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BROADBAND AND HIGH EFFICIENCY SINGLE-LAYER REFLECTARRAY USING CIRCULAR RING ATTACHED TWO SETS OF PHASE-DELAY LINES

By F. Xue, H. Wang, Y. Wang, and L. Zhang

Full Article PDF (1,078 KB)

Abstract:
A new single-layer element structure for broadband operation is presented. The element is composed of a circular ring attached two sets of phase-delay lines with the opposite direction of rotation. The demission of circular ring is fixed, and about 460° reflection phase range is achieved by varying the length of the phase-delay lines. Using the proposed element, a 381-element single-layer linearly polarized reflectarray is designed, fabricated and measured. A gain of 27.5 dB is measured at 13.58 GHz with 3-dB beamwidth of about 6.8°, and the corresponding aperture efficiency is 57.3%. Good radiation performances are also achieved at other frequencies. Measured results show 1.5-dB and 3-dB gain bandwidth of 47.8% (13.58-20.08 GHz) and 64% (12.08-20.78 GHz) with the center frequency of 13.58 GHz respectively, which demonstrates excellent broadband performance. Besides, high aperture efficiencies (more than 50%) are achieved in a wide frequency range (12.08-17.08 GHz). Low cross polarization and sidelobe levels are also achieved in the frequency band.

Citation:
F. Xue, H. Wang, Y. Wang, and L. Zhang, "Broadband and High Efficiency Single-Layer Reflectarray Using Circular Ring Attached Two Sets of Phase-Delay Lines," Progress In Electromagnetics Research M, Vol. 66, 193-202, 2018.
doi:10.2528/PIERM18010916

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