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The reading range of a tag antenna usually decreases markedly as the antenna size decreases, because of the antenna's reduced gain. This letter describes the use of circular polarization to reduce the size of a tag antenna without decreasing its reading range. This approach resulted in a 33 × 33‐mm antenna with a substrate thickness of 4 mm that maintained reading ranges of about 3 m for the antenna...
In this paper, a novel tag antenna is proposed; it has a very simple structure that does not require a ground plane or shorting pins. The proposed tag antenna has significant advantages over other types of tag antennas for metallic objects, such as low cost, light weight, and ease of fabrication. The body of the antenna is printed as a single planar strip line on a thin PET substrate (polyethylene,...
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