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Enhancement of Tools for Design of Antennas for Mobile Devices

Enhancement of Tools for Design of Antennas for Mobile Devices. 2003 Clemson SURE Program Presented By: Robert J. Loeven Advisor: Dr. Anthony Martin. Modern Mobile Device Antennas. Very Small Multi-Band Used in Cell Phones, Wireless Laptops, etc. PIFA – Planar Inverted F-type Antenna.

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Enhancement of Tools for Design of Antennas for Mobile Devices

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  1. Enhancement of Tools for Design of Antennas for Mobile Devices 2003 Clemson SURE Program Presented By: Robert J. Loeven Advisor: Dr. Anthony Martin

  2. Modern Mobile Device Antennas • Very Small • Multi-Band • Used in Cell Phones, Wireless Laptops, etc. • PIFA – Planar Inverted F-type Antenna

  3. Project Goals • Use MATLAB to model antenna structures and performance, using Makarov programs Antenna and EM Modeling, Sergey N. Makarov, John Wiley and Sons Inc. 2002 • Alter Makarov programs to show more detail and enhance quality of output • Use new programs to analyze antennas, specifically patch antennas designed for cell phones and wireless notebook connections

  4. Triangular Surface-Patch Meshes and the Rao-Wilton-Glisson Basis Functions • First requires a 3D “Mesh” antenna structure which can be created using MATLAB PDE Toolbox • Plate Example

  5. Equations • Surface Currents – • Current Interpolation

  6. Bowtie Example to Demonstrate Color Modifications in RWG5.m and plotcurr5.m

  7. Bowtie – RWG5 - Old vs. New

  8. Bowtie Example – New Plotcurr5 Output

  9. 3D Far-Field Patterns: Old Efield2.m

  10. New Efield3D.m with Antenna and Transparency

  11. Efield3D.m 3D Rotation

  12. Simulated Dipole Frequency Sweep

  13. Dipole Frequency Demonstrationλ/2 (75MHz)λ (150MHz) 3λ/2 (225MHz) 2λ (300 MHz)

  14. Patch Antenna Design Simulation

  15. Frequency Sweep Results 500 MHz to 6 GHz

  16. Current Distribution at 2 GHz

  17. Patch Antenna E-Field

  18. Patch E-field with Antenna Included

  19. E-Shaped Patch Antenna Simulation

  20. E-Shape Analysis

  21. E-Shape Surface Currents

  22. E-Shape 3D E-Field

  23. E-Shape 3D with Antenna Included

  24. Future Work • Speed up code by using matrix interpolation • Modify plotcurr5.m code to work in 3D • Modify codes to allow for the inclusion of dielectric materials into the antennas • Use program to simulate and study real world antenna designs

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