A new class of wideband microstrip falcate patch antennas with reconfigurable capability at circular‐polarization. Issue 12 (18th July 2020)

• Record Type: Journal Article
• Authors: Shirkolaei, M. Mohammadi; Jafari, M.
• Is Part Of: Microwave and optical technology letters. Volume 62:Issue 12(2020:Dec.)
• Page Start: 3922
• Page End: 3927
• Publication Date: 2020-07-18
• Subjects: circular polarization -- falcate‐shaped patch -- L‐probe -- reconfigurable antenna; Microwaves -- Periodicals; Optics -- Periodicals; 621
• DOI: 10.1002/mop.32529
• Languages: English
• ISSNs: 0895-2477

Abstract

Abstract: A new wideband microstrip antenna, based on the falcate‐shaped patch, with reconfigurable capability at circular‐polarization is presented in this article. To achieve both properties of stable radiation characteristics and impedance matching across a broad bandwidth, the combination of the L‐probe feeding and falcate‐shaped patch is used. An RF‐switch is utilized to excite the L‐probes and generate either left‐hand circular polarization or right‐hand circular polarization over the wide operating bandwidth. A prototype of the proposed antenna is fabricated. An excellent agreement exists between the simulation and measurement results. The results reveal a wide impedance matching (| S 11 | < − 10 dB ), bandwidth of 55% (1.42‐2.5 GHz), and a 3 dB axial ratio bandwidth of 44% (1.6‐2.5 GHz). Furthermore, results confirm good radiation and impedance matching performance of the fabricated antenna over the wide bandwidth in comparison with previous related investigations. The reported reconfigurable antenna can be used as a suitable choice for GPS, ISM band, or RFID applications