Wideband circularly polarised antenna based on tightly coupling effect. Issue 7 (1st March 2017)

• Record Type: Journal Article
• Authors: Yang, Long; Zhang, Zhi‐ya; Wu, Dan; Fu, Guang; Yan, Zehong
• Is Part Of: Electronics letters. Volume 53:Issue 7(2017)
• Page Start: 448
• Page End: 450
• Publication Date: 2017-03-01
• Subjects: broadband antennas -- dipole antennas; wideband circularly polarised antenna -- tightly coupled dipoles -- impedance transforming networks -- wideband feeding network -- mutual coupling -- coupled dipole elements -- bandwidth 1.7 GHz to 5.2 GHz -- bandwidth 2.0 GHz to 4.5 GHz -- bandwidth 2.6 GHz to 4.6 GHz -- loss 10 dB -- gain 3 dB; Electronics -- Periodicals; 621.381
• DOI: 10.1049/el.2017.0229
• Languages: English
• ISSNs: 0013-5194

Abstract

Abstract : A new design of a circularly polarised antenna based on the tightly coupled mechanism is presented. The proposed antenna consists of four tightly coupled dipoles, four impedance transforming networks and a wideband feeding network. Owing to the strong mutual coupling between coupled dipole elements, the proposed antenna realises a wide operating bandwidth. A prototype is manufactured and measured to validate the method. The measured results indicate that the proposed design provides a 10 dB return loss bandwidth of 101% (1.7–5.2 GHz) and a 3 dB axial ratio bandwidth of 77% (2.0–4.5 GHz). The design has a 3 dB gain bandwidth of 56% from 2.6 to 4.6 GHz with a peak gain of 10.4 dBic. Acceptable agreements can be obtained between the simulated and measured results.