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Muslim , Muslim
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The Design of Microstrip Antenna Using DGS and Series Parasitic Methods for C-Band Applications in Satellite Communications Rusdiyanto, Dian; Muslim , Muslim; Astuti , Dian Widi; Adhiyoga , Yohanes Galih; Apriono , Catur
JOURNAL OF INFORMATICS AND TELECOMMUNICATION ENGINEERING Vol. 8 No. 2 (2025): Issues January 2025
Publisher : Universitas Medan Area

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31289/jite.v8i2.12695

Abstract

This research proposes the design of a microstrip antenna for satellite communication that operates at C-Band frequency. The antenna is made of FR4 material with a thickness of 1.6 mm and has a permittivity of 4.4. The target C-Band frequency that can operate is in the range of 3.7 GHz - 8 GHz. To achieve this wide bandwidth, the defected ground structure (DGS) method is used which cuts the ground area under the substrate. Furthermore, to increase the antenna gain, the method of adding parasitic elements arranged in series (series parasitic) located at the top of the patch. The antenna design begins by designing the antenna in the DGS model and adding three parasitic elements where the basic shape of the parasitic elements has the same dimensions as the antenna patch. Then the development is created using a quarter of the patch dimensions which are added with nine parasitic elements. The simulation results show that the antenna with nine parasitic elements has an antenna bandwidth of 5.292 GHz in the range of 3.214 GHz - 8.506 GHz, where the maximum gain obtained is 8.6 dBi. While the development of an antenna with nine parasitic quarter-size patches has a bandwidth of 6.126 GHz in the frequency range of 3.344 GHz - 9.47 GHz with a maximum gain of 8.04 dBi. Therefore, it can be concluded that this research that designs antennas with the DGS method and series parasitic can operate at C-Band frequencies and can be applied to satellite communications.
Cultivating Pancasila Learner Profiles: Exploring Bung Hatta’s Virtues of Courtesy Through Inspirational Stories in Indonesian Primary Schools Effendi, Heri; Muslim , Muslim; Wirnita, Wirnita; Aisyah, Siti; Khairi , Ashabul
Journal of Educational Sciences Vol. 10 No. 1 (2026): Journal of Educational Sciences
Publisher : FKIP - Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jes.10.1.p.1789-1802

Abstract

This study explores the development of Pancasila student profiles by highlighting Bung Hatta's noble values in terms of manners through inspirational stories in Indonesian elementary schools. As one of the founders of the Indonesian nation, Bung Hatta exemplifies moral values that are in line with the goals of character building embedded in the national education curriculum. This study aims to analyze how his stories can serve as effective pedagogical tools in instilling polite behaviors-an important aspect of the first and second principles of Pancasila among young learners. Qualitative descriptive methods were used to collect and analyze data from classroom observations, teacher interviews, and document reviews in several elementary schools in West Sumatra. The results indicate that integrating Bung Hatta's life story into classroom instruction significantly improved students' understanding and internalization of values related to manners such as respect, humility, and social responsibility. Teachers also reported that the use of local historical figures increased students' engagement and cultural pride. This study concludes that character education based on national role models such as Bung Hatta not only strengthens Pancasila values but also makes moral learning more relevant and impactful for elementary school students.
Co-Authors Adhiyoga , Yohanes Galih Catur Apriono Dian Widi Astuti, Budi Irawan Prima Putra, Dian Widi Astuti, Effendi, Heri Khairi , Ashabul Rusdiyanto, Dian Siti Aisyah Wirnita, Wirnita