A wideband reflectarray antenna using single‐layer dipole element attached with T‐shaped stubs. Issue 8 (1st April 2019)

• Record Type: Journal Article
• Authors: Guo, Lu; Yu, Huiting; Che, Wenquan; Yang, Wanchen
• Is Part Of: International journal of RF and microwave computer-aided engineering. Volume 29:Issue 8(2019)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2019-04-01
• Subjects: dipole element -- reflectarray antenna -- single layer -- T‐shaped stubs -- wideband; Microwave devices -- Computer-aided design -- Periodicals; Computer-aided engineering -- Periodicals; 621.3813
• DOI: 10.1002/mmce.21755
• Languages: English
• ISSNs: 1096-4290

Abstract

Abstract: A wideband reflectarray antenna consisting of single‐layer dipole element attached with T‐shaped stubs is proposed. By varying the lengths of the T‐shaped stubs, the unit cell can provide a linear phase curve covering about 420°. Critical design parameters are analyzed to understand its wideband operating mechanism. Using this novel type of unit cells, a 441 element 25° offset‐fed reflectarray with grid spacing of λ /3 at 10 GHz is designed, fabricated, and measured. The experimental results show that the proposed reflectarray can achieve 1‐dB gain bandwidth of 24% and 1.5‐dB gain bandwidth of 37%. In addition, aperture efficiency of 66.6% and cross polarization level of 29 dB are obtained at 10 GHz, respectively.