scholarly journals Far-Field Testing Method of Spurious Emission Produced by HF RFID

2016 ◽  
Vol 2016 ◽  
pp. 1-6 ◽  
Author(s):  
Nikola Gvozdenovic ◽  
Ralph Prestros ◽  
Christoph F. Mecklenbräuker
Keyword(s):  
Radio Frequency Identification ◽  
Dielectric Material ◽  
Field Testing ◽  
Analog Front End ◽  
Radiation Properties ◽  
Frequency Identification ◽  
Transverse Electromagnetic ◽  
Gtem Cell ◽  
Integrated Circuitry ◽  
Spurious Emission

We present measurements of spurious emission produced by high-frequency radio frequency identification (HF RFID) using carrier frequency of 13.56 MHz. HF RFID tags produce unwanted emission due to rectification and more generally due to nonlinearity of analog front end. Depending on the conducting material of an HF RFID coil and surrounding dielectric material, the coil behaves as more or less good antenna on some harmonic frequencies. Exact characterization and analysis of unwanted emission is important from the security perspective as well as from the perspective of interference with other systems. Consequently we measured the harmonics produced in the integrated circuitry and characterized radiation properties of the antenna. Finally we present the measurements of the spurious emission performed in a Gigahertz Transverse Electromagnetic (GTEM) cell.

scholarly journals Dual-Band Antenna/AMC Combination for RFID

2012 ◽  
Vol 2012 ◽  
pp. 1-7 ◽  
Author(s):  
M. E. de Cos ◽  
F. Las-Heras
Keyword(s):  
Radio Frequency ◽  
Radio Frequency Identification ◽  
Return Loss ◽  
Dual Band ◽  
Rfid Tags ◽  
Metallic Plate ◽  
Magnetic Conductor ◽  
Dual Band Antenna ◽  
Radiation Properties ◽  
Frequency Identification

A novel antenna/Artificial Magnetic Conductor (AMC) combination usable in dual-band Radio Frequency Identification (RFID) tags over metallic objects is presented. A compact and low thickness prototype is manufactured and characterized in terms of return loss and radiation properties in an anechoic chamber both alone and on a metallic plate. The performance exhibited by the presented antenna/AMC prototype is proper for RFID tags on both metallic and nonmetallic objects.

Design of a Novel Tag Antenna Mountable on the Side of Cigarette Carton

2012 ◽  
Vol 236-237 ◽  
pp. 970-975
Author(s):  
Qian Cao ◽  
Jian Xiong Li ◽  
Lu Hong Mao
Keyword(s):  
Radio Frequency Identification ◽  
Low Cost ◽  
Antenna Design ◽  
The Finite Element Method ◽  
Rfid Tag ◽  
Conductive Material ◽  
Radiation Properties ◽  
Frequency Identification ◽  
Rfid Applications ◽  
Read Range

The growing interest of Radio Frequency Identification (RFID) applications has seen problems emerging in the identification of object, especially those that contain conductive material. A low-cost novel tag antenna for a RFID tag which could be mounted on the side of cigarette carton is proposed in this paper. Since the cigarette carton contains conductive material, radiation properties of the antenna could be affected significantly. The specific parameters of the antenna were optimized based on the Finite Element Method (FEM). The performance of the tag antenna design affixed to the cigarette carton containing metallic foil is verified with read range measurements. The proposed antenna has a simulated bandwidth from 863 MHz to 943 MHz ( < -10 dB) for conjugate-matching with a commercial tag chip.

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