Investigation of UHF RFID tag backscatter

Johnson, Jay; Sainati, Robert

doi:10.1109/aps.2007.4396105

Cited by 8 publications

(5 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The tag antenna configuration over Carton box with length L carton , width W carton , height H carton , and thickness t carton , of simulated Carton material with ε r2 = 2 and tan δ = 0.04. the phase (PSK modulation). In the simulation the modulation is made by varying the real part (for ASK) or the imaginary part (for PSK) of the load impedance [28]. Figure 8(a) shows the radar cross section for the tag in free space against frequency.…”

Section: Numerical Resultsmentioning

confidence: 99%

Fractal Antenna for Passive Uhf Rfid Applications

Zainud-Deen¹,

Malhat²,

Awadalla³

2009

PIER B

View full text Add to dashboard Cite

Abstract-This paper addresses the design of fractal antennas placed onto dielectric object in the UHF RFID band and introduces a tag antenna configuration of simple geometry having impedance tuning capability. Through the paper, the dimensions of the fractal antenna are optimized to improve the impedance matching with the chip impedance. The tag performance changes are studied when it is placed on different objects (e.g., cardboard boxes with various content), or when other objects are present in the vicinity of the tagged object. It has been shown that a tag antenna can be designed or tuned for optimum performance on a particular object. Using the finite element method the open circuit voltage and the polarization mismatch factor against the operating frequency are calculated. The input impedance, reflection coefficient, power transmission coefficient and the read range as a function of frequency are illustrated. The performance of the tag antenna in the presence of the dielectric box and different object materials inside the box is illustrated. The effect of the objects that are placed in the center of the dielectric box didn't have a significant effect on the performance of the tag antenna; there is a small shift in the resonance frequency but still within the operating frequency band. Both the power transmission coefficient and the read range change with the object material. The backscattering properties of the tag antenna have been studied. The differential radar cross-section of the tag antenna is calculated for different antenna loads.Corresponding author: H. A. Malhat (er honida@yahoo.com). 210Zainud-Deen, Malhat, and Awadalla

show abstract

Section: Numerical Resultsmentioning

confidence: 99%

Fractal Antenna for Passive Uhf Rfid Applications

Zainud-Deen¹,

Malhat²,

Awadalla³

2009

PIER B

View full text Add to dashboard Cite

show abstract

“…[10] and [11] discuss about the antenna design for UHF RFID tag antennas for different types of tags. [12] and [13] presents a good explanation of the propagation of the backscatter signal in different kinds of environments with different values of propagation constants. This paper presents a new method of modeling a multi-hop RFID network in one-and two-dimensional cases using statistical analysis.…”

Section: Related Workmentioning

confidence: 97%

Multi-hop framework for battery-less devices using passive RF communication

Surendra

Zawodniok

2011

2011 IEEE Wireless Communications and Networking Conference

View full text Add to dashboard Cite

Typical wireless multi-hop networks employ active communication where RF signal is actively generated by a sending node. In contrast, backscatter communication modulates backscattered RF signal that requires significantly less energy to operate than the active one. This paper proposes a novel, multihop architecture for such backscatter-based communication that is not currently present in the literature. Such a system consists of a powerful reader and small, battery-less nodes. The reader generates the original RF signal, while the passive devices backscatter this signal to communicate among themselves thus enabling multihop transmission from far-away nodes. The paper presents the generic analysis of the system capabilities and demonstrates the feasibility of such multi-hop network. Also, it studies the connectivity models in terms of k-connectivity of such network with uniformly distributed tags.

show abstract

“…where λ is the wavelength, Pt is the power transmitted by the reader, Gt is the gain of the transmitting reader antenna, Gr is the gain of the receiving tag antenna, Pth is the minimum threshold power necessary to provide enough power to the RFID tag chip which is equal to -10 dBm in this case, p is the polarization mismatch factor and τ is power transmission coefficient. The radar cross section, RCS, can be altered by terminating the antenna with different load impedances, where the modulation depth of the RCS affects the tag reading range [16][17][18][19]. Generally the RCS of a tag antenna can be defined by…”

Section: Rfid Tag Analysismentioning

confidence: 99%

Curved Dual - Band Dielectric Resonator Tag Antenna for RFID Applications

Zauind-Deen

Malhat

Awadalla

2012

International Journal of Engineering Business Management

View full text Add to dashboard Cite

This paper presents a new application of dielectric resonator antenna in radio frequency identification system. A curved dual‐band dielectric resonator antenna for RFID applications is proposed. The tag antenna is designed to operate at 2.45 GHz (2.25‐ 2.55 GHz) and 5.8 GHz (5.65‐ 5.95 GHz) bands. The radiation characteristics of the tag antenna in free space are investigated. The radar cross sections under different loads are obtained. The effect of curvature on the tag antenna performance is explained. Two examples are considered. In the first example, the tag antenna is mounted on cylindrical bottle filled with the Polyethylene material. The effect of the object properties on the radiation characteristics and the radar cross section is investigated. In the second example, the tag antenna is mounted on spherical bottle filled with the Polyethylene material. The radiation and backscattering characteristics are calculated. The Finite Element Method (FEM) is used for simulation and the Finite Integration Technique (FIT) is used to verify the simulated results

show abstract

Investigation of UHF RFID tag backscatter

Cited by 8 publications

References 1 publication

Fractal Antenna for Passive Uhf Rfid Applications

Fractal Antenna for Passive Uhf Rfid Applications

Multi-hop framework for battery-less devices using passive RF communication

Curved Dual - Band Dielectric Resonator Tag Antenna for RFID Applications

Contact Info

Product

Resources

About