A thin RAIN UHF RFID reader antenna with a 135 x 135 x 3mm appearance and only 3mm thickness, which increases the efficiency of installation and is suitable for embedding in a limited space. A circularly polarized omnidirectional radiation field pattern can provide no direction limit, and excellent RAIN RFID tag reading performance, it is suitable for applications that need to hide the antenna, such as applications embedded in a machine or placed on a table. It can be applied to RFID product tracking applications and suitable scenarios are production line workstations, smart shelves, and smart checkout counters.
