Presentation thursday wireless_networks

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  • Yagi fractal patch antennas
  • Presentation thursday wireless_networks

    1. 1. Welcome Sensor Platform DesignAntenna Design & Energy Harvesting Mayur Sarode Engineer , INCAS3
    2. 2. About me
    3. 3. Sensor Platform Design Wireless Autonomous Sensor Platform (WASP) antenna Signal Radio Sensor Processor Energy Harvester Energy Storage ULP (μW) consumption Wisemote/Cargate as a WASP design
    4. 4. Antenna Design; Introduction Any conducting object is an antenna Small antenna for sensor applications : length< λ/10 Short dipole antenna loop antennas microstrip patch antennas
    5. 5.  Various shapes & sizesPerformance parametersDirectivityGainRadiation PatternPolarizationInput impedanceResonance frequencyEfficiency
    6. 6. Antenna Design; Desing Flow EM: Electromagnetic Simulation
    7. 7. Antennas Design; Wisemote™ 2.0 rev.2 Specifications Efficient than present chip antenna in the Wisemote Ideally Omnidirectional Maximum range Integrated on the Wisemote Theoretical analysis An electrically small antenna (ka<0.5) Spherical helix antennas chosen Selection of EM simulation software Mathematical Importing as a Fortran Antenna analysis Model with NEC2 code
    8. 8. Antenna Design; Simulation Results Radiation Pattern 2dB<Gain<5.24 dB@ 45°-90° Polarization Linear Horizontal Polarization
    9. 9.  Reflection results  S11= -17 dB22.5 GHz VSWR°1.35:1  Higher Antenna efficeincy Input impedance  Z=39.96+ 9.14jΩ  No external impedance matching required
    10. 10. Antenna Design; Manufacturing  Manufacturing the antenna  Conformal printing of metallic ink Created by Georges Meinders in Catia  Antenna feed design Impedance matching Radio Feed point matching Design of microstrip lines/balun for antenna testing Simulated in CST at IMEC/Holst center
    11. 11. Antenna Design; RF Measurements Wisemote™ 2.0 rev.2 Polarization measurement with antenna orientation E RX_V Base station H RX_H E H  Antenna on Wisemotes is horizontally polarized
    12. 12. Antenna Design : Conclusion Impedance matching of the antenna Antenna Diversity Using orthogonal antennas at basestation
    13. 13. Energy Harvesting; Wireless Cargate Proposed block diagram Solar Power Energy storage, cells management capactior, battery Magneto Radio sensor Power Management Design Optimum load @light intensity
    14. 14. Thank you for listening

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