1 / 66

Mobile Phone

Tanta University Faculty Of Engineering Electronics & Electrical Communication Department Challenger 8 Team. Mobile Phone. Signal Booster. Team Members . 1 . Mohammad Ashraf El- Sharkawy ( Leader ) 2. Al- Shaimaa Ibrahim El- Shenawy ( Manager )

ashton
Download Presentation

Mobile Phone

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Tanta University Faculty Of Engineering Electronics & Electrical Communication Department Challenger 8 Team Mobile Phone Signal Booster

  2. Team Members 1. Mohammad Ashraf El- Sharkawy ( Leader ) 2. Al- Shaimaa Ibrahim El- Shenawy ( Manager ) 3. Mohammad Mahrous Abd-Allah ( Presenter ) 4. Ola Mostafa Abu El-Naga ( Contact Person ) 5. Hanan Mohammad Abd AL- Galil ( Moderator ) 6. Heba Taha Ahmed Arafat ( Treasurer ) 7. Mohammad Abd El-Hakim Youssof ( member ) 8. Asmaa Ali mohammad ( Member )

  3. Problem Definition

  4. Here’s the solution Signal Booster

  5. Introduction Brief preview about GSM Technical parts & Implementation Market research conclusion

  6. Users Of Signal Booster….. • 1- For people who are located in remote places and suffer from weak signal. • 2- It is very useful in cities, where in spite of full coverage there are places with no or poor signals. • 3-Simply plug our Signal Booster and you'll be astonished by the results.

  7. Signal Booster Components: 1- Outdoor Antenna: 2- Base Unit: 3- Indoor Antenna:

  8. How does signal booster work ??

  9. Signal Booster Example

  10. Advantages • Increase indoor cell coverage up to 100 . • No more hanging out of the window to get a signal. • Unique in Egyptian market. • Very easy to install by the user. • Increase employee productivity. • Small size with special and distinct shape. • Improve battery life of your phone.

  11. Introduction Brief preview about GSM Technical parts & Implementation Market research conclusion

  12. GSM Cell:

  13. Cell Size & Coverage:

  14. Advantage Of GSM

  15. Duplex Transmission:

  16. Multiple Access Methods:

  17. FDMA/TDMA:

  18. Block Diagram Power supply & Charge Battery IR System Outdoor antenna Indoor antenna [Downlink] Power amplifier Preamplifier AGC Outdoor antenna Indoor antenna [Uplink] Power amplifier BPF Preamplifier AGC

  19. Team work

  20. Power Supply Power supply & Charge Battery IR receiver Outdoor antenna Indoor antenna [Downlink] Power amplifier Preamplifier AGC Outdoor antenna Indoor antenna [Uplink] Power amplifier BPF Preamplifier AGC

  21. Power Supply:

  22. Remote Control: • It’s a component of an electronic devices, used for operating the device wirelessly from a short line- of- sight distance. Remote control is consumer IR device.

  23. IR Transmitter:

  24. IR Receiver:

  25. Outdoor Ant. Power supply & Charge Battery IR receiver Outdoor antenna Indoor antenna [Downlink] Power amplifier Preamplifier AGC Outdoor antenna Indoor antenna [Uplink] Power amplifier BPF Preamplifier AGC

  26. Advantages: • Obtain different types from polarization linear, circular or elliptical. • Operate in HF, VHF and UHF. • Considered as a broadband antenna. • Asimple way of obtaining high-gain. • Dimensions of the helix are small compared with the wavelength. • The antenna field is maximum in a plane normal to the helix axis and minimum along its axis. MODES OF OPERATIONS: NORMAL MODE:

  27. 2) Axial Mode: • The helix dimensions are at or above the wavelength of operation. • Commonly employed only at frequencies ranging from VHF up to microwave. • Produces a true and consistent circular polarization. • Provides better gain and high bandwidth ratio as compared to the normal mode of operation. • Installed on communication satellites and space vehicles as well as on earth station.

  28. Helical Software Design: Output for software: Input for software: • Frequency =900MHZ. • Wavelength = 0.33m. • NO. of turns =5 turns. • Pitch angle = 14 degrees.

  29. Matching: • Ensures that the max Power is transferred from the outdoor antenna to the base unit through coaxial cable. • Reduce the impedance of the outdoor antenna using:

  30. Coaxial Cable: It's electrical cable used to carry RF signal. ADVANTAGES: • Large bandwidth than twisted pair. • High data rate. • High immunity to interference.

  31. Application: For high frequency • Connecting TX and Rx with their antennas. • Local Area Network. For low frequency • Long distance telephone transmission. • F type connector : • Inexpensive. • 75Ω impedance. Connectors:

  32. PreAmplifier Power supply & Charge Battery IR receiver Outdoor antenna Indoor antenna [Downlink] Power amplifier Preamplifier AGC Outdoor antenna Indoor antenna [Uplink] Power amplifier BPF Preamplifier AGC

  33. Preamplifiers: • BGA 2003 (Silicon Amplifier): In general, the function of a preamp is to amplify a low-level signal to line-level. DESCRIPTION: Silicon amplifier consisting of an NPN double poly silicon transistor with integrated biasing for low voltage applications in a plastic.

  34. Applications: • Wideband applications, e.g. analog and digital cellular Telephones. • High frequency oscillators. • Low noise amplifiers. FEATURES: • Low current. • Very high power gain. • Low noise figure. • Control pin for adjustment bias current. • Supply and RF output pin combined.

  35. Circuit Diagram:

  36. AGC & P. Amp. Power supply & Charge Battery IR receiver Outdoor antenna Indoor antenna [Downlink] Power amplifier Preamplifier AGC Outdoor antenna Indoor antenna [Uplink] Power amplifier BPF Preamplifier AGC

  37. Objectives Of AGC: • Prevent intermodulation in base station receivers . • Prevent interference with other mobile phones using the same booster. • Minimize power consumption. • Using the minimum power necessary for reliable communication with the selected base station, based on distance.

  38. Theory of the Automatic Gain Control:

  39. PAC Loop Components: 1) Power Amplifier: • ALM-31122 • Fully matched ,input and output with 75 ohm. • 16.5 dB gain. • 5v supply. • Low noise figure. • Gain controlled.

  40. 2) Coupler • It’s used for the connection between PA o/p and the RF detector i/P. • The amount of coupling also defines the amount of feedback gain. • Converts the PA output voltage into a DC voltage used for comparison with the DSP value (vref). • HSMS-2825 schotty diode. 3) RF detector

  41. 4) Summer Circuit: V dsp Difference Amplifier Integrator Offset PA Control + + - Offset value Detector o/p

  42. 4.1) Difference amplifier • Error signal computation can be done using a difference amplifier. • V det=detector o/p • Vdsp=desired signal power level

  43. 4.2) Integrator • Difference amplifier. Combined with the integrator into one operational amplifier, the Differential Integrator block.

  44. 4.3) Offset • 2.8 V TX Enable signals produces the offset voltage. • The PA control voltage is the sum of the integrator output and the desired offset. • The loop is considered closed once the PA reaches threshold.

  45. Typical Circuit:

  46. Indoor Ant. Power supply & Charge Battery IR receiver Outdoor antenna Indoor antenna [Downlink] Power amplifier Preamplifier AGC Outdoor antenna Indoor antenna [Uplink] Power amplifier BPF Preamplifier AGC

  47. Indoor Antenna: • Omni directional antenna is used as indoor antenna. • It's antenna that radiates equally in all directions. • The only three dimensional Omni directional antenna is the unity gain isotropic antenna. Omni Antenna (100709):

  48. Features: • Small and lightweight. • No tuning components. Electrical: • Frequency range: 880-960MHZ. • Polarization linear. • Feed point impedance 75 ohms. Mechanical: • Size: 37.59 x 11.94 x 2.77 mm. • Weight less than 2.5 g. • Mounting: surface mounted technology.

  49. Typical Band: Typical Pattern:

  50. PreAmplifier: Power supply & Charge Battery IR receiver Outdoor antenna Indoor antenna [Downlink] Power amplifier Preamplifier AGC Outdoor antenna Indoor antenna [Uplink] Power amplifier BPF Preamplifier AGC

More Related