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题名: A Novel Single-Layer Unit Structure for Broadband Reflectarray Antenna
作者: Han, Chunhui; Yunhua Zhang(张云华); Yang, Qingshan
作者部门: 微波遥感部
通讯作者: Han, CH (reprint author), Chinese Acad Sci, Natl Space Sci Ctr, Key Lab Microwave Remote Sensing, Beijing 100190, Peoples R China.
关键词: Bandwidth enhancement ; phase-delay lines ; reflectarray antenna ; single-layer unit cell
刊名: IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS
ISSN号: 1536-1225
出版日期: 2017
卷号: 16, 页码:681-684
收录类别: SCI ; EI
英文摘要: A novel X-band single-layer unit-cell structure with enhanced bandwidth for linearly polarized microstrip reflectarray antenna is proposed. The unit-cell structure is composed of two circular rings, each with a pair of gaps that are orthogonally placed, and two identical phase-delay lines attached to the outer circular ring. With this novel structure, a linear phase response ranging about 550 degrees is achieved by varying the length of the phase-delay line. An offset-fed reflectarray antenna composed of 277 elements forming an octagon-shape aperture is designed, fabricated, and measured to verify the broadband characteristic of the proposed unit cell. Measurement results show that 20% 1-dB gain bandwidth is realized. Moreover, the maximum gain at 10 GHz is about 26.38 dBi, which means about 51.3% efficiency is achieved. At the same time, the sidelobe level and cross polarization for E-plane are also measured which are below -17.5 and -26 dB, respectively.
语种: 英语
内容类型: 期刊论文
URI标识: http://ir.nssc.ac.cn/handle/122/5838
Appears in Collections:微波遥感部_期刊论文

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