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    FM TRANSMITTER AS A JAMMER

    A

    MINI PROJECT REPORT

    Submitted by

    Mr. KUMAR ABHISHEK (2009EEC13)

    in partial fulfilment for the award of the degree

    of

    BACHLEOR OF TECHNOLOGY

    IN

    ELECTRONICS & COMMUNICATION ENGINEERING

    At

    SCHOOL OF ELECTRONICS AND COMMUNICATIONENGINEERING

    SHRI MATA VAISHNO DEVI UNIVERSITY

    KATRA

    NOVEMBER 2011

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    FM TRANSMITTER AS A JAMMER

    A

    MINI PROJECT REPORT

    Submitted by

    Mr. AMAN KUMAR JHA

    (2009EEC20)

    in partial fulfilment for the award of the degree

    of

    BACHLEOR OF TECHNOLOGY

    IN

    ELECTRONICS & COMMUNICATION ENGINEERING

    At

    SCHOOL OF ELECTRONICS AND COMMUNICATION

    ENGINEERING

    SHRI MATA VAISHNO DEVI UNIVERSITY

    KATRA

    NOVEMBER 2011

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    FM TRANSMITTER AS A JAMMER

    A

    MINI PROJECT REPORT

    Submitted by

    Mr. MOTI LAL

    (2009EEC21)

    in partial fulfilment for the award of the degree

    of

    BACHLEOR OF TECHNOLOGY

    IN

    ELECTRONICS & COMMUNICATION ENGINEERING

    At

    SCHOOL OF ELECTRONICS AND COMMUNICATION

    ENGINEERING

    SHRI MATA VAISHNO DEVI UNIVERSITY

    KATRA

    NOVEMBER 2011

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    Certificate

    This is to certify that the Mini project Report entitled FM TRANSMITTER AS A JAMMER beingsubmitted by AMAN KUMAR JHA (2009EEC20) to the School of Electronics and Communication

    Engineering, for the award of Bachelor of Technology Degree in Electronics and Communication, is a

    bona-fide work carried out by him under the supervision and guidance of the undersigned.His

    Seminar-Report has reached the standard of fulfilling of requirements of the regulations related to

    degree.

    We wish best for his endeavor.

    Asst. Prof. S.B KOTWAL Dr. VIPAN KAKKAR

    PROJECT CO-ORDINATOR, SECE Director ,SECE

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    Certificate

    This is to certify that the Mini project Report entitled FM TRANSMITTER AS A JAMMER being

    submitted by MOTI LAL (2009EEC21) to the School of Electronics and Communication Engineering,

    for the award of Bachelor of Technology Degree in Electronics and Communication, is a bona-fide

    work carried out by him under the supervision and guidance of the undersigned.His Seminar-Report

    has reached the standard of fulfilling of requirements of the regulations related to degree.

    We wish best for his endeavor.

    Asst. Prof. S.B KOTWAL Dr. VIPAN KAKKAR

    PROJECT CO-ORDINATOR, SECE Director ,SECE

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    Certificate

    This is to certify that the Mini project Report entitled FM TRANSMITTER AS A JAMMER being

    submitted by SHUBHAM SAKHUJA (2009EEC33) to the School of Electronics and Communication

    Engineering, for the award of Bachelor of Technology Degree in Electronics and Communication, is a

    bona-fide work carried out by him under the supervision and guidance of the undersigned.His

    Seminar-Report has reached the standard of fulfilling of requirements of the regulations related to

    degree.

    We wish best for his endeavor.

    Asst. Prof. S.B KOTWAL Dr. VIPAN KAKKAR

    PROJECT CO-ORDINATOR, SECE Director ,SECE

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    ABSTRACT

    Cell phones and radio receivers are used everywhere these days. It's great to be able to call

    anyone anytime. But unfortunately, restaurants, movie theatres, concerts, shopping malls and

    churches all suffer from the spread of cell phones because not all cell-phone users know

    when to stop talking. While most of us just grumble and move on, some people are actually

    going to extremes to retaliate.

    Communication Jammer can be one of the solutions to this problem.

    A transmitter is a device from which signal is transmitted into free space, after insertion of

    suitable carrier, i.e. is superimposed on a high frequency-sine wave. Jamming a signal whose

    frequency is known, and which is fixed.Every radio broadcast (AM, FM, or short-wave) has a certain characteristic frequency. Each

    radio channel has a different frequency, which can be from around 1 million cycles per

    second for AM radio to 100 million cycles per second, for FM. This frequency is determined

    by the broadcast transmitter and basically is how many times per second the radio signal

    wave oscillates.

    When we pick up a radio signal, we "tune" our radio to the frequency of the broadcast

    transmitter. The way to jam a radio broadcast is to radiate a signal at that same frequency, but

    which is stronger than the one of the broadcast transmitter. Then, since the radio is tuned to

    that frequency, we'll pick up the jamming signal rather than the one we were hoping to

    receive.

    Major application of Jammer includes controlling a hostage situation in which police can

    control when and where a captor can make a phone call. Police can block phone calls during

    a drug raid so suspects can't communicate outside the area. Cell-phone jammers can be used

    in areas where radio transmissions are dangerous, (areas with a potentially explosive

    atmosphere), such as chemical storage facilities or grain elevators. Moreover it can be used in

    places like Hospitals, restaurants, movie theatres, concerts, shopping malls and churches

    where silence is required.

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    ACKNOWLEDGEMENTS

    I would like to express our deep sense of gratitude to our project guide, Asstt. Prof.

    S.B.Kotwal for encouraging us to undertake this project as well as providing all the necessary

    guidance and inspirational support throughout this project. I deem it my privilege to have

    carried this project under his valuable guidance.

    I am also grateful to other members of the ECE department who co-operated with me

    regarding some critical issues.

    I am also indebted to my friends for always being there with all their help and support.

    Last, but not at all the least, i thank God, the almighty for his blessings in the course of this

    work.

    KUMAR ABHISHEK

    2009EEC13

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    ACKNOWLEDGEMENTS

    I would like to express our deep sense of gratitude to our project guide, Asstt. Prof.

    S.B.Kotwal for encouraging us to undertake this project as well as providing all the necessary

    guidance and inspirational support throughout this project. I deem it my privilege to have

    carried this project under his valuable guidance.

    I am also grateful to other members of the ECE department who co-operated with me

    regarding some critical issues.

    I am also indebted to my friends for always being there with all their help and support.

    Last, but not at all the least, i thank God, the almighty for his blessings in the course of this

    work.

    AMAN KUMAR JHA

    2009EEC20

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    ACKNOWLEDGEMENTS

    I would like to express our deep sense of gratitude to our project guide, Asstt. Prof.

    S.B.Kotwal for encouraging us to undertake this project as well as providing all the necessary

    guidance and inspirational support throughout this project. I deem it my privilege to have

    carried this project under his valuable guidance.

    I am also grateful to other members of the ECE department who co-operated with me

    regarding some critical issues.

    I am also indebted to my friends for always being there with all their help and support.

    Last, but not at all the least, i thank God, the almighty for his blessings in the course of this

    work.

    MOTI LAL

    2009EEC21

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    ACKNOWLEDGEMENTS

    I would like to express our deep sense of gratitude to our project guide, Asstt. Prof.

    S.B.Kotwal for encouraging us to undertake this project as well as providing all the necessary

    guidance and inspirational support throughout this project. I deem it my privilege to have

    carried this project under his valuable guidance.

    I am also grateful to other members of the ECE department who co-operated with me

    regarding some critical issues.

    I am also indebted to my friends for always being there with all their help and support.

    Last, but not at all the least, i thank God, the almighty for his blessings in the course of this

    work.

    SHUBHAM SAKHUJA

    2009EEC33

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    TABLE OF CONTENTS

    CHAPTER NO. TITLE PAGE NO.

    ABSTRACT ii

    ACKNOWLEDGMENT iii

    1. INTRODUCTION

    1.1 Jamming : Good or Bad 1

    1.2 Terminology Used 2

    1.3 History Associated with Jamming 3

    2. FM MOULATION AND JAMMING

    2.1 Jamming Technique 4

    2.2 Blocks in our Project 4

    2.3 FM Modulation and Jamming 5

    2.3.1 Modulation Technique 5

    2.3.2 Colpitts Oscillator 6

    2.3.3Signal Generation and Amplification 8

    2.3.4 Capture Effect 10

    2.3.5 Circuit Diagram 11

    2.3.6 Result 11

    2.3.7 Application 12

    APPENDICES

    REFERENCES

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    CHAPTER 1: INTRODUCTION

    1.1Jamming : Good or Bad

    Cell phones are used everywhere these days. Ac

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