frame has the potential to serve as an effective passive cooling solution for improving the thermal and electrical performance of solar panels without requiring additional energy and can be applied to existing photovoltaic systems with minimal structural modification.
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.
Co-Authors Adi Setiawan Arif Basuki Bagas Nur Susanto Budi Utama, Budi Christina Manitik Cipto Driyo Denny Dermawan Denny Dermawan Dulhadi, Dulhadi Indra Budhi Frebrianto Ridayati Ridayati Setiawan, Paulus Sidik, Aden Ilyas Sugiarto Kadiman Sugiarto S Sumpena Wahyudin Wahyudin Wartono Wartono