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A novel “Z-shaped” antenna optimized for RFID 860960MHz and 4G 2.3–2.4 GHz is presented. The antenna is printed on paper substrate, providing the advantages of being lightweight, conformal, flexible and environmentally friendly. The proposed approach could enable the efficient data bundling of RFID-enabled wireless sensors utilizing the high-data-speed of 4G technologies. It could provide the basis...
This paper consists in a unified and comparative presentation of various scattering load-modulated systems. This generic designation covers different conceptual approaches, which are based on the same scattering mechanisms. Until now, these approaches have been rather separately conducted. Possible synergy opportunities are analysed in view of microwave sensing applications of practical relevance...
Electrically small antenna formed by planar loop with a “shell” of three concentric split loops with the relative outer size ka = 0.40 has been designed with complex input impedance Zin ~ 22 + j195 Ω to be used as UHF RFID tag antenna. The “shell” of concentric loops increases the total current path length so that it reaches the length about 1.08 λ0 at 869 MHz. The measured radiation and antenna efficiency...
The technology of Radio Frequency Identification (RFID) has been used to speed up the tracking process as well as to increase the efficiency of the product management process in various industries. In developing RFID solution, the core of all the questions is how to design high performance and suitable RFID tags for practical applications. However, since RFID tags are directly attached to objects,...
New design of a dipole antenna with H-shaped slot at two operating bands for Radio Frequency Identification (RFID) is presented. By using an H-shaped slot over a rectangular patch at the middle associated with four T-shaped slot, the proposed antenna has a wide and dual measured return loss bandwidth. Besides, the omnidirectional radiation pattern of the antenna cover the entire frequency range including...
Three prototypes of the very low-profile TAG antennas for UHF RFID of people were designed, as result of the long-term development. Their performance properties from the wearability point of view were step-by-step improved. The height were decreased from 1.82 to 0.76 mm (0.0022 λ0 at 869 MHz). The weight were decreased from 38 to 10 g, The gain of antennas measured with enclosed human phantom is in...
In this paper, the design, development and performance of a miniaturized multipurpose dual band planar antenna is discussed. This dual band antenna is destined to work on two UHF RFID bands, which are, 433MHz and the European RFID band (865MHz–868MHz). The main objective to design such an antenna was to have an antenna design having a small size, with an omni-directional radiation pattern with a reasonable...
In recent years, RFID (radio frequency identification) systems are widely developed. There are many types of RFID tag and each tag is used for suitable application. The wristband type RFID tag is one of the applications for personal identification. In case an RFID tag is used close to a human, the human body affects the characteristics of the RFID antenna. In this paper, a reflector-loaded antenna...
In this article, tag and reader multi-standards RFID antennas are presented. These antennas are matched on one the UHF RFID regulate frequency band (860–960 MHz) and on the ECC UWB frequency band (6–8.5 GHz). Tag is composed of two antennas, one match for the RFID applications with classical RFID input impedance, one for UWB matched at 50 Ω. Tag sizes are limited to credit card sizes (85×54 mm). Reader...
A capacitively loaded planar inverted F antenna (PIFA) for a portable RFID application is presented. The antenna consists of four parts: a ground plane, a rectangular radiator with cut slots, an excited stub, and a shorting pin on the right-hand side that connects the ground plane to the rectangular radiator. The excited stub and the rectangular radiator are forms capacitive coupling. The capacitive...
The ability to determine the position of a device in outdoor or indoor environments is becoming the foundation for an ever increasing number of a diverse set of services. This paper demonstrates the implementation of a very low-cost localization and device tracking system on top of a Wireless Sensor Network (WSN) topology. Its major components, namely the mobile RFID prototype, the fixed wireless...
In this paper a new metal-mountable RFID tag antenna with the highest read-range-to-volume ratio of all commercially available tags is described. The antenna is designed for an Alien H3 chip and represents a small printed loop antenna (37×7×3.2 mm3) with matching elements integrated into its structure. Two embodiments for monoband and dual band applications described in the paper show a read range...
The resonance frequency and bandwidth of the proposed active and passive antenna are about 434 MHz (260 MHz ~ 600 MHz) and 900 MHz (850 MHz ~ 960 MHz), respectively. The measured return loss and radiation pattern matched the result of calculation well. The measured readable range of tag antenna with car bumper which contained the poly urethane was approximately 8.5 m.
This work presents the design of an antenna for UHF RFID tags for supply and retail market working on different substrates. This antenna is based on the principle of broadband and frequency independent antenna like spiral antenna, which in free space simulation has a reflection coefficient less than −7.5 dB over US UHF RFID frequency band. Material's effects on impedance matching and reading range...
In this paper, a low-profile dipole type passive UHF radio frequency identification (RFID) tag antenna used in the UHF band is presented. The proposed antenna is anti-symmetrical about the origin and consists of meandered lines and two metal plates. The measured maximum read range of the proposed tag antenna is 6.5 meters at 915MHz. The proposed tag antenna size is 25 mm by 65 mm, and the operating...
This paper presents a dual band RFID tag antenna combining HF (13.56MHz) and UHF (860MHz-960MHz) operations. This antenna has two differential feeding points, the firt one for UHF chip impedance matching and the second on for chip/antenna HF resonance.
A loop antenna with phase shifters is proposed for ultra-high frequency (UHF) near-field radio frequency identification (RFID) readers. Using stub phase shifters, the solid-line loop antenna is capable of generating strong and uniform magnetic field in a near-field zone even though the perimeter of the loop is electrically large. Based on this design concept, a square loop antenna with a perimeter...
The design of an ad-hoc network of readers for a complex RFID system in large areas requires the deployment of a large number of readers due to the limited range of reader-tag communication. For passive tags the factors affecting the performance of the reader-tag communication depends on many physical and geometrical parameters. Line of sight is a constraint of the reader-tag link while scattering...
This paper presents several applications of multiobjective optimization to antenna design, emphasizing the main general steps in this process. Specifications of antennas usually involve many conflicting objectives, related to directivity, impedance matching, cross-polarization and frequency range. These requirements induces multiobjective problems, which are formulated, solved and analyzed here for...
Starting from the physical evidence that passive RFID systems may be used as self-sensing devices, the feasibility of human monitoring by means of implanted tags is here investigated. The sensing capabilities, the backscattering contrast and the communication link are analyzed considering a specific medical application, i.e. the continuous monitoring of brain edema evolution in patients neurosurgery...
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