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.
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.
Mobile Jammer
Block Diagram of Mobile Jammer
The block diagram of the mobile jammer mainly includes power supply, IF section and RF section with an antenna.
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.
Power Supply
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 & 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
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
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. The IF section is divided into three main sections which are
given below
- Noise generator
- Mixer
- Triangular wave generator
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.
The VCO output frequency is directly proportion to the input voltage,
hence 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 or we have the triangular wave form is the input then the
output will be extended to the specific range of frequency.
Mobile Jammer Circuit Diagram
The above circuit shows the mobile
jammer circuit diagram and it is simple & easy to analyze. 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. The three circuits are mentioned below
Mobile Jammer Circuit Diagram
- RF amplifier
- Tuning circuit
- Voltage controlled oscillator
As we can see that the transistor Q1,
and the two capacitors C4 & C5 and also with one resistor can
compose the RF amplifier. By using the tuned circuit the RF amplifier
amplifies the signal and the amplification signal is given to the
antenna with the help of the capacitor C6 this 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 and
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.
The operation of the tuned circuit is
easy to learn & understandable. If the tuned circuit is ON then the
voltage is stored by the capacitor according to the capacity and the
electric energy is the main function of the capacitor. Once the
capacitor is fully charged it will allow the charge to flow through an
indicator. Basically the inductor is used to store the magnetic energy
through this voltage across the capacitor it will get decreased
automatically, at the same time 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. After some period of
time capacitor is charged completely and the magnetic energy
transversely the inductor will be zero. Once again the capacitor will
produce the charge to the inductor and becomes zero. After some time
interval the capacitor will be charged with the help of an inductor and
the capacitor will become 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 and
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 which 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.
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.
Working of Mobile Jammer
This causes the obstruction with the
communication of cell phones and towers to make the cell phones not
viable and there is no network visibility. Hence it works in both ways
i.e. Cell phone to the tower frequency and the other one is tower to
mobile frequency.
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
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.
This article is about the tutorial on
how mobile jammer works and applications. I hope the given information
in the article is helpful to give some good information and
understanding the concept. For furthermore, if you have any queries
regarding this concept or to implement electrical and electronic projects you can comment in the below section. Here is a question for you, Why we can’t use the mobile jammer on airplanes?
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