Article Per Year (5 Year)
p-Index From 2021 - 2026
0.659
P-Index
This Author published in this journals
All Journal Jurnal Pengabdian dan Edukasi Sekolah (Jubaedah) Jurnal Nasional Teknik Elektro dan Teknologi Informasi Jurnal Teknik Elektro
Mia Maria Ulfah
Institut Teknologi Sumatera
Computer Science & IT Control & Systems Engineering Education Electrical & Electronics Engineering Energy Engineering Languange, Linguistic, Communication & Media Mathematics Social Sciences Other

Published : 4 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 4 Documents
Search

 1 
PENGENALAN MEDIA PEMBELAJARAN DARING BERBASIS STEM UNTUK GURU IPA DI SMAN 9 BANDAR LAMPUNG Indah Oktaviani; Ika Agus Rini; Mia Maria Ulfah; Ahmad Dodi Andriana
Jubaedah : Jurnal Pengabdian dan Edukasi Sekolah (Indonesian Journal of Community Services and School Education) Vol. 1 No. 1 (2021): Jurnal Pengabdian dan Edukasi Sekolah (Jubaedah)
Publisher : LPPM Universitas Bina Bangsa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46306/jub.v1i1.16

Abstract

Meluasnya pandemi Covid-19 memaksa proses pembelajaran di sekolah dilakukan secara daring. Hal ini menuntut guru untuk lebih kreatif dalam menggunakan media pembelajaran yang berbasis teknologi agar pembejaran lebih interaktif terutama pada kondisi pandemi. Akan tetapi tidak banyak guru di sekolah yang menguasi perangkat lunak sebagai media pembejaran, sehingga perlu dilakukan pelatihan dalam pemanfaatan teknologi dalam Pembelajaran Jarak Jauh. Metode yang dilakukan antara lain perancangan dan persiapan yang meliputi survei terhadap kondisi guru dalam memanfaatkan media pembelajaran, pelaksanaan kegiatan, dan evaluasi. Hasil survei awal menunjukkan bahwa guru IPA masih sangat terbatas dalam memanfaatkan metode pembelajaran dengan perangkat lunak interaktif, sehingga dilakukan pelatihan dengan modul yang sudah disediakan dan perangkat lunak yang dapat mewakili pembelajaran IPA berbasis STEM dengan penggunaan Nearpod dan Laboratorium virtual simulasi PhET. Hasil Pelatihan menunjukkan adanya peningkatan pemahaman dan kreatifitas guru IPA dalam proses pembelajaran daring
Antena SIW dengan Defected Ground Structure pada Frekuensi L-Band Mia Maria Ulfah; Achmad Munir
Jurnal Nasional Teknik Elektro dan Teknologi Informasi Vol 9 No 2: Mei 2020
Publisher : Departemen Teknik Elektro dan Teknologi Informasi, Fakultas Teknik, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1094.459 KB) | DOI: 10.22146/jnteti.v9i2.122

Abstract

In this paper, a bandwidth enhancement technique for Substrate Integrated Waveguide(SIW) antenna is attempted using Defected Ground Structure(DGS)by modifying the shape and geometry of the slot on the ground plane. In order to achieve wide bandwidth response of the antenna, a rectangular split ring incorporated with across shapes lots are employed as DGS. The quality factor (Q) of antenna increases as the substrate thickness decreases, which leads to narrow down bandwidth response of the SIW antenna. Therefore, the SIW antenna is simulated using multiple layers of FR4epoxydielectric substrate in overcoming the problem. The SIW antenna has a dimension of 171 mm×160.5mm, 4.905mm-height,and is intended to work at the center frequency of 2 GHz. Furthermore, the SIW antenna is excited by proximity coupling method which is connected to a 50Ω connector. Simulation result shows that the 575 MHz bandwidth could be achieved by the antenna with the proposed technique, in which the -10dB bandwidth response is ranged from the frequency of 1.675 GHz –2.25 GHz and the maximum gain is6.03 dBi at the frequency of 1.85 GHz,with bidirectional radiation pattern.
Wideband Multi-Resonant Microstrip Patch Antenna for Wireless Communication Systems Mia Maria Ulfah; Rheyuniarto Sahlendar Asthan
Jurnal Teknik Elektro Vol. 17 No. 2 (2025)
Publisher : LPPM Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jte.v17i2.35545

Abstract

The increasing demand for high-performance wireless communication systems has driven the development of compact antennas that can support wideband operation, particularly in the 5 GHz frequency range. Microstrip patch antennas (MPAs) remain attractive for such applications due to their low profile and ease of integration, although achieving a wide impedance bandwidth remains a key challenge. This paper presents a low-profile MPA with a wideband response designed for the 5 GHz band of wireless communication systems. The proposed MPA is implemented on a single-layer FR-4 substrate with a thickness of 1.6 mm and is excited using a coaxial probe feed. To achieve a wide impedance bandwidth, a U-shaped patch is utilized as the primary radiator, complemented by a slot, a parasitic element, and a rectangular ring surrounding the main resonator, aiming to generate multiple resonant modes and improve impedance matching. The influence of each modification on antenna performance is systematically analyzed. To validate its performance, the proposed MPA is fabricated and measured, with the obtained results compared to the simulated ones. Simulation and measurement results show good agreement, confirming that the proposed MPA achieves a wideband response with a fractional bandwidth of 18.8% and a peak realized gain of 4.85 dBi. These results highlight the effectiveness of the proposed design and demonstrate its potential for compact and wideband wireless communication devices operating around 5 GHz frequency range.
Bandwidth Enhancement of Proximity-Coupled Patch Antenna Using Dual Open-Ended Ring-Shaped Slots for Sub-6 GHz Applications Rheyuniarto Sahlendar Asthan; Mia Maria Ulfah
Jurnal Teknik Elektro Vol. 18 No. 1 (2026)
Publisher : LPPM Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jte.v18i1.47475

Abstract

This paper presents a bandwidth enhancement of patch antenna intended for sub-6 GHz applications. A square-shaped radiating patch is configured on a double-layer FR-4 dielectric substrates with a dielectric constant of 4.3 and a total thickness of 3.2 mm. To improve the impedance bandwidth, the antenna is fed using proximity-coupling method, in which the microstrip feeding line and the ground plane are placed on the top and bottom layers of the second substrate. Dual open-ended ring-shaped slots are subsequently introduced and etched on the radiating patch element to further enhance the antenna bandwidth. Various slot structures are evaluated, and their physical parameters are varied in a parametric study to analyze their effect on antenna performance, particularly impedance bandwidth. The proposed antenna has a compact dimension of 0.38λ0×0.38λ0×0.06λ0 and exhibits wideband characteristics with a fractional bandwidth of 22.3%.
Co-Authors Achmad Munir Ahmad Dodi Andriana Ika Agus RINI Oktaviani, Indah Rheyuniarto Sahlendar Asthan