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A microstrip patch antenna with bandwidth enhancement by means of artificial magnetic conductor (AMC)/electromagnetic band-gap structure (EGB) is presented. The electrical characteristics of the embedded structure are evaluated using MoM simulations. The manufactured prototypes are characterized in terms of return loss, gain, and radiation pattern measurements in an anechoic chamber.

A novel combination of coplanar waveguide (CPW)-fed double bow-tie slot antenna and artificial magnetic conductor (AMC), which meets the requirements of a 5.8-GHz SHF RFID tag antenna usable on metallic objects, is presented. The manufactured prototype is characterized in terms of return loss, gain, and radiation pattern measurements in an anechoic chamber, both alone and on a metallic plate.Index Terms-Antenna, artificial magnetic conductor (AMC), coplanar waveguide (CPW), radio frequency identification (RFID).

The design of a novel dipole-artificial magnetic conductor (AMC) combination for UHF radio frequency identification (RFID) band, showing proper performance in the proximity of metallic surfaces, surrounding a metallic can and being conformed around the human wrist is presented. The prototypes of the dipole antenna alone and dipole antenna combined with the AMC are manufactured using laser micromachining. To the authors' knowledge, this is the first letter presenting the actual functionality of antennas and AMCs at UHF RFID frequency in order to insulate the user's body from undesired exposure to electromagnetic radiation. The experimental results of the manufactured prototypes in terms of return loss and radiation pattern measurements in an anechoic chamber are shown for comparison.Index Terms-Artificial magnetic conductor (AMC), balance-to-unbalanced transformer, dipole antenna, radio frequency identification (RFID).