Microwave single pixel imaging front end device

The invention discloses a microwave single pixel imaging front end device which comprises an imaging diffraction lens, a mask plate, a diffraction lens, a sensor feed-source horn and an electromagnetic wave lighting horn, wherein the mask plate comprises a PCB and a sub-wavelength metallic array arranged on the PCB, the sub-wavelength metallic array comprises a plurality of units, and resonant frequency of at least one unit is different with the same of other units. Since the mask plate comprises a plurality of resonant frequencies, the electromagnetic wave adopting only one mask plate can adapt a plurality of resonant frequencies and can obtain a plurality of measuring modes, the mask plate has no need to change, the device has simple structure, and the cost is low. 本发明公开了种微波单像素成像前端器件，包括成像衍射透镜、掩膜板、衍射透镜、传感器馈源喇叭和电磁波照明喇叭，其中，掩膜板包括PCB板和制作在PCB板上的亚波长金属阵列，亚波长金属阵列包括多个单元，至少有个单元的谐振频率与其他单元的谐振频率不同。由于掩膜板具有多个谐振频率，因此，只采用这块掩膜板就可以适应多种频率的电磁波得到多个测量模式，不需要更换掩膜板，器件结构简单，成本低。