Ultrawideband Bowtie Slot Antenna With Defected Ground Structure

Authors

  • Richard S. W. Ting School of Electrical and Electronic Engineering, Engineering Campus Universiti Sains Malaysia, Nibong Tebal 14300, Malaysia
  • Intan S. Zainal Abidin School of Electrical and Electronic Engineering, Engineering Campus Universiti Sains Malaysia, Nibong Tebal 14300, Malaysia
  • Azniza Abd Aziz Intel Microelectronics Penang 11900, Malaysia

DOI:

https://doi.org/10.13052/2024.ACES.J.400703

Keywords:

Bowtie slot antenna, defected ground structure, ultrawideband antenna

Abstract

An ultrawideband (UWB) antenna is well-suited for several applications, particularly in wireless communications, radar and sensing systems. A UWB antenna covering 1.8 GHz to 3.8 GHz is proposed in this research work. A study was conducted on a bowtie slot antenna with different combinations and shapes of defected ground structure (DGS). Different shapes of DGS were introduced to investigate the effects of DGS on the bandwidth, reflection coefficient and radiation performance of the antenna. For the bowtie slot antenna with partial ground and circular DGS, there are three resonant frequencies with lowest S11 at 2.0 GHz (-18.5 dB), 2.5 GHz (-36.5 dB) and 3.3 GHz (-41.5 dB), while the antenna design with partial ground and dumbbell DGS has resonant frequencies at 2.0 GHz (-18.5 dB), 2.5 GHz (-36.5 dB) and 3.3 GHz (-44 dB). Upon adding a DGS structure such as a circle or dumbbell on the ground plane, the bandwidth performance of the proposed antenna was significantly enhanced. The radiation efficiency of the proposed antenna reached 80% and the directivity was 4.17 dBi (2.0 GHz), 5.58 dBi (2.5 GHz) and 5.18 dBi (3.3 GHz).

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Author Biographies

Richard S. W. Ting, School of Electrical and Electronic Engineering, Engineering Campus Universiti Sains Malaysia, Nibong Tebal 14300, Malaysia

Richard Sing Wee Ting was born in Sibu, Sarawak, Malaysia, in 1996. He received the B.Eng. Degree in Electronic and Electronic Engineering from University Malaysia Sabah in 2020. His work focuses on microstrip antenna.

Intan S. Zainal Abidin, School of Electrical and Electronic Engineering, Engineering Campus Universiti Sains Malaysia, Nibong Tebal 14300, Malaysia

Intan Sorfina Zainal Abidin received her Ph.D. in Electronics Engineering from 5G Innovation Centre (5GIC), University of Surrey, Guildford, UK, in 2017. She has industrial experience working as an engineer at Motorola Solutions (M) and Celestica (M). Currently, she is a Senior Lecturer at the School of Electrical and Electronic Engineering, Universiti Sains Malaysia (USM), specializing in electronics communication system, antenna, channel propagation, RF, microwave engineering and MIMO systems. Intan is a member of IEEE.

Azniza Abd Aziz, Intel Microelectronics Penang 11900, Malaysia

Azniza Abd Aziz received the Ph.D. degree in electrical engineering from the University of South Carolina, Columbia, SC, USA. She is currently with Intel Corporation, Penang, Malaysia. Her current research interests include signal integrity solutions for high-speed digital design, machine learning, RF, and microwave engineering. Azniza is a Chartered Engineer (C.Eng.) conferred by the Engineering Council, UK.

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Published

2025-07-30

How to Cite

[1]
R. S. W. . Ting, I. S. Z. . Abidin, and A. A. . Aziz, “Ultrawideband Bowtie Slot Antenna With Defected Ground Structure”, ACES Journal, vol. 40, no. 07, pp. 591–600, Jul. 2025.

Issue

2025: Vol 40 Iss 7

Section

General Submission

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