微波与光波分离聚焦集成透镜设计

Design of an integrated lens for separating microwave and optical wave

设计了一种由光学菲涅耳透镜和微波螺旋结构透镜组成的集成透镜,微波透镜实现对入射微波能量的聚焦,光学菲涅耳透镜实现对入射可见光聚焦.由于微波螺旋结构对入射光没有阻挡作用,同时光学菲涅耳透镜对微波传输影响很小,且所提出的微波与光波分离聚焦集成透镜可以在将微波与光波分离汇聚于不同位置,微波焦点与光波焦点横向距离为35cm,并在微波焦点处电场强度增强5倍.故加载此集成透镜后可以在充分利用入射可见光的基础上,实现对微波信号的发射和接收.

An integrated lens was designed, which is composed of an optical Fresnel lens （OFL） and a microwave helix array （MHA）. The OFL focuses the incident light wave while the MHA focuses on the incident microwave. The MHA has little effect on blocking incident light while the OFL has effect on microwave transmission. The proposed integrated lens can simultaneosly focus microwave and optical wave on two different spots, and the distance between them is 35cm. The intensity of the electric field has a 5- fold improvement at the microwave focus. So it can transmit and receive microwave signal on the basis of the full use of the incident visible light when the integrated lens is uploaded.