Circularly polarized transmitarray antenna design using meander line polarizer for ku-band applications

• Main Authors: Iqbal, M. N., Yusoff, M. F. M., Rahim, M. K. A., Hamid, M. R., Johari, Z., Hamood, U. R.
• Format: Article
• Language: English
• Published: Institute of Electrical and Electronics Engineers Inc. 2021
• Subjects: TK Electrical engineering. Electronics Nuclear engineering
• Online Access: http://eprints.utm.my/id/eprint/95577/1/MuhammadNaeemIqbal2021_CircularlyPolarizedTransmitarray.pdf; http://eprints.utm.my/id/eprint/95577/; http://dx.doi.org/10.1109/ACCESS.2021.3107531

In this paper, a circularly polarized Transmitarray antenna design for the Ku-band frequency range is presented. The transmitarray antenna with 121 elements is designed using a four-layer double square ring with a center patch unit cell. The Unit cell parametric analysis shows a high transmission coefficient magnitude of -1.26 dBi and a wide phase range of 256 degrees. A meander line polarizer is designed at 12GHz to convert the polarization from linear to circular. This meander line polarizer is placed in front of the horn antenna as a superstrate layer. The final measurement results show a high gain circular polarized TA antenna with a maximum gain of 20.17dBic and a value of 1.89 for the axial ratio is achieved at 11.2 GHz. The 1dB antenna gain and 3-dB axial ratio bandwidth are calculated as 0.65GHz and 1.07GHz, respectively. The proposed design offers a low profile and less complex structure, making it suitable for long-range communication systems, especially in Ku band applicatio