A Passive Circularly Polarized Van Atta Reflector For Vehicle Radar Applications

作者：Miao Zhuo Wei; Hao Zhang Cheng^*; Yuan Quan

来源：IEEE Antennas and Wireless Propagation Letters, 2017, 16: 2254-2257.

DOI：10.1109/LANVP.2017.2711492

• Terms Circular polarization (CP)
• radar cross section (RCS)
• retrodirective antenna (RDA)
• substrate integrated coaxial line (SICL)
• Van Atta array
• vehicle application

This letter proposes a planar passive circularly polarized (CP) retrodirective antenna (RDA) array for vehicle radar applications. Different than the linearly polarized RDA arrays, the retrodirective signal generated by the CP RDA arrays can easily he extracted due to the orthogonal polarized character of the scattering and retrodirective signals. Circular polarization is achieved by a substrate integrated waveguide cavity-backed antenna. Moreover, the low-loss and nondispersive substrate integrated coaxial lines are employed as the feeding networks to expand the operating bandwidth for the large array. Measured results of bistatic and monostatic radar cross section verify the designed prototype, showing that the CP RDA array covers a scan angle of at least 30 from boresight without interference by sidelobes. The measured bandwidth of the retrodirective property is 24.85-25.45 GHz. The capability of CP retrodirectivity ensures that the proposed RDA array is a good candidate for short-range vehicle radio equipment.

• 出版日期2017
• 单位东南大学