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This paper presented an RFID tag antenna which can be mounted on metallic surfaces in UHF band. The proposed antenna has a proximity-coupled feeding structure composed of a microstrip line shorted to the ground plane. We can almost independently control the real and imaginary part of the antenna impedance using the proposed feeding structure. Therefore, we can directly match the impedance of the antenna...
This letter presents the design of a small and low-profile RFID tag antenna in the UHF band that can be stuck to metallic objects. The designed tag antenna which uses a ceramic material as an antenna substrate consists of a radiating patch and microstrip lines for a proximity-coupled feeding structure, which is the structure that can easily obtain impedance matching between an antenna and a tag chip...
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