Broadband and high gain circularly polarised truncated corner square patch metasurface antenna using aperture CPW feed

Abstract

Broadband and the high gain circularly polarised antenna are designed in a single-layered planar substrate. An array of 3 × 3 truncated corner square patches are designed as a metasurface antenna on one side of the substrate and the metasurface antenna is fed by a stub-loaded uniform aperture CPW feed on another side of the substrate. In the metasurface antenna, the size of the central patch is increased for improving the bandwidth of impedance bandwidth and 3 dB axial ratio. Furthermore, the amount of truncation is reduced in the patches surrounding the central patch to enhance the bandwidth of impedance bandwidth and 3 dB axial ratio bandwidth. The designed metasurface antenna has achieved an impedance bandwidth of 38.2% (4.5–6.63 GHz) with an axial ratio bandwidth of 13% (5.0–5.7 GHz). Moreover, the antenna has a peak gain of 10.36dBic. The simulation and measurement results are compared.

KEYWORDS:

• CPW fed antennas
• metasurface
• high gain and broadband
• circular polarization
• truncated corner square patch

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Notes on contributors

Srinivas Guthi

Srinivas Guthi received his bachelor’s degree in Electronics and Communication Engineering from Jawaharlal Nehru Technical University, Andhra Pradesh, India in 2011 and his master’s degree in Communications Systems from the National Institute of Technology Allahabad, Uttar Pradesh, India in 2014 with a focus on MIMO antenna respectively. From 2014 to 2017, he worked as an assistant professor at Guru Nanak Institute of Technical campus, Telangana, India. Since Dec 2017, he is pursuing a Ph.D. degree in the area of high gain and wideband antennas at National Institute of Technology Warangal, Telangana, India. His research interests include high gain and broadband antennas, circularly polarised antennas, CPW fed aperture antennas, metasurface antennas, MIMO antennas, and FPC antennas.

Vakula Damera

Vakula Damera received the bachelor’s degree in electronics and communication engineering from Nagarjuna University, Andhra Pradesh, India, and the master’s degree in tech from the Birla Institute of Technology, Mesra, India, with a focus on microwave specialisation in 1992 and 1994, respectively, and the Ph.D. degree in fault diagnostics of antenna arrays from the National Institute of Technology, Warangal, India, in 2010. She has been an Assistant Professor with the National Institute of Technology since 2006. She has authored 31 papers in international conferences and journals. Her areas of interests include phase array antennas, ultra wideband antennas, multiband antennas, fault diagnostics, and neural network.