Ultra Wide Band Antenna for High Speed Microwave Applications

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What is Antenna ?!
What is microstrip Antenna ?!
What is UWB ?!
Difference between rectangular & circular Patch antenna !

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Ultra Wide Band Antenna for High Speed Microwave Applications

  1. 1. UWB ANTENNA FOR MICROWAVE APPLICATIONS Prepared by: Ahmed Tarek Omar Hussien Sherif Shawki Sherif Zahran Supervised by: DR/Mahmoud Abdallah
  2. 2. Agenda What is Antenna. What is UWB. What is Micro-strip antenna. Initial Design Results. Single micro-strip antenna. Circular & Rectangular UWB antenna.
  3. 3. Antenna Antenna: Is an electrical device which converts electric power into radio waves, and vice versa. Theory of operation.
  4. 4. Antenna Parameters Radiation pattern : Plot of the relative field strength of the radio waves emitted by the antenna at different angles. Antenna directivity: The ratio of the radiation intensity in a given direction from the antenna to the radiation intensity averaged over all directions.
  5. 5.  Antenna Gain: Parameter which measures the degree of directivity of the antennas radiation pattern. Antenna Polarization: Is the orientation of the electric field of the radio wave with respect to the Earths surface and is determined by the physical structure of the antenna and by its orientation.
  6. 6.  Input impedance: Electro-magnetic wave travels through the different parts of the antenna, at each interface some fraction of the waves energy will reflect back to the source.
  7. 7. Antenna Mode: Patch antenna. Type: Monopole antenna.
  8. 8. UWB UWB: Ultra Wide Band, Also known as(ultra band). A series of very short baseband pulses with time duration in nano-seconds that exist on ALL frequencies simultaneously. UWB in the frequency range from 3.1 to 10.6 GHz.
  9. 9.  UWB transmissions transmit information by generating small pulses at specific time intervals. Each pulse occupies a large BW, overcoming The multipath fading but not the ISI.
  10. 10.  UWB pulses are very short so most signal reflections do not overlap the original pulse (less than 1nsec).(less than 60 cm for a 500 MHz pulse, less than 23 cm for a 1.3 GHz pulse), up to 1.3 Gp/sec providing a continuous stream of UWB pulses according to application. it operates parallel to other systems so energy has to be low to get no interference.
  11. 11. UWB coexistence with systems No interference with systems because of low power. Power limit for UWB Tx is -41.3 dBm/MHz. High data rates according to Shannons theory.
  12. 12. UWB vs. narrowband
  13. 13. UWB Applications AUTOMOTIVE INDUSTRY-Back collision avoidance.-Wireless key.-Moving objects detection while driving.-Improving airbags activation and suspension performance. COMMUNICATION-High multipath areas.-Low range-high rates areas.-Home personal area networks.(pcs,hd TV, hr printer, hr scanner,hd cameras, game consoles)
  14. 14. UWB Applications Security Apps-Ground penetrating radars(GPR).-Through wall surveillance.-Tracking applications(specially indoors unlike GPS) For children,personnel,equipments,cars-Guarding objects (ex. in museums).
  15. 15. Why UWB? High data rate and capacity(400-800Mbps ). High speed. High Security (cannot jam the large BW). Low power (operates at low energy level). Working parallel with other systems. Fading overcoming.
  16. 16. Micro-strip antenna
  17. 17. Micro-strip antenna Types Patch -Square. -Rectangular. -Circular. -Elliptical. Planar Inverted F Antenna (PIFA). Folded Inverted Conformal Antenna (FICA).
  18. 18. Patch antenna Radio antenna with a low profile. Narrowband. Wide-beam antenna. Simple to fabricate and easy to modify and customize. Multiple feed points.
  19. 19. Advantages Relatively inexpensive to manufacture and design. The ability to create high gain arrays in a low- profile antenna. The ability to have polarization diversity.
  20. 20. MatchingMatched Unmatched
  21. 21. Matched return loss
  22. 22. Unmatched return loss
  23. 23. Matching rules
  24. 24. UWB ANTENNA
  25. 25. Circular Antenna Rectangular Antenna
  26. 26. Circular return loss
  27. 27. Rectangular return loss
  28. 28. 3D PATTERNSNORMALIZED SCALE Fo=5 GHz
  29. 29. 1GHz Circular Rectangular
  30. 30. 2GHz Circular Rectangular
  31. 31. 3GHz Circular Rectangular
  32. 32. 4GHz Circular Rectangular
  33. 33. 5GHz Circular Rectangular
  34. 34. 6GHz Circular Rectangular
  35. 35. 7GHz Circular Rectangular
  36. 36. 8GHz Circular Rectangular
  37. 37. 9GHz Circular Rectangular
  38. 38. 10GHz Circular Rectangular
  39. 39. 11GHz Circular Rectangular
  40. 40. 12GHz Circular Rectangular
  41. 41. E-PLANE 2DPATTERNNORMALIZED SCALE X-Y Plane Theta=90
  42. 42. 1Ghz Circular Rectangular
  43. 43. 2Ghz Circular Rectangular
  44. 44. 3Ghz Circular Rectangular
  45. 45. 4Ghz Circular Rectangular
  46. 46. 5Ghz Circular Rectangular
  47. 47. 6Ghz Circular Rectangular
  48. 48. 7Ghz Circular Rectangular
  49. 49. 8Ghz Circular Rectangular
  50. 50. 9Ghz Circular Rectangular
  51. 51. 10Ghz Circular Rectangular
  52. 52. 11Ghz Circular Rectangular
  53. 53. 12Ghz Circular Rectangular
  54. 54. Future goals Design and Implementation of UWB Antenna which receives signals within range of 3.1-10.6 GHz. With minimum interference with other bands i.e.: Wifi, Bluetooth ,...etc
  55. 55. Any questions ? Thank you

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