Mobile Jammer - How Cell Phone Jammer Works

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How Mobile Phone Jammer Works
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How Mobile Phone Jammer Works
Introduction

• The GSM mobile jammer is a device which transmits
  the signals to the same frequency. The jamming
  section is successful when the area of the mobile
  phone signal is disabled if the jammer is on. The
  first jamming device was developed and used by
  the military for communication purpose. Where the
  planed commanders use RF communication to control
  their power and also in enemy communications.
• Nowadays the mobile users are increasing day by
  day, hence the mobile phone jammer devices are
  becoming civilian by comparing with the
  electronic devices to disable the mobile signals
  in specific locations.

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How Mobile Phone Jammer Works
What is a Mobile Jammer?

• A mobile jammer is an instrument used to protect
  the cell phones from the receiving signal.
• The mobile jammer device broadcasts the signal of
  the same frequency to the GSM modem.
• The jamming is said to be successful when the
  mobile phone signals are disabled in a location.
• If the mobile jammer is enabled.

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How Mobile Phone Jammer Works
What is a Mobile Jammer?
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How Mobile Phone Jammer Works
Block Diagram of Mobile Jammer

• The block diagram of the mobile jammer mainly
  includes power supply, IF section and RF section
  with an antenna.

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How Mobile Phone Jammer Works
Block Diagram of Mobile Jammer
Power Supply

• The power supply is used to provide the power to
  the entire sections in the mobile jammer with the
  available voltages.
• The basic block diagram of the power
  supply consists of the following parts.

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How Mobile Phone Jammer Works
Block Diagram of Mobile Jammer
Power Supply

• Transformer The transformer is used to transform
  the 220V AC to the other voltage levels(step up
  and step down).
• Rectification The rectification is used to
  convert the AC voltage to the DC voltage and this
  process can be done in two methods which are full
  wave rectification half wave rectification

• Half wave Rectification During the half wave
  rectification the input signal should be positive
  cycle, hence the output voltage will be appearing

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How Mobile Phone Jammer Works
Block Diagram of Mobile Jammer
Power Supply

• Full wave Rectification In this type of
  rectifications the input signal should be in both
  i.e. in positive and negative cycles hence the
  output voltage will be appear.

• Filter In this the large capacitors are used to
  minimize the ripples in the output.
• The filter is used in the output of full wave
  rectifier to eliminate the noise fluctuations
  to provide the constant DC voltage.
• Regulators The regulators are used to provide a
  preferred DC voltage.

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How Mobile Phone Jammer Works
Block Diagram of Mobile Jammer
IF Section

• The IF section is just a triangular or saw tooth
  wave generator.
• With the help of desired range of frequencies the
  tuning section of the jammer brushes the VCO.
• To compensate the proper amount of VCO from the
  desired frequency to the maximum.
• The noise which is mixed with triangular waves is
  generated by the tuning signal.

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How Mobile Phone Jammer Works
Block Diagram of Mobile Jammer
IF Section

• The IF section is divided into three main
  sections which are given below

• Noise generator
• Mixer
• Triangular wave generator

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How Mobile Phone Jammer Works
Block Diagram of Mobile Jammer
RF Section

• The RF section is the heart of the mobile jammer
  because the output of the RF section is
  interacting with the mobile.
• There are three main sections in the RF section
  which are voltage controlled oscillator, power
  amplifier and antenna.
• The voltage controlled oscillator is very
  important in the RF section and it is a device.
• The RF section generates the RF signal which is
  interacting with the cell phones.

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How Mobile Phone Jammer Works
Block Diagram of Mobile Jammer
RF Section

• The VCO output frequency is directly proportion
  to the input voltage.
• We can manage the output frequency with the help
  of input voltage.
• If the input voltage is DC then the out has a
  specific range of frequency.
• We have the triangular wave form is the input
  then the output will be extended to the specific
  range of frequency.

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How Mobile Phone Jammer Works
Mobile Jammer Circuit Diagram

• The above circuit shows the mobile jammer circuit
  diagram.
• It is simple easy to analyse.
• Basically the mobile jammer circuit consists of
  three main circuits.
• If the three main circuits are gathered then the
  output of that circuit is called as a jammer.

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How Mobile Phone Jammer Works
Mobile Jammer Circuit Diagram

• The three circuits are mentioned below

• RF amplifier
• Tuning circuit
• Voltage controlled oscillator

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How Mobile Phone Jammer Works
Mobile Jammer Circuit Diagram
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How Mobile Phone Jammer Works
Mobile Jammer Circuit Diagram

• The transistor Q1, and the two capacitors C4 C5
  and with one resistor can compose the RF
  amplifier.
• By using the tuned circuit the RF amplifier
  amplifies the signal.
• The amplification signal is given to the antenna
  with the help of the capacitor C6.
• C6 capacitor will remove the DC signal and permit
  the AC signal.
• If the transistor Q1 is in ON state, then the
  tuned circuit at the collector end will
  be tune ON.

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How Mobile Phone Jammer Works
Mobile Jammer Circuit Diagram

• The tuned circuit consists of capacitor C1
  inductor L1 hence it act as an oscillator with
  zero resistance.
• This oscillator will produce the high frequency
  with minimum impair. 
• Both the indicator capacitor in the tuned
  circuit will oscillate the resonating frequency.
• If the tuned circuit is ON then the voltage is
  stored by the capacitor.

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How Mobile Phone Jammer Works
Mobile Jammer Circuit Diagram

• Once the capacitor is fully charged it will allow
  the charge to flow through an indicator. 
• The inductor is used to store the magnetic energy
  through this voltage across the capacitor.
• The total magnetic energy is stored in the
  inductor and the charge of the capacitor will be
  zero.
• The inductor of the magnitude will be decreased
  and the capacitor will be charged with the help
  of current in a reverse polarity manner.

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How Mobile Phone Jammer Works
Mobile Jammer Circuit Diagram

• After some period of time capacitor is charged
  completely and the magnetic energy transversely
  the inductor will be zero.
• The internal resistance is generated hence the
  oscillation will be stopped. 
• The supply of the RF amplifier is through the
  capacitor C5 to the collector terminal.
• Which is before C6 for gain signal to the tuned
  signal.
• For generating noise the capacitors C2 and C3 are
  used for the frequency generated by the tuned
  circuit. 

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How Mobile Phone Jammer Works
Mobile Jammer Circuit Diagram

• These capacitors will produce the electronic
  pulses in random.
• The cell phone Jammer works with the frequency of
  450MHz .
• If this frequency is hunk we need to generate the
  450MHz frequency with same noise.
• This is acted as a blocking signal because the
  receiver of the cell phone signal will not be
  able to understand the received signal.
• By this circuit we can able to block the cell
  phone signals.

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How Mobile Phone Jammer Works
Working of Mobile Jammer

• The Mobile phone jammer devices transmit the
  similar radio frequency which is greater power
  than the cell phone.
• The communication between the cell phone and the
  base station of the phone tower is called as a
  denial of service attack.
• This causes the obstruction with the
  communication of cell phones.
• Towers to make the cell phones not viable and
  there is no network visibility.

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How Mobile Phone Jammer Works
Working of Mobile Jammer

• Hence it works in both ways i.e. Cell phone to
  the tower frequency and the other one is tower to
  mobile frequency.

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How Mobile Phone Jammer Works
Different Types of Mobile Jammers

• There are different types of mobile jammers which
  are given below

• Remote Controlled Mobile jammer
• Adjustable Mobile Jammer
• School Prison Mobile Jammer
• Explosion Proof Mobile jammer
• Police Military Mobile Jammer
• Portable Mobile Jammer

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How Mobile Phone Jammer Works
Applications of Mobile Jammer

• The Mobile jammers are used in the classrooms,
  and library to maintain silence.
• It is used in the seminar halls and meeting rooms
  to avoid disturbances.
• It is used in the hospitals.
• The mobile jammers are used in the temples,
  churches, etc.

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How Mobile Phone Jammer Works
Conclusion

• Every technology has good aspect as well as bad
  aspect the important thing is ,how we are using
  it. Mobile phone jammers are very useful to the
  society from the anti-social elements. Cell phone
  jammers prevents bomb explosion, by blocking the
  signals . By using the cell phone jammers we can
  restrict the communication network between the
  anti-social elements . Cell phone jammers prevent
  the students from carrying cell phones to the
  examination halls for mass copying.

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