LCIS, 50 rue de Laffemas, BP 54, Valence Cedex 09, France

Transcription

1 LCIS, 50 rue de Laffemas, BP 54, Valence Cedex 09, France S. TEDJINI, IMS2011, Baltimore, June 2011

2 Outline Introduction Chipless RFID vs. RFID Coding Method Example High Coding Capacity Chipless activation for Sensing Simulation of Chipless based NTC Experimental Investigation with NM Concluding remarks S. TEDJINI, IMS2011, Baltimore, June 2011 Slide 2

3 Introduction Principle of communication by reflected power (H. Stockman) IFF application Commercial tag : EAS Numerous applications in various area : traceability, access control Identification/Authentication Coupling RFID to other Technologies Sensing Capabilities Sophisticated application : IOT S. TEDJINI, IMS2011, Baltimore, June 2011 Slide 3

4 Hardware Signal&Software S. TEDJINI, IMS2011, Baltimore, June 2011 Slide 4

5 S. TEDJINI, IMS2011, Baltimore, June 2011 Slide 5

6 Coding Method Double «C» Chipless Tag S. TEDJINI, IMS2011, Baltimore, June 2011 Slide 6

7 Coding Method : Double-C 15 mm N 3 N 1 N 2 Freq. (GHz) Code for N Freq. (GHz) Code for N Freq. (GHz) Code for N mm code : resonance are 2.55, 4.4 and 2.2 GHz Bits/cm² = 2.3 S. TEDJINI, IMS2011, Baltimore, June 2011 Slide 7

8 Setup for Frequency Measurement Complex RCS measurement (Radar Cross Section) Vector Network Analyser 20GHz Anechoic chamber Horn antenna 12dBi 50cm 50cm Calibration Tag Isolation measurement (to remove reflection from surrounding object) Metallic plane measurement (to remove antennas and cables effects) S. TEDJINI, IMS2011, Baltimore, June 2011 Slide 8

9 Measurement For Double C Measurements results based on frequency approach for 3 tags S21(dB) S21(dB) S21(dB) measurement --- simulation Tag 1 Tag 2 Tag 3 Tag 1: L 1 =0mm, L 2 =1mm, L 3 =0mm Tag 2: L 1 =3.5mm,L 2 =0m m, L 3 =0mm Tag 3: L 1 =0mm, L 2 =0mm, L 3 =3.5mm Mode 1 (GHz) Mode 2 (GHz) Mode 3 (GHz) Mode 4 (GHz) S. TEDJINI, IMS2011, Baltimore, June 2011 Slide 9

10 Setup for Time Measurement Complex RCS measurement (Radar Cross Section) Pulse generator 100ps DSO Agilent 13GHz, 40Gs/s RTS Pulse shape 2V 70ps syncro 50cm 50cm 50cm Horn antenna 12dBi -2.5dB Tag -15dB S. TEDJINI, IMS2011, Baltimore, June 2011 Slide 10

11 Measurement Results For Double C (Cont) Measurements results based on temporal approach for 3 tags S21(dB) S21(dB) S21(dB) Tag 1 Tag 2 F(GHz) F(GHz) Time domain Frequency domain Missing Peak at 5.5GHz Tag 3 S. TEDJINI, IMS2011, F(GHz) Baltimore, June 2011 Slide 11

12 Large Capacity Coding Design Tag C having 5 resonators Frequency Shift Encoding K=5 BW = 1000MHz Δf = 100MHz N= C= log2(n)=16.6 bits Coding Capacity Calculation λ/4 λ/4 RCS f0 f0+δf Frequency Coding Capacity (bits) For K=23, BW = 350MHz, Δf = 50MHz, C= 69 bits!! Δf=50MHz 12 K resonators S. TEDJINI, IMS2011, Baltimore, June 2011 Slide 12

13 Tag C Frequency Domain Measurements S21 (db) 6cm 2.5cm Frequency (GHz) S. TEDJINI, IMS2011, Baltimore, June 2011 Slide 13

14 First Sensing Chipless Tag The Thing EM Cavity Membrane Modulated Reflected Signal CW Signal of Interrogation Spying Device Leon Theremin MHz Wireless Microphone Monopole Antenna source S. TEDJINI, IMS2011, Baltimore, June 2011 Slide 14

15 Some NTC Parameters Reference NTC Description Measurement type Dielectric constant Wua & Kong, Applied Physics, 2004 MWNT-epoxy resin composites Impedance method Free space method 5-10 ( 18 GHz) Matitsine, Liu, Chen, & Gan, Applied Physics, MWNT-epoxy resin composites Impedance method ( 5 GHz) Liu, Matitsine, Gan, Chen, Kong, Applied Physics, MWNT-epoxy resin composites Impedance method Coaxial line ( 10 GHz) Liu, Kong, & Matitsine, Applied Physics, MWNT-silicon composites Impedance method ( 1 GHz) Moayed, Khan, Obol, Gupta, & Afsar, Instrumentation Meas. Techno. Conf Powder of NTC Rectangular guide ( 40 GHz) Wang, Zhou & Xin, IEEE-MTT, Zhao, Gao,& Shen, American Carbon Society, MWNT on paper Rectangular guide ( 60 GHz) MWNT-paraffin composites Rectangular guide 14 (26 40 GHz) S. TEDJINI, IMS2011, Baltimore, June 2011 Slide 15

16 Simulation of Tag C modified Tag C, modified with a deposit of CNT Dielectric thickness : 0.8mm CNT Deposit thickness : 0.1mm PTFE: εr =2.1 Tanδ= Pg 0 RCS dbsm 1GHz: εr =31 Tanδ=0.16 Frequency (GHz) S. TEDJINI, IMS2011, Baltimore, June 2011 Slide 16

17 Deposit of Nanomaterial Volume Process of deposition 3 tags have been modified in such a way Tag 1 : deposit of 2 drops of NMat1 Tag 2 : deposit of 1 drop of NMat2 Tag 4 : deposit of 2 drops of NMat2 Drop deposit in this area 2 deposits made : Deposit 1 : back to the metal layer Deposit 2 : on the metal layer Nanomaterials are LTM Laboratory. LTM has large expertise in nanotechnology & nanomaterials S. TEDJINI, IMS2011, Baltimore, June 2011 Slide 17

18 Measurement Results Measurement Result for Tag 1 Deposit 1 Deposit 2 Unmodified tag Uncalibrated measurement S. TEDJINI, IMS2011, Baltimore, June 2011 Slide 18

19 Measurement Results (Cont) Zoom on Measurement Result for Tag 1 Deposit 1 Deposit 2 Unmodified tag Uncalibrated measurement S. TEDJINI, IMS2011, Baltimore, June 2011 Slide 19

20 Measurement Results (Cont) Measurement Result for Tag 4 Deposit 1 Deposit 2 Unmodified tag Uncalibrated measurement S. TEDJINI, IMS2011, Baltimore, June 2011 Slide 20

21 Measurement Results (Cont) Zoom on Measurement Result for Tag 4 Deposit 1 Deposit 2 Unmodified tag Uncalibrated measurement S. TEDJINI, IMS2011, Baltimore, June 2011 Slide 21

22 Result analysis : Frequency deviation calculation Tag 1 2,47 3,49 3 Tag 1 modified (dep. 1) Tag 1 modified (dep. 2) f1 Δf f2 Δf F3 Δf f4 Δf f5 Δf 2, ,48 2 2, ,48 8 Tag 2 2,568 3,49 3 Tag 2 modified (dep. 1) Tag 2 modified (dep. 2) 2, ,48 2 2, ,48 5 Tag 4 2,592 3,59 4 Tag 4 modified (dep. 1) Tag 4 modified (dep. 2) Measurement Results (Cont) 2, ,56 7 2, ,55 7 4, , ,48 9 4, , ,46 5 4, , ,60 6 5, , ,42 7 5, , ,48 6 5, , ,62 7 6, , ,40 3 6, , ,39 7 6, , S. TEDJINI, IMS2011, Baltimore, June 2011 Slide ,5-94

23 Measurement Results (Cont) Result analysis : Frequency shift 2.5 GHz 3.5 GHz 4.5 GHz 5.5 GHz 6.5 GHz 2.5 GHz 3.5 GHz 4.5 GHz 5.5 GHz 6.5 GHz S. TEDJINI, IMS2011, Baltimore, June 2011 Slide 23

24 Figure of Merit : The Density of coding DPS (bits / cm²) 1 S.Preradovic (8.8cmX6.5cm) 35 bits, BW=4000MHz I.Jalaly (1.8cmX3.5cm) 5 bits, BW=400MHz 3 Lu Zhang (18cmX5cm) 4 bits, pulse UWB Phase encoded tag, I.Balbin (12cmX5cm) 3 bits, BW=«350MHz» C. Mandel (26cmX4cm) 5 bits, pulse UWB cavity tag (Δf=2MHz) (3x6cm) 13 bits, BW=170MHz Cavity tag (Δf=1MHz) (3x6cm) 16 bits, BW=170MHz C Cell (Δf=50MHz) (1.5x2cm) 9 bits, BW=2200MHz DPF (bits / GHz) DPS is very high with this new tag. DPS and DPF strongly depend on the resolution of the reading system. S. TEDJINI, IMS2011, Baltimore, June 2011 Slide 24

25 Concluding Remarks Chipess tags for identification Many coding techniques are possible Chipless could be designed - Less sensitivity to environment Robust tag - High sensitivity to environment Sensing tag Using Nanomaterial Frequency shift demonstrated Could be controlled Material sensitive to some parameters S. TEDJINI, IMS2011, Baltimore, June 2011 Slide 25