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Low-Profile Wideband Reflectarray by Novel Elements With Linear Phase Response

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4 Author(s)
Qing-Yong Chen ; Sch. of Electron. Eng., Univ. of Electron. Sci. & Technol. of China (UESTC), Chengdu, China ; Shi-Wei Qu ; Xiang-Qian Zhang ; Ming-Yao Xia

This letter presents a reflectarray antenna composed of a combination of concentric open rings and an I-shaped dipole on a conductor-backed substrate. Two classes of elements with different variable dimensional parameters are introduced to realize linear phase-frequency characteristic in a wide frequency band and a phase range of over 360° . It is worth noting that the wideband performance is figured by the proposed reflectarray with a low profile of 0.065λ0 ( λ0 is the free-space wavelength at the center frequency), rather than thick substrate employed in common wideband designs. A prototype is fabricated and measured to verify the availability of the elements, and the measured results show good agreement with simulations.

Published in:

Antennas and Wireless Propagation Letters, IEEE  (Volume:11 )