Design of a Broadband Dual-Beam Reflectarray Antenna with a Single Feed

Document Type : Original Article

Authors

1 PhD student, Hawadria University Complex, Malik Ashtar University of Technology, Tehran, Iran

2 Assistant Professor, Hawadaria University Complex, Malik Ashtar University of Technology, Tehran, Iran

3 Professor, Shiraz University, Shiraz, Iran

Abstract

This paper proposes a new method for the design of a broadband dual-beam reflectarray antenna with a single feed. This method is based on the producing a null in the antenna radiation pattern and the appearance of two beams. The reflection phase distribution on the aperture of the antenna has been studied to achieve this null. A single layer subwavelength element with multi-resonances is used as the phase shifting unit cell due to its wide linear phase range. A comprehensive theoretical analysis and full-wave simulation are accomplished and the results are in good agreement. Two dual beam reflectarray antennas operating at X band are designed using the proposed method and the geometrical method. The improvement in the gain bandwidth and the beam squint of the designed reflectarray using our proposed method is observed compared to the other one. The simulation results show the improvement of 1.1% in 1-dB gain bandwidth and in the beam squint for the proposed design method compared with the other one.

Keywords

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References

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Radar
Volume 9, Issue 2 - Serial Number 26
November 2022
Pages 79-88

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History

  • Receive Date: 18 November 2021
  • Revise Date: 14 January 2022
  • Accept Date: 01 October 2022
  • Publish Date: 22 November 2022

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