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 ...
