伸缩式全金属反射阵列扫描天线

提出了一种伸缩式全金属反射单元,在此基础上设计了一个可用于高功率微波领域的全金属反射阵列波束扫描天线。通过反射单元的上下独立滑动,阵列中每个阵元所接收电磁波的传输路径可改变,从而实现了相控波束扫描。由电磁仿真可知,设计的反射单元能够在10～13 GHz的频带范围内实现0～360°的线性相位调节,且可在15°～40°偏馈条件下相位调节时保持高功率容量。由该型单元组成的中心工作频率为10 GHz的伸缩式全金属反射阵列扫描天线具备90°锥角范围内的二维波束扫描能力,功率容量可达5 GW/m2。同时,在波束扫描过程中,天线增益变化小于3 dB,副瓣电平低于?13 dB,最大口径效率为54.59%。

Scalable all-metal reflective array beam scanning antenna

A scalable all metal reflective element is proposed in this paper, and an all-metal reflective array antenna for high power microwave application is also designed. By sliding the connecting rod up and down, the transmission path of the incident wave to each element can be changed to achieve the corresponding phase modulation. Thus, the beam scanning can be achieved. Simulation result shows that the unit can realize linear phase adjustment of 360° within 10?13 GHz and has a power handling capacity of 3 MW, which means the array can achieve 5 GW/m2 power handling capacity level after the formation (under vacuum condition). Under the standard of 3 dB gain variation, the antenna can realize a two-dimensional spatial beam scanning within the range of 90° revolving cone angle.