Design of reconfigurable circularly polarised double folded inverted‐L antenna with rectangular ground plane using HFSS. Issue 5 (22nd September 2020)

• Record Type: Journal Article
• Authors: Praveen Kumar, Padakandla Chenna; Trinatha Rao, Polipalli
• Is Part Of: IET networks. Volume 9:Issue 5(2020)
• Page Start: 229
• Page End: 234
• Publication Date: 2020-09-22
• Subjects: antenna radiation patterns -- impedance matching -- broadband antennas -- electromagnetic wave polarisation -- UHF antennas -- antenna feeds -- planar inverted‐F antennas -- planar antenna arrays; noise figure 3.0 dB -- noise figure 2.0 dB -- noise figure ‐32.16 dB -- frequency 2.39 GHz -- size 18.0 mm -- size 70.0 mm -- coaxial probe -- feeding configuration -- reconfigurable circularly polarised double folded inverted‐L antenna -- design concept -- circularly polarised antenna structure -- orthogonal elements -- circular polarisation -- double‐folded structure -- radiation characteristics -- double‐folded arms -- rectangular ground plane; Computer network architectures -- Periodicals; Computer network protocols -- Periodicals; Information networks -- Periodicals; Telecommunication systems -- Periodicals; 004.605
• DOI: 10.1049/iet-net.2019.0218
• Languages: English
• ISSNs: 2047-4954

Abstract

Abstract : A novel design of reconfigurable circularly polarised antenna is proposed and developed in the present work. The circularly polarised antenna consists of two linearly polarised inverted‐L antenna elements with double‐folded arms. To improve the impedance matching and radiation characteristics, the double‐folded structure plays a significant role. Circular polarisation is achieved by properly adjusting the lengths of two arms, quadrature currents can be produced on two orthogonal elements. The developed linearly polarised antenna elements are low‐profile and small in size, the circularly polarised antenna structure is minimised to be about 70 mm in length, 70 mm width and 18 mm in height (70 × 70 × 18 mm). The feeding configuration is simplified by using coaxial probe instead of an external polariser, better values are obtained between the theoretical calculations and simulated results, which validate the design concept. The designed reconfigurable circularly polarised double folded inverted‐L antenna is compared with twin inverted‐L shaped structure. The simulated results show that the circularly polarised antenna resonates at 2.39 GHz and has a wide impedance bandwidth of 6.00% S 11 with −32.16 dB and VSWR<2 and 3 dB axial ratio of 1.2 across the entire operating band.