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This paper presents a compact 2-port circularly polarised MIMO antenna for advanced RADAR applications. To guarantee constant circular polarisation, the suggested antenna has a unique ground structure, Z-shaped radiating elements, and a micro strip line-fed design. To further enhance port-to-port isolation, it includes a winding U-shaped metallic strip between the elements. The antenna provides reliable circular polarization over key radar bands with an axial ratio bandwidth of 32.10% (4.42–6.11 GHz) and a broad impedance bandwidth of 90.94% (3.04–8.11 GHz). The design’s tiny size of 24 × 24 × 1.6 mm3 makes it ideal for radar platforms with limited room. Strong performance and robustness are crucial diversity metrics. Validation of the design using full-wave simulations with CST Microwave Studio and measurement confirmation show excellent agreement for Radar system integration.

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High-Gain Antenna Array Architecture for Next-Generation Radar Target Discrimination

  • 会议论文

  • 发表日期：

    2026年

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  • T. M. Usha,
  • P. Valli Rani,
  • C. H. Lakshmi,
  • S. Siva Krishna,
  • V. Soundarya,
  • Baker Karim

摘要

This paper presents a compact 2-port circularly polarised MIMO antenna for advanced RADAR applications. To guarantee constant circular polarisation, the suggested antenna has a unique ground structure, Z-shaped radiating elements, and a micro strip line-fed design. To further enhance port-to-port isolation, it includes a winding U-shaped metallic strip between the elements. The antenna provides reliable circular polarization over key radar bands with an axial ratio bandwidth of 32.10% (4.42–6.11 GHz) and a broad impedance bandwidth of 90.94% (3.04–8.11 GHz). The design’s tiny size of 24 × 24 × 1.6 mm3 makes it ideal for radar platforms with limited room. Strong performance and robustness are crucial diversity metrics. Validation of the design using full-wave simulations with CST Microwave Studio and measurement confirmation show excellent agreement for Radar system integration.