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All Journal Bulletin of Electrical Engineering and Informatics Innovative: Journal Of Social Science Research
Akbar, Muhammad Firdaus
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Humanities Computer Science & IT Electrical & Electronics Engineering Law, Crime, Criminology & Criminal Justice Public Health Other

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A parametric study on strawberry radiated shaped monopole antenna for ultrawide-band applications Al-Gburi, Ahmed Jamal Abdullah; Zakaria, Zahriladha; Ibrahim, Imran Mohd; Akbar, Muhammad Firdaus; Al-Obaidi, Aymen Dheyaa Khaleel; Khabba, Asma
Bulletin of Electrical Engineering and Informatics Vol 12, No 1: February 2023
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/eei.v12i1.4547

Abstract

This article gives a parametric study on strawberry-shaped monopole antennas for ultra-wideband (UWB) systems. The antenna design consisted of three different parametric design steps to structure the strawberry radiated monopole antenna. The scheduled strawberry monopole antenna was simulated on an FR4 substrate in a low profile for UWB applications. The total physical dimension is 26 mm×26 mm×1.6 mm, corresponding to the centre frequency of 7.5 GHz. The strawberry antenna is fed via a coplanar waveguide (CPW) to attain the best impedance matching for UWB systems. The presented monopole antenna has an impedance UWB bandwidth of 11.0 GHz from 2.6 GHz up to 13.6 GHz at −10 dB return loss. The simulated UWB strawberry monopole antenna displays an omnidirectional radiation behaviour with a simulated gain of 7.3 dB at 13.6 GHz, a directivity of 7.5 dBi at 13.6 GHz and favourable radiation efficiency of 97%. The proposed monopole UWB strawberry antenna has the technological possibility to be used for UWB applications.
Analisis Pengaruh Parameter Pemotongan terhadap Kekasaran Permukaan pada Proses Bubut Baja Karbon Menggunakan Pendingin Minimum Quantity Lubrication (MQL) Pratama, Agung; Saputra, Hanif; Fahmi, Saidul; Akbar, Muhammad Firdaus; Irwati, Dwi
Innovative: Journal Of Social Science Research Vol. 5 No. 4 (2025): Innovative: Journal Of Social Science Research
Publisher : Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/innovative.v5i4.20980

Abstract

Penelitian ini bertujuan untuk mengevaluasi pengaruh berbagai parameter pemotongan terhadap tingkat kekasaran permukaan dalam proses pembubutan baja karbon dengan metode pendinginan Minimum Quantity Lubrication (MQL). Variasi parameter yang diteliti mencakup kecepatan potong, laju pemakanan, dan kedalaman potong. Eksperimen dilakukan menggunakan mesin bubut konvensional dengan pahat berbahan HSS. Hasil penelitian menunjukkan bahwa kombinasi kecepatan potong tinggi dan laju pemakanan rendah menghasilkan permukaan yang paling halus. Selain itu, penerapan MQL secara signifikan menurunkan suhu pemotongan dan memberikan hasil akhir permukaan yang lebih baik dibandingkan metode pembubutan kering.
Co-Authors Agung Pratama Al-Gburi, Ahmed Jamal Abdullah Al-Obaidi, Aymen Dheyaa Khaleel Fahmi, Saidul Ibrahim, Imran Mohd Irwati, Dwi Khabba, Asma Saputra, Hanif Zahriladha Zakaria