A Simple dual-band quasi-Yagi antenna with defected ground structures

Turan G., Odabaşı H.

TURKISH JOURNAL OF ELECTRICAL ENGINEERING AND COMPUTER SCIENCES, vol.30, no.1, pp.158-166, 2022 (SCI-Expanded) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 30 Issue: 1
  • Publication Date: 2022
  • Doi Number: 10.3906/elk-2104-165
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Applied Science & Technology Source, Compendex, Computer & Applied Sciences, INSPEC, TR DİZİN (ULAKBİM)
  • Page Numbers: pp.158-166
  • Keywords: Dual-band antennas, quasi-Yagi, planar antennas, defected ground structure (DGS)
  • Eskisehir Osmangazi University Affiliated: Yes


In this article, a dual-band compact quasi-Yagi antenna with defected ground structure (DGS) is proposed. The proposed antenna has a simple feeding mechanism consists of a microstrip and transmission line. Half of the driver and director elements are printed on the opposite side of the substrate to ensure good coupling between the antenna elements and achieve a stable radiation pattern. The ground plane is modified with one rectangular slot below the microstrip line to form dual-band operation. Also rectangular slots placed on the sides of the ground plane to improve the matching. The proposed antenna works at f(1) = 3.35 and f(2) = 6.15 GHz, respectively. The antenna efficiency is above 88% at f(1) and 78% at f(2) with bandwidths of 11.8% and 9.7%, respectively. The realized gain is around 4.3 dBi at both frequency range with an end-fire radiation characteristics. An excellent agreement is observed between the simulation and measurement results. The proposed antenna is suitable for dual-band operations in wireless communications systems.