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All Journal Jurnal Nasional Teknik Elektro dan Teknologi Informasi
Hanafi Amri
Department of Electrical Engineering, Faculty of Science and Technology, Universitas Islam Sultan Syarif Kasim Riau, Pekanbaru, Riau 28293, Indonesia
Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering

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Design of C-band Microstrip Antenna Using U-Slot and Defected Ground Structure Fitri Amillia; Hanafi Amri; Teddy Purnamirza; Hasdi Radiles
Jurnal Nasional Teknik Elektro dan Teknologi Informasi Vol 15 No 3: Agustus 2026
Publisher : This journal is published by the Department of Electrical and Information Engineering, Faculty of Engineering, Universitas Gadjah Mada.

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jnteti.v15i3.23947

Abstract

Microstrip antennas are widely used in wireless communication systems because of their lightweight nature, compact size, and ease of fabrication. However, this type of antenna has inherent limitations, such as narrow bandwidth and low gain. To address these shortcomings, this study proposed a microstrip antenna operating in the C-band frequency range by applying a U-slot technique on the patch and a dumbbell-shaped DGS on the ground plane. The U-slot technique was used to enhance bandwidth, while the dumbbell-shaped defected ground structure (DGS) improved impedance matching and overall antenna characteristics without increasing antenna size. The antenna design process used analytical calculations for both the single-element and 1 × 4 array configurations, followed by three-dimensional full-wave electromagnetic simulations and fabrication on an FR-4 substrate. The antenna was measured using a vector network analyzer (VNA) to obtain the S-parameters. Simulation results showed that the 1× 4 array design achieved a return loss of -46.53 dB, a bandwidth of 376 MHz, a voltage standing wave ratio (VSWR) of 1.01, and a peak gain of 8.49 dBi. Measurement results indicated a return loss of -17.50 dB, a bandwidth of 480.81 MHz, and a VSWR of 1.31 at 5.4875 GHz. These results demonstrate that integrating the U-slot and dumbbell DGS effectively improves antenna performance. Overall, the proposed antenna meets the required specifications and shows potential for weather radar applications as a receiving antenna operating in the C-band front-end system.
Co-Authors Fitri Amillia Hasdi Radiles Teddy Purnamirza