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Cellular Device Detection

Instructor : Yossi Hipsh Performed by : Smadar Katan Gal Mendelson Project Number: D0517 Winter 2007/8 Semesterial Project. Cellular Device Detection. Midterm Presentation . General specifications. Room size : 4mX6m. The tables are 0.7m high.

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Cellular Device Detection

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  1. Instructor:Yossi HipshPerformed by:Smadar Katan Gal Mendelson Project Number: D0517 Winter 2007/8 Semesterial Project Cellular Device Detection Midterm Presentation

  2. General specifications • Room size : 4mX6m. • The tables are 0.7m high. • 2 Multi-beam antenna at each side of the room for full coverage.

  3. θroom θroom The Room

  4. General specifications (Continue…) • So far there was a solution for one cellular device in the room. • Our project deals with two cellular devices in the room • The devices are far enough from one another that they will be received in two different pairs of beams.

  5. General specifications (Continue…)

  6. General specifications (Continue…)

  7. General specifications (Continue…)- power of Mobile Station Since we are dealing with Cellcom for now we will focus on GSM: Mobilestations can come in differentpowerclasses, which define the maximum RFpowerlevel that the unit can transmit. ForGSM-900 there are five powers classes, forGSM-1800 there are threepowerclasses.

  8. Solution suggestion Our Part Our Part Our Part

  9. 7.8cm d=43cm 3.8cm 57/8 cm Definitions and Sizes • 4 Dipole Antenna Array: (the sizes are from measurement) Antenna frequency: Wave length:

  10. Definitions and Sizes (continue…) • The angles are: • Where

  11. Beams’ angles

  12. Geometry Calculations (continue…) In order to maintain symmetry we will place the antenna as following:

  13. BFN

  14. The Beams • To manufacture beams that point to different directions we need to change the length of the micro strip lines in the following way:

  15. The Beams (continue…) • Let’s observe two dipoles • We see that • L=11.6 cm

  16. The Beams (continue…) Now we can determine:

  17. Computing

  18. Location Calculation of rotation angle of the antenna: From the "Law of cosine": Drawing 10

  19. Location

  20. Location (continue…)

  21. Time Schedule • Design and manufacture BFN for two beams • which includes • BFN for θ angle (manufacturing 2) • Power combiner network 2:1 (manufacturing 8) • - Integrating . • 17.02.08 • Developing the Simulator 17.03.08 • Final report and presentation 1.04.08

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