1. Cellular Device Detection Instructor : Yossi Hipsh Performed by: Smadar Katan Gal Mendelson Project Number: D0517 Winter 2007/8 Semesterial Project 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. The Room θ 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…) Transmission FrequencyCompany 902.2-910 MHz 947-955.2 MHz 910.2-912.2 MHz 955.2-957.2 MHz Partner 835-845 MHz 880-890 MHz 1710-1712 MHz 1805-1807 MHz Cellcom 825-835 MHz 870-880 MHz 845-847 MHz 890-892 MHz Pelephone

6. General specifications (Continue…) Transmission FrequencyCompany 902.2-910 MHz 947-955.2 MHz 910.2-912.2 MHz 955.2-957.2 MHz Partner 835-845 MHz 880-890 MHz 1710-1712 MHz 1805-1807 MHz Cellcom 825-835 MHz 870-880 MHz 845-847 MHz 890-892 MHz Pelephone

7. General specifications (Continue…)- power of Mobile Station GSM 1800GSM 900Mobile Class 30 dbm = 1 Watt1 24 dbm = 0.25 Watt2 36 dbm = 4 Watt3 4 5 Since we are dealing with Cellcom for now we will focus on GSM: Mobile stations can come in different power classes, which define the maximum RF power level that the unit can transmit. For GSM-900 there are five powers classes, for GSM-1800 there are three power classes.

8. Solution suggestion Our Part

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

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

11. Beams’ angles

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

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

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