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Cell Phone Jammer

By

M. Swapna09J95a0402

Shri Mata Vaishno Devi University, Katra 2

ContentsIntroductionTypes of JammerHow Jammer WorksWhat inside JammerApplications of JammerFuture scope of Jamming TechnologyCell Phone Detector IntroductionBlock DiagramApplicationConclusion

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IntroductionCell phone jammers are devices that create a temporary "dead zone" to all cell phone traffic in their immediate proximity

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Jamming techniquesType "A" Device: JAMMERS

Type “B” Device: INTELLIGENT CELLULAR DISABLERS

Type “C” Device: INTELLIGENT BEACON DISABLERS

Type “D” Device: DIRECT RECEIVE & TRANSMIT JAMMERS

Type “E” Device: EMI SHIELD - PASSIVE JAMMING

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How Jammer WorksA jamming device transmits - same radio

frequencies of greater power as the cell phone, disrupting the communication between the phone and the cell-phone base station in the tower. It's a called a denial-of-service attack.

.....Jamming basics....

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This causes interference with communication of cell phones and towers to render the phones unusable. On most phones, the network would be out of range.

So Jammers work by either disrupting phone to tower freq.. or tower to phone frequencies.

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Design Parameters/ Specification

Free space loss {F}= Path Loss (dB)= 32.44 + 20 log D(km) + 20log f(MHz)

The frequency bands

Distance to be jammed (D)

Pj Gjr Grj R2tr Lr Br

Jamming–to-signal ratio {J/S}= Pt Gtr Grt R2

jr Lj Bj

 

 Power calculations

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Block Diagram

If section Rf sectionJamming signals

Power supply

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Power supply

TransformerRectifier Regulatorfilter

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IF section

Triangular wave generator Noise generator

Mixer summer “Summer”

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Rf section

Voltage Controlled Oscillator

Power Amplifier

Antenna

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Application

To maintain the complete silence in library and lecture hall

To avoid fraud in examination hallTo avoid disturbance in class roomFor providing security in business conference,

board of directors rooms, seminars, etc., For providing calm and peaceful atmosphere in

Hospitals Church/Mosques/Cathedral/Temple/Religious

establishment

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Future scope of Jamming Technology

While the law clearly prohibits using a device to actively disrupt a cell-phone signal, there are no rules against passive cell-phone blocking.

Companies are working on devices that control a cell phone but do not "jam the signal.

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Cell phone detector

Introduction

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Block Diagram

Power Supply

I.F Section RF Section Signal

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ApplicationsCell-phone alerter (detector) is useful

that indicate the presence of a cell-phone signal. These can be used in hospitals where cell-phone signals could interfere with sensitive medical equipment. When a signal is detected, users are asked to turn off their phones or Jamming can be used.

It is useful airport.It is useful in class rooms and examination

hall.It is useful wherever cell phone can

disturb.

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ConclusionEvery technology has good aspect as well as bad aspect the

important thing is ,how we are using it.

Cell phone jammers are very useful to the society from the anti-social elements. We can save our national leaders. we can restrict the communication network between the anti-social elements by using the cell phone jammers. Cell phone jammers prevent the students from carrying cell phones to the colleges. As every thing goes fine, it is very necessary to implement in all the colleges

References[1] www.HowStuffWorks.com[2] en.wikipedia.org/wiki/Mobile_phone_jammer

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QUERIESQUERI ES

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THANK YOU