Univ. Perugia - Roma TorVergata - Siena: RFID RFID a microonde e ad onde millimetriche G. Marrocco Univ. Roma Tor Vergata A. Toccafondi Univ. di Siena.

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Univ. Perugia - Roma TorVergata - Siena: RFID RFID a microonde e ad onde millimetriche G. Marrocco Univ. Roma Tor Vergata A. Toccafondi Univ. di Siena M. Mongiardo, R. Sorrentino Univ. di Perugia

Univ. Perugia - Roma TorVergata - Siena: RFID 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

Univ. Perugia - Roma TorVergata - Siena: RFID 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.

Univ. Perugia - Roma TorVergata - Siena: RFID Typical Applications

Univ. Perugia - Roma TorVergata - Siena: RFID RFId Market Total RFID market in trade in countries if the EU-15, in millions of items [Sore 04]

Univ. Perugia - Roma TorVergata - Siena: RFID RFID & Electromagnetics

Univ. Perugia - Roma TorVergata - Siena: RFID 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

Univ. Perugia - Roma TorVergata - Siena: RFID 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. Perugia - Roma TorVergata - Siena: RFID Univ. of Perugia RFId - research RADIATION PATTERN: 0 deg. plane and 90 deg. plane RETURN LOSS in free-space and when the structure is affixed to a metallic plane (object) of variable size: matching in a range of more than 200 MHz in all cases(ADS software) RETURN LOSS in free-space and when the structure is affixed to a metallic plane (object) of variable size: matching in a range of more than 200 MHz in all cases (ADS software) M. Mongiardo, M. Patassini, R. Sorrentino, C. Tomassoni, R. Vincenti Gatti M. 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 Victoria M. Mongiardo, M. Patassini, R. Sorrentino, C. Tomassoni, R. Vincenti Gatti M. 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, Genova Sergio Bovelli, PhD Thesis, Antennas for RFID Systems: Design, Characterization and Special Applications Relatore:Prof. Roberto Sorrentino PRIN Università di Ancona, Bologna, Lecce, Perugia – Array retrodirettivi per RFID a onda millimetrica (MMID)…?

Univ. Perugia - Roma TorVergata - Siena: RFID 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 , San Antonio (USA), G. Marrocco, "Gain-optimized self-resonant meander line antennas for RFID applications", IEEE Antennas and Wireless Propagation Letters, vol.2, pp , 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 Conformal MLA tag 870 MHz : power transmission coefficient (antenna microchip) Tor Vergata University of Roma

Univ. Perugia - Roma TorVergata - Siena: RFID RFId Sensor Networks Real-time bio-monitoring and localization 2-3m 7-11m 3-5m 4-6m Sensor Interrogator 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 Body-tag visible region Sensors & Battery Tor Vergata University of Roma

Univ. Perugia - Roma TorVergata - Siena: RFID RFId - Hf and Uhf systems Access control and payment systems Feasibility study and prototyping activity for an access control system based on HF-ISO (13.56 MHz) Standard. (Confederazione Autostrade S.p.A – 2003). Tag x z y Dual-Band uniplanar antenna for passive RFID transponder (collab. with UNI-FI). 868 MHz 2.45 GHz Univ. of Siena

Univ. Perugia - Roma TorVergata - Siena: RFID 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. l s d l p g 2 g 1 x y z f (MHz) dB(S 11 ) No load bars horizontal bar only With load bars Prototyping and measurements. 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 Univ. of Siena