Tanta University Faculty Of Engineering Electronics & Electrical Communication Department Challenger 8 Team Tanta University Faculty Of Engineering Electronics & Electrical Communication Department Challenger 8 Team

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.

Preamplifier Power supply & Charge Battery IR System Power amplifier AGC BPF [Downlink] [Uplink] Outdoor antennaIndoor antenna Preamplifier Power amplifier AGC Outdoor antenna Indoor antenna

Hanan & Ola Power Amplifier. AGC. Conclusion. Asmaa & Heba Power Supply. IR Circuits. Exiting Solution. M.Elshrkawy & Alshimaa GSM. Helical Antenna. Omni Antenna. M.Mahrous & M.Hakim Block Diagram Preamplifier. BPF. Team work

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

 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. Remote ControlIR ReceiverIR Transmitter

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

 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.

 Frequency =900MHZ.  Wavelength = 0.33m.  NO. of turns =5 turns.  Pitch angle = 14 degrees. Circumference of helix1 Lambda Space between turns0.08 m Helix diameter0.1 m Length of turns0.33m Axial length0.4m Antenna gain13.21 dB Half power beam width46 degrees Beam width at 1st null102 degrees Input impedance140 Ω

 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:

It's electrical cable used to carry RF signal.  Large bandwidth than twisted pair.  High data rate.  High immunity to interference.

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.

Preamplifier Power supply & Charge Battery IR receiver Power amplifier AGC BPF [Downlink] [Uplink] Outdoor antennaIndoor antenna Preamplifier Power amplifier AGC Outdoor antennaIndoor antenna PreAmplifierPreAmplifier

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:

Preamplifier Power supply & Charge Battery IR receiver Power amplifier AGC BPF [Downlink] [Uplink] Outdoor antennaIndoor antenna Preamplifier Power amplifier AGC Outdoor antennaIndoor antenna

 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.

1) Power Amplifier:  ALM  Fully matched,input and output with 75 ohm.  16.5 dB gain.  5v supply.  Low noise figure.  Gain controlled.

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

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

4.1) Difference amplifier  Error 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:

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

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

Preamplifier Power supply & Charge Battery IR receiver Power amplifier AGC BPF [Downlink] [Uplink] Outdoor antennaIndoor antenna Preamplifier Power amplifier AGC Outdoor antennaIndoor antenna

 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: ItemSymbolRatingUNIT Supply voltageVdd8V Supply currentIdd GSM3A Vtxlo voltageVtxlo4V Input powerPin10dBm Output powerPout GSM5w

Preamplifier Power supply & Charge Battery IR receiver Power amplifier AGC BPF [Downlink] [Uplink] Outdoor antennaIndoor antenna Preamplifier Power amplifier AGC Outdoor antennaIndoor antenna

 Remove unwanted frequency components from the signal.  Enhances Wanted signal.  It passes frequencies within a certain range ( 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 (resistor–inductor–capacitor circuit).

Pin No.Func. 1Input 2Gnd 3 4Output 5Gnd

 Mini GSM 900  Wilson Cell Phone Booster Kit  Wireless Desktop Cell Phone Booster Kit

Signal Booster Wireless Desktop Cell Phone Booster Kit Wilson Cell Phone Booster Kit MR-mini GSM900 Metric Coverage area 50 dB60 dB55 dB60 dBHigh gain 60$190$375$248$Low cost 120 Sec Time to assemble to desired area Pass World health organization limitation Yes Has special and distinct shape 12v10v12v10vLow i/p dc power