The design, and experimental validation of a single layer, transmit-receive reflectarray antenna (RA) to operate over a wide uplink and downlink frequency range of fixed satellite service is reported in the paper. The RA element is constructed using concentric circular patches with square slots etched on TLY 5 substrate backed by the metallic ground. A gradual increase in the radius of the rings offer the necessary 360° phase variation with reduced slope at uplink resonant frequency (14.25 GHz) and at downlink resonant frequency (11.8 GHz). Using the phase compensation cycles calculated for the 961 elements of the RA, an optimized distribution of the uplink and downlink elements is made on its square aperture (12.7 mm × 12.7 mm). A measured gain of 25 dBi and 26.5 dBi is obtained at 14.25 GHz and 11.8 GHz respectively. The 1 dB gain bandwidth is observed as 11 % between 13.75–14.50 GHz (Uplink) and 19 % in the 10.95 to 12.7 GHz (Downlink) range. The patterns obtained from the measurements indicate a good side lobe level of −14 dB and −13.5 dB at the uplink and downlink resonant frequencies. Similarly, a good discrimination between the orthogonal polarizations is measured at the two bands. Hence the proposed antenna with its enhanced radiation performances befits the transmission and reception of video and data in satellite communication.

本文报告了单层发射-接收反射阵列天线 (RA) 的设计和实验验证，该天线可在固定卫星服务的宽上行链路和下行链路频率范围内运行。RA 元件采用同心圆形贴片构建，该贴片在金属地面支持的 TLY 5 基板上蚀刻有方形槽。环半径的逐渐增加提供了必要的 360° 相位变化，并在上行链路谐振频率 (14.25 GHz) 和下行链路谐振频率 (11.8 GHz) 处减小了斜率。利用计算出的RA 961个单元的相位补偿周期，在其方形孔径（12.7 mm×12.7 mm）上进行上下行单元的优化分布。在 14.25 GHz 和 11.8 GHz 处测得的增益分别为 25 dBi 和 26.5 dBi。在 13.75–14.50 GHz（上行链路）范围内观察到1 dB增益带宽为 11%，在 10.95 至 12.7 GHz（下行链路）范围内为 19%。从测量中获得的模式表明，上行链路和下行链路谐振频率处的旁瓣电类似地，在两个频带处测量了正交偏振之间的良好区分。因此，所提出的天线具有增强的辐射性能，适合卫星通信中视频和数据的传输和接收。