Investigation of Low-Profile RFID Antenna Using AMC Substrate for Anti-Metallic Application

Abstract

A low-profile radio frequency identification (RFID) tag antenna mounted on an artificial magnetic conductor (AMC) substrate is investigated for the anti-metal application. The AMC substrate consists of two rectangular patches and a metal ground, which is used to reduce the profile as well as enhance the insensitivity to the metal object. The anti-metal mechanism is studied through the near-field coupling behavior. The gain of final configuration is 4.1 dBi, and the total size is 130mm×60mm×3 mm.