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Leonardus Sandy Ade Putra
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leonardusandy@ee.untan.ac.id
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telectrical@untan.ac.id
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Jl. Prof. Dr. Hadari Nawawi, Pontianak 78124, Indonesia
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INDONESIA
Telecommunications, Computers, and Electricals Engineering Journal
Published by Universitas Tanjungpura
ISSN : -     EISSN : 30260744     DOI : https://dx.doi.org/10.26418/telectrical.v1i2
Core Subject : Science, Engineering,
Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering
Signal Processing; Communication Networks; Artificial Intelligence, Computer Technology; Power Systems; Image Processing
Arjuna Subject : Teknik (semua kategori) - Teknik Listrik dan Elektro
Articles 2 Documents
 1 
Search results for , issue "Vol 3, No 3: February 2026" : 2 Documents clear
Implementation of Automatic Feeding and Monitoring of Pet Development Based on Telecommunication Networks and Android Valioenza, Difa
Telecommunications, Computers, and Electricals Engineering Journal (TELECTRICAL) Vol 3, No 3: February 2026
Publisher : Faculty of Engineering, Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/telectrical.v3i3.100661

Abstract

Increasingly busy daily activities make it difficult for pet owners to feed their pets on time and monitor their development. This can cause discomfort for owners and potential health problems for pets. How can feeding be automated and anabul (fur babies) development be monitored so that pet owners can more easily and efficiently care for their pets amidst their busy schedules? This study aims to design and develop an automatic feeding device and anabul development monitoring system based on telecommunication networks and Android. The designed device is capable of monitoring anabul development by periodically measuring their weight. Data obtained over a week show that the anabul's weight increased well from Monday to Sunday. Additionally, the device's food level reading functions well over the course of a week, ensuring that feeding occurs according to the set schedule.
A Compact Dual-Band Cross-Notched T-Shaped Antenna for High-Efficiency 2.4/5.8 GHz Wi-Fi Energy Harvesting in Self-Powered IoT Devices Ansah, John Nyamekye
Telecommunications, Computers, and Electricals Engineering Journal (TELECTRICAL) Vol 3, No 3: February 2026
Publisher : Faculty of Engineering, Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/telectrical.v3i3.101650

Abstract

This paper presents a dual-band cross-notched T-shaped monopole antenna developed for efficient ambient RF energy harvesting in the 2.4 GHz and 5.8 GHz Wi-Fi bands. The antenna occupies a compact size of 40 40 1.6 mm³, making it suitable for space-constrained IoT and biomedical devices. The proposed antenna demonstrates excellent impedance matching, achieving S11 values of -23.225 dB at 2.4 GHz and -29.096 dB at 5.8 GHz, with corresponding VSWR values of 1.1483 and 1.0727, respectively. It achieves wide impedance bandwidths of 0.71 GHz (2.07–2.78) GHz and 1.78 GHz (5.07–6.85) GHz, yielding fractional bandwidths of 29.28% and 29.87%, ensuring stable operation across both Wi-Fi bands. The antenna measures gains of 2.10 dBi and 4.29 dBi, with directivities of 2.52 dBi and 4.58 dBi, supported by high radiation efficiencies of 90.78% and 93.43% at the two resonant frequencies. The cross-notched T-shape configuration contributes significantly to achieving compactness and enhanced electromagnetic performance, while strategically positioned rectangular notches at the upper-left and lower-right corners are instrumental in achieving dual-band operation. The results demonstrate the antenna’s strong suitability for RF energy harvesting, where high efficiency and wide impedance bandwidth are essential for maximising RF captured power. In summary, the proposed antenna provides a balanced combination of compact size, high radiation efficiency and broad bandwidth, establishing it as a robust candidate for the next-generation battery-less IoT and low-power medical systems.

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