loading page

Low-profile broadband circularly polarized heterogeneous dipole antenna with backed cavity
  • +1
  • Min Han,
  • Yifeng Qin,
  • Chengzi Wang,
  • Tianqi Yang
Min Han
Institute of Systems Engineering, Academy of Military Sciences
Author Profile
Yifeng Qin
Peng Cheng Laboratory

Corresponding Author:[email protected]

Author Profile
Chengzi Wang
National Innovation Institute of Defense Technology, Academy of Military Sciences
Author Profile
Tianqi Yang
Beijing Aerohydrodynamic Research Center
Author Profile


A broadband heterogeneous circularly polarized (CP) dipole antenna with a backed cavity is presented in this letter. The proposed antenna consists of a pair of rotational symmetric short-circuited heterogeneous branches and a Γ-shaped feed structure. Each branch is designed to be axe-shaped so that the antenna can achieve a broad 3dB axial ratio (AR) bandwidth. The coupled feeding method assures the antenna is wideband, and the shorting-to-the-ground technique miniaturizes the lateral dimensions of the antenna. The profile of the proposed antenna is around 0.16λL (λL denotes the wavelength of the lower bound frequency). The introduction of a back cavity effectively enhances the boresight gain and improves the isolation level if the antenna is used to form an array. Finally, the design is prototyped, and the measurement results agree well with the simulation. The fractal -10 dB S11 bandwidth and 3dB AR bandwidths are 54.3% (2.74-4.78 GHz) and 45.9% (3.15-5.03 GHz), respectively. The antenna’s efficiency exceeds 91.5% over the target frequency band.
20 Apr 2023Submitted to Electronics Letters
20 Apr 2023Submission Checks Completed
20 Apr 2023Assigned to Editor
02 May 2023Reviewer(s) Assigned
06 May 2023Review(s) Completed, Editorial Evaluation Pending
09 May 2023Editorial Decision: Revise Minor
09 Jul 20231st Revision Received
12 Jul 2023Submission Checks Completed
12 Jul 2023Assigned to Editor
12 Jul 2023Review(s) Completed, Editorial Evaluation Pending
14 Jul 2023Reviewer(s) Assigned
19 Jul 2023Editorial Decision: Accept