Mobile PhoneSignal BoosterTanta UniversityFaculty Of EngineeringElectronics & Electrical Communication Department

Challenger 8 Team

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 )

Problem Definition

Heres the solutionSignal BoosterIntroductionBrief preview about GSMTechnical parts & ImplementationMarket researchconclusion

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.

Signal Booster Components:1- Outdoor Antenna:

2- Base Unit:

3- Indoor Antenna:

How does signal booster work ??

Signal Booster Example

AdvantagesIntroductionBrief preview about GSMTechnical parts & ImplementationMarket researchconclusion

GSM Cell:

Cell Size & Coverage:

Advantage Of GSM

Duplex Transmission:

Multiple Access Methods:

FDMA/TDMA:

PreamplifierPower supply & Charge Battery IR SystemPower amplifierAGCBPF[Downlink][Uplink]Outdoor antennaIndoor antennaPreamplifierPower amplifierAGCOutdoor antennaIndoor antennaBlock DiagramTeam work

19PreamplifierPower supply & Charge Battery IR receiverPower amplifierAGCBPF[Downlink][Uplink]Outdoor antennaIndoor antennaPreamplifierPower amplifierAGCOutdoor antennaIndoor antennaPower Supply

Power Supply:

Its 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.

Remote Control:

IR Transmitter:

23

IR Receiver:

PreamplifierPower supply & Charge Battery IR receiverPower amplifierAGCBPF[Downlink][Uplink]Outdoor antennaIndoor antennaPreamplifierPower amplifierAGCOutdoor antennaIndoor antennaOutdoor Ant.

Obtain different types from polarization linear, circular or elliptical.Operate in HF, VHF and UHF.Considered as a broadband antenna.A simple 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.Advantages:

MODES OF OPERATIONS:NORMAL 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 consistentcircular 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.

2) Axial Mode:

Frequency =900MHZ.Wavelength = 0.33m.NO. of turns =5 turns.Pitch angle = 14 degrees.

Helical Software Design:Input for software:

Output for software: Circumference of helix 1 Lambda Space between turns 0.08 m Helix diameter 0.1 m Length of turns 0.33m Axial length 0.4m Antenna gain 13.21 dB Half power beam width 46 degrees Beam width at 1st null 102 degrees Input impedance 140

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:

Matching:

It's electrical cable used to carry RF signal.

ADVANTAGES:Large bandwidth than twisted pair.High data rate.High immunity to interference.

Coaxial Cable:

For high frequency

Connecting TX and Rx with their antennas. Local Area Network.

For low frequency

Long distance telephone transmission.

Application: Connectors:

F type connector :Inexpensive.75 impedance.

PreamplifierPower supply & Charge Battery IR receiverPower amplifierAGCBPF[Downlink][Uplink]Outdoor antennaIndoor antennaPreamplifierPower amplifierAGCOutdoor antennaIndoor antennaPreAmplifier

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.

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.

Circuit Diagram:PreamplifierPower supply & Charge Battery IR receiverPower amplifierAGCBPF[Downlink][Uplink]Outdoor antennaIndoor antennaPreamplifierPower amplifierAGCOutdoor antennaIndoor antennaAGC & P. Amp.

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.

Objectives Of AGC:

Theory of the Automatic Gain Control:

1) Power Amplifier:

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

2) CouplerIts 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

Difference AmplifierIntegratorOffsetPA Control-+V dsp4) Summer Circuit:+Detector o/pOffset value4.1) Difference amplifierError signal computation can be done using a difference amplifier.

V det=detector o/p

Vdsp=desired signal power level

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

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.

Typical Circuit:PreamplifierPower supply & Charge Battery IR receiverPower amplifierAGCBPF[Downlink][Uplink]Outdoor antennaIndoor antennaPreamplifierPower amplifierAGCOutdoor antennaIndoor antennaIndoor Ant.

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 gainisotropic antenna.

Indoor Antenna:Omni Antenna (100709):

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.

Typical Pattern:

Typical Band:

PreamplifierPower supply & Charge Battery IR receiverPower amplifierAGCBPF[Downlink][Uplink]Outdoor antennaIndoor antennaPreamplifierPower amplifierAGCOutdoor antennaIndoor antennaPreAmplifier:

Preamplifier (PF08109B) :

Features:Dual band Amplifier for E-GSM (880 MHz to 915 MHz).

Simple external circuit including output matching circuit.

High gain 3 stage amplifier.

High efficiency.

Typical Circuit:

ItemSymbolRatingUNITSupply voltageVdd8VSupply currentIdd GSM3AVtxlo voltageVtxlo4VInput powerPin10dBmOutput powerPout GSM5wPreamplifierPower supply & Charge Battery IR receiverPower amplifierAGCBPF[Downlink][Uplink]Outdoor antennaIndoor antennaPreamplifierPower amplifierAGCOutdoor antennaIndoor antennaBPF:SpecificationsRemove unwanted frequency components from the signal.

Enhances Wanted signal.

It passes frequencies within a certain range (880-920 MHZ) and rejects (attenuates) frequencies outside that range.

Frequency response.

These filters can also be created by combining a low-pass filter with a high-pass filter.An example of analogue electronic band-pass filter is an RLC circuit (resistorinductorcapacitor circuit).

Pin No.Func.1Input2Gnd3Gnd4Output5GndCircuit DiagramPhysical look

IntroductionBrief preview about GSMTechnical parts & ImplementationMarket researchconclusion

Problem Definition

Outside Egypt:Mini GSM 900Wilson Cell Phone Booster KitWireless Desktop Cell Phone Booster Kit

IntroductionBrief preview about GSMTechnical parts & ImplementationMarket researchconclusion

AdvantagesMarket Research Results

Comparison between different products and our device GIZA Systems

Any Questions?