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A Broadband Reflectarray Based on Vivaldi Antenna Elements

机译：基于VivalDi天线元件的宽带反射阵列

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摘要

In this paper, a novel broadband reflectarray (RA) is presented. For achieving broadband performance, the unit cell is realized using Vivaldi antenna element, where the feeding line acts as phase delay-line for adjusting the reflection phase. By simply changing the length of phase delay-line, a full 360o phase coverage is obtained. Additionally, the phase response curves are nearly parallel within a broad bandwidth, leading to a wideband operation. To verify this design, a prototype consisting of 10x22 unit cells is designed, fabricated and measured. The measured results show that the maximum gain reaches 21.50 dBi with 20.15% 1-dB gain bandwidth and 30.38% 3-dB gain bandwidth, respectively. Simulated and measured results agree very well with the proposed design scheme.
机译：本文提出了一种新颖的宽带反射阵列（RA）。为了实现宽带性能，使用VivalDi天线元件实现单位电池，其中馈线用作调节反射阶段的相位延时线。通过简单地改变相位延迟线的长度，获得完整的360O相位覆盖。另外，阶段响应曲线几乎平行于宽带宽，导致宽带操作。为了验证这种设计，设计，制造和测量由10x22单元电池组成的原型。测量结果表明，最大增益达到21.50 dBi，分别具有20.15％1-dB增益带宽和30.38％3-dB增益带宽。模拟和测量结果与所提出的设计方案非常吻合。

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