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Accessible Radio-Frequency Analysis

Accessible Radio-Frequency Analysis. Neil Gershenfeld Esa Masood Rich Fletcher John Loof Physics and Media Group. Generations of Tag Readers for Chipless RFID tags. HP Network Analyzer (~$100k) ‘Read Anything’ Design MOMA board Current Design (~$150). To PC. PIC Micrcontroller

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Accessible Radio-Frequency Analysis

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  1. Accessible Radio-Frequency Analysis Neil Gershenfeld Esa Masood Rich Fletcher John Loof Physics and Media Group

  2. Generations of Tag Readersfor Chipless RFID tags HP Network Analyzer (~$100k) ‘Read Anything’ Design MOMA board Current Design (~$150)

  3. To PC PIC Micrcontroller ADC ADC RS-232 Interface Signal Generation Digital Direct Synthesis Device I Q Magnitude Phase Differential Magnitude and Phase Detector Receiver Low-Pass Filter Signal Separation Active Probe Output Buffer Amplifier Dual Directional Coupler Reference Probe System Design

  4. 1 3 2 Space Into Frequency • Storing information in physical structures • Utilizing frequency instead of time domain • Multi-resonant planar structures • Chipless, low-cost RFID tags

  5. Decoding Information Resonant frequencies of tag Peaks in magnitude response (~6 peaks) Bits of information (~6 bits/peak)

  6. Milk-Quality Analysis (MLA) Interest in non-destructive methods of analyzing biological substances Measuring milk content in rural India – critical step in collection and distribution of milk Instrument can provide complex frequency spectrum of milk: Fast + non-invasive measurement method Postal Mail Security (USPS) Need for low-cost instrumentation for analysis of mail content: Detection of hazardous material Need to detect varying material types: Paper, metal, plastic, wood… RF dielectric constant analysis : Real-time materials characterization for wide variety of materials Materials Characterization

  7. Analysis Data Milk Application Mail Application

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