Synthesis of circle-polarized planar array antennas to produce near-field contoured patterns

Abstract

In recent years, the RFID technologies have greatly developed. This paper presents the application of the algorithm SDM to near-field circular polarized planar array antennas to get a kind of radiation field which has an area of 0.5m×0.5m and attenuates rapidly at other place on a plane. This plane is 1.5m away from the aperture. Basically, we use Fortran to program to get the phases of all array elements to make it. The antenna works on 2.4GHz and can be used as the near-field antenna of the RFID reader.