CPW-fed Circular Patch Antenna with Rectangular Slot-Loaded DGS for Wideband Application

Authors

  • Mohamad Faiz Mohamed Omar Universiti Teknologi Malaysia
  • Asrulnizam Abd Manaf
  • Prof. Dr. Mohd Fadzil Ain
  • Prof. Dr. Sharul Kamal Abdul Rahim Wireless Communication Centre (WCC), Faculty of Electrical Engineering, Universiti Teknologi Malaysia, UTM, Skudai, Johor 81310, Malaysia

DOI:

https://doi.org/10.11113/elektrika.v24n1.590

Keywords:

Coplanar waveguide, wideband, FR4 board, slot-loaded DGS

Abstract

In this paper, a wideband circular patch antenna incorporated with a rectangular slot-loaded defective ground structure (DGS) is presented, meant for n77, n78, n79, and C band applications. The circular radiation patch of the proposed antenna is fed by a coplanar waveguide (CPW) mounted on a FR4 PCB board. At the bottom side of the board, a rectangular slot loaded on the DGS is added to establish good 50 Ω impedance matching and improve the antenna impedance bandwidth. This wideband antenna excites TM11 and higher-order TM21 modes at two distinct frequencies (3.3 GHz and 6.0 GHz). This circular patch antenna exhibits wideband behaviour with a fractional bandwidth > 90%, and an average efficiency of 76%.

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Published

2025-04-29

How to Cite

Mohamed Omar, M. F., Asrulnizam Abd Manaf, Ain, M. F., & Abdul Rahim, S. K. (2025). CPW-fed Circular Patch Antenna with Rectangular Slot-Loaded DGS for Wideband Application. ELEKTRIKA- Journal of Electrical Engineering, 24(1), 7–13. https://doi.org/10.11113/elektrika.v24n1.590

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Section

Articles