A linearly polarized single-layer single-resonator reflectarray, which is designed using a simple circular patch loaded with two unequal rectangular slots, is investigated for the first time. For the proposed design, the linearity and sensitivity of the phase curve (S-curve) can be easily optimized by adjusting the ratio of the two unequal slots changeable according to a simple design equation. Here, the patch radius serves as a phase-shifting geometrical parameter and it is able to achieve a wide phase range of more than 458° with low phase sensitivity and a low reflection loss of less than 0.5 dB. With the use of the optimized phase curve, an offset-fed 13 × 13 full-fledged reflectarray with a square aperture is designed, fabricated and measured. Measurement results show that a −1-dB gain bandwidth of 11.8% and an antenna gain of 23.4 dBi are realizable at the center frequency of 9.3 GHz. Also, the proposed reflectarray has an aperture efficiency of 42% and a radiation efficiency of 98%. The proposed reflectarray has a simple structure and it is able to achieve smooth phase curve, low cross-polarized radiation field and low sidelobes.

首次研究了线性极化单层单谐振器反射阵列，该阵列是使用装有两个不相等矩形槽的简单圆形贴片设计的。对于所提出的设计，可以通过根据一个简单的设计方程调整两个可改变的不相等缝隙的比率，轻松地优化相位曲线（S曲线）的线性和灵敏度。在此，斑片半径用作相移几何参数，并且能够以低相位灵敏度和小于0.5 dB的低反射损耗实现大于458°的宽相位范围。利用优化的相位曲线，设计，制造和测量了具有方孔径的偏置馈电13×13全反射镜。测量结果表明，-1dB的增益带宽为11.8％，天线增益为23。在9.3 GHz的中心频率下可实现4 dBi。而且，所提出的反射阵列具有42％的孔径效率和98％的辐射效率。所提出的反射阵列具有简单的结构，并且能够实现平滑的相位曲线，低的交叉极化辐射场和低的旁瓣。