Transcript Indoor Antenna

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.
1- Outdoor Antenna:
2- Base Unit:
3- Indoor Antenna:
 Increase indoor cell coverage up to 100 𝑚2 .
 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.
Power supply &
Charge Battery
Outdoor antenna
Indoor antenna
[Downlink]
Power amplifier
Preamplifier
Outdoor antenna
AGC
[Uplink]
Power amplifier
AGC
IR System
BPF
Preamplifier
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
Power Supply
Outdoor antenna
Power supply &
Charge Battery
Indoor antenna
[Downlink]
Power amplifier
Preamplifier
AGC
Outdoor antenna
[Uplink]
Power amplifier
AGC
IR receiver
BPF
Preamplifier
Indoor antenna
 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 Control
IR Transmitter
IR Receiver
Outdoor Ant.
Outdoor antenna
Power supply &
Charge Battery
Indoor antenna
[Downlink]
Power amplifier
Preamplifier
AGC
Outdoor antenna
[Uplink]
Power amplifier
AGC
IR receiver
BPF
Preamplifier
Indoor antenna
 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 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 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
Outdoor antenna
Power supply &
Charge Battery
Indoor antenna
[Downlink]
Power amplifier
Preamplifier
AGC
Outdoor antenna
[Uplink]
Power amplifier
AGC
IR receiver
BPF
Preamplifier
Indoor antenna
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:
Power supply &
Charge Battery
Outdoor antenna
Indoor antenna
[Downlink]
Power amplifier
Preamplifier
AGC
Outdoor antenna
[Uplink]
Power amplifier
AGC
IR receiver
BPF
Preamplifier
Indoor 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-31122
 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.
3) RF detector
 Converts the PA output voltage into a DC voltage used for comparison
with the DSP value (vref).
 HSMS-2825 schotty diode.
4) Summer Circuit:
V dsp
Difference
Amplifier
+
Detector o/p
Integrator
Offset
PA Control
+
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:
Power supply &
Charge Battery
Outdoor antenna
Indoor antenna
[Downlink]
Power amplifier
Preamplifier
AGC
Outdoor antenna
[Uplink]
Power amplifier
AGC
IR receiver
BPF
Preamplifier
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.
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.
Power supply &
Charge Battery
Outdoor antenna
Indoor antenna
[Downlink]
Power amplifier
Preamplifier
AGC
Outdoor antenna
[Uplink]
Power amplifier
AGC
IR receiver
BPF
Preamplifier
Indoor 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:
Item
Supply voltage
Symbol
Vdd
Rating
8
UNIT
V
Supply current
Idd GSM
3
A
Vtxlo voltage
Vtxlo
4
V
Input power
Pin
10
dBm
Output power
Pout GSM
5
w
Power supply &
Charge Battery
Outdoor antenna
IR receiver
Indoor antenna
[Downlink]
Power amplifier
Preamplifier
AGC
Outdoor antenna
[Uplink]
Power amplifier
AGC
BPF
Preamplifier
Indoor antenna
 Remove 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 (resistor–inductor–capacitor circuit).
Pin No.
Func.
1
Input
2
Gnd
3
Gnd
4
Output
5
Gnd
 Mini GSM 900
 Wilson Cell Phone Booster Kit
 Wireless Desktop Cell Phone Booster Kit
 Decrease dropped or missed calls.
 Increase indoor cell coverage up to 100 𝑚2 .
 Improve battery life of your phone.
 Very easy to install by the user.
 Small size with special and distinct shape.
 Good price as it will be “60$ for one piece”.
 Produce less power than any other product which makes it more
safety.
100%
90%
80%
70%
60%
50%
40%
30%
20%
10%
0%
Mobile importance
Signal weakness
Purchasing power
Students Private
Free
General Average
Employee business employee
Metric
MR-mini
GSM900
Wilson Cell
Phone
Booster Kit
Wireless
Desktop Cell
Phone
Booster Kit
Signal
Booster
250 𝑚2
95 𝑚2
200 𝑚2
100 𝑚2
High gain
60 dB
55 dB
60 dB
50 dB
Low cost
248$
375$
190$
60$
120 Sec
120 Sec
120 Sec
120 Sec
Coverage area
Time to assemble
to desired area
World health
organization
limitation
Pass
Pass
Pass
Pass
Has special and
distinct shape
Yes
Yes
Yes
Yes
Low i/p dc power
10v
12v
10v
12v