Circularly Polarized Transmitarray Antenna Design Using Meander Line Polarizer for Ku-Band Applications

• Published in: IEEE access 2021, Vol.9, p.119598-119612
• Main Authors: Iqbal, Muhammad Naeem, Yusoff, Mohd Fairus Mohd, Rahim, Mohamad Kamal A., Bin Hamid, Mohamad Rijal, Johari, Zaharah, Rahman, Hamood Ur
• Format: Article
• Language: English
• Subjects: Antenna design; Antenna gain; Antennas; Circular polarization; Communications systems; Design; Frequency ranges; frequency selective surface; Frequency selective surfaces; High gain; Horn antennas; meander line; Parametric analysis; Phased arrays; Polarization; Polarizers; Reflector antennas; Substrates; Superhigh frequencies; transmitarray; Transmitting antennas; Unit cell; Waveguide transitions
• ISSN: 2169-3536; 2169-3536
• DOI: 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 applications.