摘要
针对现有微波感应器产品探测天线增益低,抗干扰能力差,难以准确探测狭窄空间内的用户的运动状态等问题,设计了一款具有四阵元的微带直线阵列天线。天线的工作频率在X波段,采用改进的矩形微带贴片作为阵元,优化了天线的半功率波束宽度(HPBW),减小了辐射贴片的面积。通过HFSS对天线进行整体建模分析,阵元间采用不等幅谐振式串馈法进行馈电,降低了阵列天线副瓣电平。最终仿真结果表明该阵列天线最大增益为11.8 dB,归一化副瓣电平低于-25 dB,天线的三维辐射特性图为扇形。相比微波感应器常用探测天线,E面HPBW增加了37.4%,H面HPBW缩小了70.0%。能形成狭长探测面,成本低、易于加工,可作为微波感应器的探测天线,具有一定的实用工程价值。
In order to solve problems of low gain,poor anti-interference ability and difficult to detect motion state of users accurately at narrow space,a microstrip linear array antenna with four elements was designed.The working frequency of the antenna was in the X-band.The improved rectangular microstrip patch was used as the element to optimize Half-Power Beamwidth(HPBW)of the antenna and reduce the of the radiation patch.The antenna was modeled and analyzed by HFSS,and the unequal-amplitude resonant series feed method was used for elements to reduce sidelobe level of antenna.The simulation result shows that maximum gain of antenna array is 11.8 dB,the normalized sidelobe level is below-25 dB,and three-dimensional radiation characteristic of antenna is a sector.Compared with the common detection antenna of microwave sensor,the E-plane HPBW increases by 37.4%and the H-plane HPBW decreases by 70.0%.It can be used at a long and narrow detection area with low cost and easy processing,and has certain practical engineering value.
作者
夏燕超
王彦
郭灵
Xia Yanchao;Wang Yan;Guo Ling(College of Electrical Engineering,University of South China,Hengyang,Hunan 421001,China)
出处
《机电工程技术》
2022年第4期85-88,共4页
Mechanical & Electrical Engineering Technology
