univ. perugia - roma torvergata - siena: rfid rfid a microonde e ad onde millimetriche g. marrocco...

Univ. Perugia - Roma TorVergata - Siena: RFID

RFID a microonde e ad onde millimetriche

G. MarroccoUniv. Roma Tor Vergata

A. ToccafondiUniv. di Siena

M. Mongiardo, R. SorrentinoUniv. di Perugia


RFID system components

• The main RFID system components are the following: Tag, Reader and a Communication Software

• RFID systems permit the long distance identification of objects through the insertion of an identifier usually called “Tag” or “Transponder”. The Tags are read and written through a device called “Reader” or “Interrogator”


Why RFIDs will be important ?

Past: Information processed on isolated computers.

Present: INTERNET- information processed on computer networks.

Future: RFID - information (& sensors) stored also on OBJECTS and shared with computer networks via wireless communications.


Typical Applications


RFId Market

Total RFID market in trade in countries if the EU-15, in millions of items [Sore 04]


RFID & Electromagnetics


Research topics for EM

RFID impedance matching Miniaturization of tag antenna Printable tag design and analysis Multi-band tags (to comply different regulations worldwide) Application-specific antennas (e.g. for low-temperature

biologic samples management) Integration of antennas and objetcs (e.g. a metallic case used

as antenna)

Location technologies RFID and USN system (ubiquitous sensor networks) Retrodirective arrays (scanning reader and retrodirective tags) Use of higher frequencies (mm-waves) (adv: smaller

dimensions, higher directivity) RFID with MEMS switches


RFId - tag placed nearby a metallic object

Univ. of Perugia

A standard dipole placed near a metallic plate does not radiate!

The dipole antenna has to be modified in order to provide good

characteristics also in presence of metal surfaces


Univ. of Perugia

RFId - research

RADIATION RADIATION PATTERNPATTERN: : 0 deg. plane and 90 0 deg. plane and 90 deg. planedeg. plane

RETURN LOSS RETURN LOSS in free-space and in free-space and when the structure is affixed to a when the structure is affixed to a metallic planemetallic plane (object) (object) of variable of variable sizesize: : matching in a range of more matching in a range of more than 200 MHz in all casesthan 200 MHz in all cases ((ADS ADS softwaresoftware))

M. Mongiardo, M. Patassini, R. Sorrentino, C. Tomassoni, R. Vincenti GattiM. Mongiardo, M. Patassini, R. Sorrentino, C. Tomassoni, R. Vincenti Gatti ,

2.45 GHz Folded Dipole Antenna Design for RFID Applications: a Numerical Investigation, FACE 2006 Victoria2.45 GHz Folded Dipole Antenna Design for RFID Applications: a Numerical Investigation, FACE 2006 Victoria

M. Mongiardo, M. Patassini, R. Sorrentino, C. Tomassoni, R. Vincenti GattiM. Mongiardo, M. Patassini, R. Sorrentino, C. Tomassoni, R. Vincenti Gatti ,

Analisi di antenne a dipolo ripiegato a 2.45 GHz per applicazioni RFID, RiNEm 2006, GenovaAnalisi di antenne a dipolo ripiegato a 2.45 GHz per applicazioni RFID, RiNEm 2006, Genova

Sergio Bovelli, PhD Thesis, Sergio Bovelli, PhD Thesis, Antennas for RFID Systems: Design, Characterization and Special ApplicationsAntennas for RFID Systems: Design, Characterization and Special Applications

Relatore:Prof. Roberto SorrentinoRelatore:Prof. Roberto Sorrentino

PRIN 2006 - Università di Ancona, Bologna, Lecce, Perugia –PRIN 2006 - Università di Ancona, Bologna, Lecce, Perugia –

Array retrodirettivi per RFID a onda millimetrica (MMID)…?Array retrodirettivi per RFID a onda millimetrica (MMID)…?


Miniaturization of tag antennas

self-matched meander-line antennas (MLA)

G. Marrocco, A. Fonte, F. Bardati, "Evolutionary Design of Miniaturized Meander-Line Antennas for RFID Applications", IEEE AP-S 2002, Vol.2, pp.362-365, San Antonio (USA), 2002.

G. Marrocco, "Gain-optimized self-resonant meander line antennas for RFID applications", IEEE Antennas and Wireless Propagation Letters, vol.2, pp.302-305, 2003.

Automatic optimization techniques for MLA design

• Gain-optimized tag

• Effect of the tag material loss (PEC, copper, polymer)

• Conjugate matching

• MLAs over non-planar surfaces

ConformalMLA tag

870 MHz

: power transmission coefficient (antenna microchip)

Tor Vergata

University of Roma


RFId Sensor NetworksReal-time bio-monitoring and

localization

2-3m7-11m

3-5m

4-6m

SensorInterrogator

Network

Processing

• Tag attached onto the human body and equipped with bio-sensors (temperature, blood pressure, heart-beat).

• Tag ID and bio-signals wireless transmitted to a remote processing node

Design of on-body RFID tags suited to host sensors and electronics

Nested-slot suspended-patch

tag

• G. Marrocco, C. Stifano, "Tag Rfid passivi biocompatibili della banda UHF", Riunione Nazionale di Elettromagnetismo (RINEM), Genova 2006

• G. Marrocco, “Body-matched antennas for wireless biometry”, European Conference on Antennas and Propagat, Nice 2006

• G. Marrocco, “Rfid antennas for the UHF remote monitoring of Human Bodies”, submitted to IEEE Trans. Antennas Propagat. 2006

Body-tag visible region

Sensors &Battery

Tor Vergata

University of Roma


RFId - Hf and Uhf systems

Access control and payment systems Feasibility study and prototyping activity for an

access control system based on HF-ISO 15693 (13.56 MHz) Standard. (Confederazione Autostrade S.p.A – 2003).

Tagx

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y0 0.10.20.30.40.50.60.70.80.9 1 1.21.31.40

123456789

1011121314

distanza [m]

ten

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V]

passive loop

Dual-Band uniplanar antenna for passive RFID transponder (collab. with UNI-FI).

868 MHz 2.45 GHz

Univ. of Siena


RFId - Uhf passive systems

Compact antenna for multistandard TAGs Development of a compact UHF antenna for RFID

transponder. (Confederazione Autostrade S.p.A – 2005).

Introduction of load bars to improve complex matching with reduced size.

ls

d

l

p

g2

g 1

x

y

z

f (MHz)840 850 860 870 880 890 900

-30

-25

-20

-15

-10

-5

0

dB

(S11

)

No load barshorizontal bar onlyWith load bars

Prototyping and measurements.

1 2 3 40

10

20

30

40

50

60

70

80

90

100

M axim um reading range - 4 W att

W ithout D ipo leW ith D ipole

point

Re

ad

ra

ng

e (

cm)

• A. Toccafondi, P. Braconi “Compact Load-Bars Meander Line Antenna for UHF RFID Transponder”, European Conference on Antennas and Propagat, Nice 2006

• A. Toccafondi, P. Braconi, “Compact Load-Bars Meander Line Antenna for UHF RFID Applications”, submitted to IEEE AWPL.. 2006

Univ. of Siena

univ. perugia - roma torvergata - siena: rfid rfid a microonde e ad onde millimetriche g. marrocco...

Documents

rfid rfid tag

rfid rfid hf

rfid antennas

rfid applications

rfid rfid system components

applicazioni rfid

body rfid tags

rfid information sensors