一种近场聚焦直线阵列天线的设计及探究

Design of Microwave Interference Focusing Antenna and Measurement of Focusing Distribution

设计了一种近场聚焦直线阵列天线,并从电磁波中的干涉角度实现在近场范围内的空间聚焦,通过验证并分析了这种阵列天线的空间范围内的聚焦情况.实验从电磁波的干涉角度出发,首先让频率为2450 MHz,波长为12.45 cm的微波,通过一个内衬有可以吸收和防止微波扩散的金属网的波导管,测量波导管内的电磁波在没有圆形反射片的阻挡情况下传输情况.在得知了电磁波在波导管中的传输情况后,根据分析的位置放置圆形反射片.并确定圆形反射片的位置,再根据圆形反射片的透过情况确定反射片偏转的最佳角度.最后测量在长120 cm、宽50 cm,高20 cm空间范围内的聚焦分布情况.通过测量并分析可知利用干涉聚焦的方法设计的近场聚焦直线阵列天线在进场空间范围内取得了很好的聚焦效果.

In this paper,a near-field focusing linear array antenna is designed,and the spatial focusing in the near-field range is realized from the interference Angle of electromagnetic wave.Finally,the spatial focusing of this array antenna is verified and analyzed.Starting from the interference Angle of electromagnetic waves,the experiment first let the microwave with a frequency of 2450MHz and a wavelength of 12.45cm pass through a waveguide lined with a metal net that can absorb and prevent microwave diffusion to measure the transmission of electromagnetic waves in the waveguide without the obstruction of circular reflectors.After the transmission of electromagnetic wave in the waveguide is known,the circular reflector is placed according to the position of analysis.The position of the circular reflector is determined,and the optimal deflection Angle of the circular reflector is determined according to the transmittance of the circular reflector.Finally,the focal distribution is measured within 120cm long,50cm wide and 20cm high.Through measurement and analysis,it can be seen that the near一field focusing linear array antenna designed by interference focusing method achieves a good focusing effect within the approach space.