UHF频段双面扫描读写器天线阵设计

In this paper,a two-dimensionally (2-D) scanning beam RFID reader antenna array with two-shorting-plate inverted-F antenna is designed and characterized for UHF RFID application. A two-shorting-plate planar invented-F antenna (TPIFA) structure on FR4 substrate reduces the size of antenna. The whole size of 3×3-element antenna array is 30cm×30cm×15mm. The measured resultes show that the array covers Europe standard of 845-873 MHz frequency range with more than 10dB input return loss and up to ±60 beam scanning with 10dBi gain at E-plane and H-plane, respectively. The proposed antenna array is a effective way for RFID tag reading accuracy and localization range improvement of the RFID system.