Home > Published Issues > 2024 > Volume 19, No. 3, 2024 >
JCM 2024 Vol.19(3): 168-174
Doi: 10.12720/jcm.19.3.168-174

Study on Defected Ground Structure Models with Miniaturized Patches for Broadband Wireless Systems

Yus Natali1,*, Riva Irvana2, Yudiansyah2, Dian Widi Astuti3, Dwi Astuti C.4, and Catur Apriono5
1.Telecommunication Engineering, Faculty of Applied Sciences, Universitas Telkom, Jakarta Barat, Indonesia
2.Telecommunication Engineering, Faculty of Electrical Engineering, Universitas Telkom, Jakarta Barat, Indonesia
3.Department of Electrical Engineering, Universitas Mercubuana, Jakarta Barat, Indonesia
4.Department of Electrical Engineering, Universitas Muhammadiyah Prof. Dr. HAMKA, Jakarta, Indonesia
5.Department of Electrical Engineering, Faculty of Engineering, Universitas Indonesia, Depok, Indonesia
Email: yusnatali@telkomuniversity.ac.id (Y.N.); rivairvanaa@student.telkomuniversity.ac.id (R.I); yosijuliana@telkomuniversity.ac.id (Y.J); yudiansyah@telkomuniversity.ac.id (Y.A); dian.widiastuti@mercubuana.ac.id (D.W.A); dwi.cahyasiwi@uhamka.ac.id (D.A.C); catur@eng.ui.ac.id (C.A)
*Corresponding author

Manuscript received July 20, 2023; revised October 20, 2023, accepted December 7, 2023; published March 26, 2024.

Abstract—This study presents a Defected Ground Structure (DGS) mechanism and improves its antenna properties. Three DGS models are discussed: two including a single antenna and one including an array microstrip antenna design. The microstrips are designed for broadband wireless frequencies of 2.1 GHz (5G Technology) for a single antenna, and 5.8 GHz (wireless local area network) for an array antenna. These frequencies are achieved using three shapes of DGS in the simulations and the results are suitable for broadband applications. The antenna patches are rectangular with two types of DGS, and an array circular with one type of DGS. The results show the DGS provides better bandwidth and gain for a single antenna. Nevertheless, DGS achieves gain enhancement for an array antenna and this design yields a miniaturized array antenna of 69.92% and 73.47% in width and length, respectively. The three shapes of DGS have different designs: rectangular patch antenna with frame-shaped DGS, rectangular antenna with rectangular slot-shaped DGS, and array circular antenna with rectangular slots of DGS. A rectangular patch antenna with frame-shaped DGS and an array circular antenna with rectangular slots of DGS yields bandwidths of 533 MHz and 327 MHz. The single antenna improves the fractional bandwidth by 25.38% with a miniaturized patch. Nonetheless, the array circular antenna with DGS obtains a gain enhancement of 16 dB greater than the initial array without DGS.

Keywords—microstrip antenna, defected ground structure, resonant frequency, impedance bandwidth, gain, miniaturized patch

Cite: Yus Natali, Riva Irvana, Yosi Juliana, Yudiansyah, Dian Widi Astuti, Dwi Astuti C., Catur Apriono, “Study on Defected Ground Structure Models with Miniaturized Patches for Broadband Wireless Systems," Journal of Communications, vol. 19, no. 3, pp.  168-174, 2024.

Copyright © 2024 by the authors. This is an open access article distributed under the Creative Commons Attribution License (CC BY-NC-ND 4.0), which permits use, distribution and reproduction in any medium, provided that the article is properly cited, the use is non-commercial and no modifications or adaptations are made.