60-GHz Electronically Reconfigurable Large Reflectarray Using Single-Bit Phase Shifters
60-GHz Electronically Reconfigurable Large Reflectarray Using Single-Bit Phase Shifters
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DOI：
10.1109/tap.2011.2152338
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发表时间：
2011-07-01
影响因子：
5.7
通讯作者：
Hashimoto, Osamu
中科院分区：
文献类型：
--
作者：
Kamoda, Hirokazu;Iwasaki, Toru;Hashimoto, Osamu
一个大型的电子可重构反射阵列天线，具有160 × 160的反射元件的设计，制造和评估，使它可以应用于毫米波成像系统工作在60 GHz频段。为了使它可行地构建这样一个大的反射阵列，反射元件的结构必须是简单的，易于控制的，因此，反射元件组成的微带贴片和一位数字移相器使用的p-i-n二极管。利用该反射单元制作了一个大型反射阵列天线。测量的辐射方向图和天线增益与计算结果吻合良好。此外，还通过实验验证了近场物体成像所需的近场光束聚焦能力。最后，测量了波束形成的响应时间，其远小于系统要求。
A large electronically reconfigurable reflectarray antenna that has 160 X 160 reflecting elements was designed, fabricated, and evaluated so that it could be applied to a millimeter-wave imaging system operating in the 60-GHz band. To make it feasible to construct such a large reflectarray, the reflecting element structure had to be simple and easily controlled; therefore, a reflecting element consisting of a microstrip patch and a single-bit digital phase shifter using a p-i-n diode was employed. A large reflectarray antenna was fabricated using the reflecting elements. The measured radiation patterns and antenna gain were in good agreement with those that were calculated. Furthermore, the near-field beam focusing capabilities, which was required to image near-field objects, were also verified through an experiment. Finally, the response time for beamforming was measured, which was far less than the system requirements.