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One of the biggest challenges for antenna designers is to design an RFID tag antenna for use on a metallic object. In this paper we present a slotted slim RFID tag antenna for metallic applications. The proposed design contains two coplanar rectangular metallic patches which are electrically connected to ground plane through conducting vias. Induct...
Citations
... Mo and Qin used an open stub feed patch antenna [7]. Lee 43 and Yu presented a similar structure with lateral notches intro-44 duced into the patch edges [8]. Another solution is to use via-45 shorted patches with inductive notches introduced into the patch 46 edges and direct chip feeding [9]. Chen and Tsao [10] The authors used an excitation dipole in a superstrate layer over 56 a shorted-patches antenna, and slots placed in the vicinity of the 57 radiation slot of a shorted-patches antenna [12]. ...
We introduce a low-profile platform-tolerant UHF radiofrequency identification (RFID) tag antenna composed of a pair of three-step impedance sections of shorted patches coupled by a slot, which is differentially fed by an RFID chip. Its input impedance is analytically investigated using transmission line (TL) modeling. A further set of parametric studies using electromagnetic simulation shows good flexibility for achieving the required complex input impedance for typical UHF RFID chips. The selected antenna topology has been manufactured and measured, and good agreement with the analytical values has been found.
A printed inverted-F antenna for RFID tag at 5.8 GHz is designed in this paper. The antenna structure consists of an inverted-F patch, a substrate layer, and a ground plane. To reduce costs, the FR4 is selected as the material of substrate layer, which is used commonly in PCB (Printed Circuit Board). Its relative permittivity is 4.4 and a loss tangent is 0.02. The inverted-F patch and ground plane are laid on/under the substrate layer respectively. The designed antenna is modeled, simulated and optimized by using HFSS (high frequency electromagnetic simulation software). Simulation results demonstrate that the printed inverted-F antenna can satisfy the requirements of RFID Tag applications.
Designing an RFID tag and placing it at an appropriate position, are both strongly responsible for proper functioning of the tag. In this article we present a study on the performance of three different UHF RFID tags placed on metallic cylinders of different radii. One of them is printed dipole antenna, the second one is a commercial tag (Alien 9540-02 squiggle UHF RFID tag), and the third one is a tag specifically designed for use on metallic objects. The measured results show that a tag placed along the axis of cylinder performs better than the tag placed around the surface of cylinder.
