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A Compound Reconfigurable Microstrip Parasitic Array

A Compound Reconfigurable Microstrip Parasitic Array. Mentee: Jacob Block Mentor: Jake Adams. Why Compound Reconfigurable?. Reconfigurable  antenna properties can be changed dynamically by external control Compound reconfigurability Multiple Radiation Patterns

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A Compound Reconfigurable Microstrip Parasitic Array

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  1. A Compound Reconfigurable Microstrip Parasitic Array Mentee: Jacob Block Mentor: Jake Adams

  2. Why Compound Reconfigurable? • Reconfigurable  antenna properties can be changed dynamically by external control • Compound reconfigurability • Multiple Radiation Patterns • Receive signals from multiple directions • Multiple Operating Frequencies • Antennas are designed for specific operating frequencies • WiMAX (3.5 GHz) • WiFi (2.4 GHz) M. Slater, “A compound reconfigurable antenna,” M.S. thesis, University of Illinois, Urbana, IL, 2008.

  3. Microstrip Parasitic Array • Antenna (substrate, ground, patch) • Switches on parasitic elements change pattern/frequency M. Slater, “A compound reconfigurable antenna,” M.S. thesis, University of Illinois, Urbana, IL, 2008.

  4. Radiation Patterns • Yagi-Uda Antenna (dipole cylinders) • Directional radiation pattern Length of Reflector > Length of Driven > Length of Directors

  5. Operating Frequency of Antenna • Frequency Dependent • Length of arms • Switches • Varactor (variable capacitor) • Spacing between arms • Averaging Yagi-Uda Rules of Thumb (Numerical, not Analytic)

  6. 3.5Ghz – Right Tilt 2.4Ghz – Right Tilt 1 pF 10 pF 1 pF 10 pF varactors

  7. Fun Stuff with HFSS2.4 GHz

  8. Fun Stuff with HFSS3.5 GHz

  9. New Design – Reduce Size, Reduce Averaging, Increase Performance • Ground Plane Resonators (slits into the ground plane) • New switching topology • Eliminate Varactors • Simplify DC bias network (less cables) • Less averaging Mustache Meander line

  10. New Switching Topology 3.5Ghz – Right Tilt 2.4Ghz – Right Tilt

  11. Conclusion • What I learned • HFSS • Antennas • Thanks PURE! • Thanks Jake! • Questions? THANKS!

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