A compact broadband microstrip slot circularly polarized antenna using parasitic elements. Issue 5 (4th July 2022)

• Record Type: Journal Article
• Authors: Wang, Lei; Chen, Jingxin; Zhang, Rui; Cheng, Liye
• Is Part Of: Electromagnetics. Volume 42:Issue 5(2022)
• Page Start: 368
• Page End: 376
• Publication Date: 2022-07-04
• Subjects: Broadband antenna -- Circularly polarized antenna -- Slot antenna; Electromagnetism -- Periodicals; 537
• DOI: 10.1080/02726343.2022.2118421
• Languages: English
• ISSNs: 0272-6343

Abstract

ABSTRACT: A new broadband circularly polarized (CP) microstrip slot antenna (MSA) is proposed in this study. The proposed CP MSA is comprised of a square-loop feed configuration, four rectangular patches as parasitic patches, and a square ground plane etched with four L-shaped slots as parasitic slots. The square-loop feed configuration, which can stimulate a 270° phase difference, comprises an arc-shaped strip and a square-loop. Rectangular patches and L-shaped slots as parasitic elements are together arranged and etched at the side of the square-loop feed configuration to excite multiple CP resonant modes using a capacitively coupled feeding technology. A prototype of the proposed antenna was simulated, manufactured, and measured in this study. The measured results depict that the CP MSA features a wide impedance bandwidth of 4.36–5.36 GHz (20.6%) for|S11 | < −10 dB and broad axial ratio bandwidth (ARBW) of 4.53–5.30 GHz (15.7%) for AR < 3 dB. Thus, the proposed CP MSA would be an outstanding candidate in wireless communication systems.