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All Journal TELKOMNIKA (Telecommunication Computing Electronics and Control) Jurnal Ilmiah Teknik Elektro Komputer dan Informatika (JITEKI) MULTINETICS
Fahrizal Djohar
Unknown Affiliation
Computer Science & IT Electrical & Electronics Engineering

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Performance Evaluation of Wireless Charger Antenna Design of Mobile Phone djohar, fahrizal; Yudhana, Anton
Jurnal Ilmiah Teknik Elektro Komputer dan Informatika Vol 3, No 1 (2017)
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (384.896 KB) | DOI: 10.26555/jiteki.v3i1.5861

Abstract

Using cable as power transmission medium cause problem in flexibility and aesthetics. Wireless power transmission for charging handphone released nowadays still using antenna with radiation pattern focus in one direction, that is just toward the top, and if the antenna was shifted then power transmitted will be lose. The purpose of this research is to produce wireless power charger system used for charging handphone power using resonator based on omnidirectional antenna and test the performance. The device in this research was designed in two main part, that is transmitter and receiver. In transmission section, there is power supply used for supplying power to oscillator to generate oscillating signal in the form of electrical power to be transmitted to receiver via antenna in the form magnetic field. In receiver section, receiver antenna received the power transmitted that is still in the reach of magnetic field generated by transmitter. The power that is still in the form of oscillating signal, then stabilized for the purpose of handphone power using rectifier and voltage regulator. Design has been made successfully to the form of handphone battery power wireless charger using omdirectional antenna which consist of two main part, that is transmitter and receiver. The transmitted power is 3.058 watt with frequency 714 KHz, and receiver received the power and then stabilized the signal to produce output power 58.706 miliwatt. This device can transmit power in all directions horizontally (angle 360°). This device also tested with some kind of obstacle, with the result almost all obstacle still could transmit the power except metal.
Design of Handphone Wireless Charger System Using Omnidirectional Antenna Anton Yudhana; Fahrizal Djohar
TELKOMNIKA (Telecommunication Computing Electronics and Control) Vol 15, No 4: December 2017
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/telkomnika.v15i4.5819

Abstract

Using cable as power transmission medium cause problem in flexibility and aesthetics. Wireless power transmission for charging handphone releasednowadays still using antenna with radiation pattern focus in one direction, that is just toward the top, and if the antenna was shifted then power transmitted will be lose. The purpose of this research is to produce wireless power charger system used for charging handphone power using resonator based on omnidirectional antenna and test the performance. The device in this research was designed in two main part, that is transmitter and receiver. In transmission section, there is power supply used for supplying power to oscillator to generate oscillating signal in the form of electrical power to be transmitted to receiver via antenna in the form magnetic field. In receiver section, receiver antenna received the power transmitted that is still in the reach of magnetic field generated by transmitter. The power that is still in the form of oscillating signal, then stabilized for the purpose of handphone power using rectifier and voltage regulator. Design has been made successfully to the form of handphone battery power wireless chargerusing omdirectional antenna which consist of two main part, that is transmitter and receiver. The transmitted power is 3.058 watt with frequency 714 KHz, and receiver received the power and then stabilized the signal to produce output power 58.706 miliwatt. This device can transmit power in all directions horizontally (angle 360°). This device also tested with some kind of obstacle, with the result almost all obstacle still could transmit the power except metal.
Performance Evaluation of Wireless Charger Antenna Design of Mobile Phone Anton Yudhana; Fahrizal Djohar
Jurnal Ilmiah Teknik Elektro Komputer dan Informatika Vol 3, No 1 (2017)
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (384.896 KB) | DOI: 10.26555/jiteki.v3i1.5861

Abstract

Using cable as power transmission medium cause problem in flexibility and aesthetics. Wireless power transmission for charging handphone released nowadays still using antenna with radiation pattern focus in one direction, that is just toward the top, and if the antenna was shifted then power transmitted will be lose. The purpose of this research is to produce wireless power charger system used for charging handphone power using resonator based on omnidirectional antenna and test the performance. The device in this research was designed in two main part, that is transmitter and receiver. In transmission section, there is power supply used for supplying power to oscillator to generate oscillating signal in the form of electrical power to be transmitted to receiver via antenna in the form magnetic field. In receiver section, receiver antenna received the power transmitted that is still in the reach of magnetic field generated by transmitter. The power that is still in the form of oscillating signal, then stabilized for the purpose of handphone power using rectifier and voltage regulator. Design has been made successfully to the form of handphone battery power wireless charger using omdirectional antenna which consist of two main part, that is transmitter and receiver. The transmitted power is 3.058 watt with frequency 714 KHz, and receiver received the power and then stabilized the signal to produce output power 58.706 miliwatt. This device can transmit power in all directions horizontally (angle 360°). This device also tested with some kind of obstacle, with the result almost all obstacle still could transmit the power except metal.
Potensi Penerapan VANET Untuk Pengembangan Smart City di Kota Ternate Djohar, Fahrizal
MULTINETICS Vol. 10 No. 2 (2024): MULTINETICS Nopember (2024)
Publisher : POLITEKNIK NEGERI JAKARTA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32722/multinetics.v10i2.6774

Abstract

Abstrak-- Pengembangan Internet of Things (IoT) telah menjadi fokus penelitian selama beberapa tahun terakhir dan diperkirakan akan terus berkembang di masa depan. Komunikasi antar perangkat juga sedang dikembangkan seperti teknologi Vehicle Ad-hoc Network (VANET) memungkinkan pertukaran informasi antar kendaraan, namun memiliki karakteristik unik seperti mobilitas tinggi antar node, topologi yang sangat dinamis, tingkat kehilangan data yang cukup signifikan, dan durasi komunikasi antar node yang relatif singkat. Disamping itu, dengan meningkatnya jumlah kendaraan di kota, hal ini dapat dimanfaatkan untuk pengembangan sistem komunikasi di masa mendatang. Penelitian ini bertujuan untuk menghadirkan peluang sistem komunikasi antar kendaraan pada daerah perkotaan, menjadikan VANET sebagai pilihan utama untuk penerapan. Simulasi dilakukan dengan memodelkan kondisi jalan yang dinamis dan mobilitas kendaraan yang tinggi, serta mengukur parameter utama seperti tingkat penerimaan paket, dan tingkat kehilangan paket. Empat protokol digunakan dengan parameter tingkat penerimaan dan jumlah paket yang diterima, dan hasilnya menunjukkan bahwa protokol dengan kinerja terbaik secara berurutan adalah DSR, AODV, DSDV, dan OLSR. Dengan demikian, penelitian ini diharapkan dapat memberikan kontribusi sebagai salah satu konsep smart city dalam pengembangan kota di masa depan.
Co-Authors Anton Yudhana