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Design And Construction Of A Remote Controlled Tri–band Frequency Jammer.
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1.3 AIM
Design and construction of a remote controlled tri–band frequency jammer.
1.4 OBJECTIVES
The main objective of this project include:
i. To design a remote control system of the circuit
ii. To design Intermediate Frequency (IF) section of the circuit.
iii. To design Radio Frequency (RF) section of the circuit.
iv. To design and construct a wireless signal jammer circuit.
v. To block mobile phone transmission by creating interference within the range of the jammer.
1.5 SIGNIFICANCE OF PROJECT
The major significance of this in communication is the reduction in the crime and espionage that are cell phone related such as academic cheating, industrial espionage, privacy invasion, organized theft etc. Although not without its legal issues and downsides, its method of working i.e. the denial of service has been very effective.
1.6 METHODOLOGY
This project work presents an operational frequency jammer. Three sections will be designed and integrated to form a complete circuit. The circuit will consist of the IF section, the RF section and power supply unit. The RF section which will consist of the Voltage Controlled Oscillator (VCO) using the ATMEGA328P microcontroller, the RF power amplifier and the antenna. The IF section will generate the tuning signal for the VCO in the RF section which will sweep the desired range of frequencies. The tuning signal will be generated by a triangle wave generator along with a noise generator and then offset by a proper amount so as to sweep the VCO output from the minimum desired frequency to a maximum. The jammer will be designed for fixed use thus taking its power from the regular 220V AC wall outlet. A 5 volt power supply will be designed as the jammer requires different DC input voltages. These components will be selected according to the desired specification such that the frequency range (800MHz to 2100MHz band) and coverage range (10m) is achieved.
1.7 SCOPE OF WORK
The scope of this project is limited to 800MHZ, 188MHZand 2100MHZ withremote controlled systems and remote controlled system it covered 10m.
1.7.1 OPERATIONAL DEFINITION OF TERMS
Jamming: A radio jammer is any device that deliberately blocks, jams or interferes withauthorized wireless communications. Jamming in wireless networks is defined as the disruptionof existing wireless communications by decreasing the signal-to-noise ratio at receiver sides through the transmission of interfering wireless signals.
1.7.2 Intermediate Frequency: In communications andelectronic engineering, an intermediatefrequency (IF) is a frequency to which a carrier wave is shifted as an intermediate step in transmission or reception.
1.7.3 Radio Frequency: Radio frequency (RF) is any of the electromagnetic wave frequencies that liein the range extending from around 3 kHz to 300 GHz, which include those frequencies used for communications or radar signals. RF usually refers to electrical rather than mechanical oscillations. Radiofrequency (RF) energy is another name for radio waves. It is one form ofelectromagnetic energy which consists of waves of electric and magnetic energy moving together (radiating) through space.
1.7.4 Antenna: It is an electrical device which converts electric power into radio waves, and viceversa. It is usually used with a radio transmitter or radio receiver.
1.7.5 Voltage Controlled Oscillator: It is anelectronic oscillatorwhoseoscillation frequencyiscontrolled by a voltage input. The applied input voltage determines the instantaneous oscillation frequency. Consequently, modulating signals applied to control input may cause frequencymodulation (FM) or phase modulation (PM)
1.8 OUTLINE OF THESIS
This report is structured into five chapters for better understanding of how the aim of the project was achieved. Chapter one gives an introduction to the report stating the significance of the project, aim, objectives, the proposed procedure for carrying out this project work and the way the report is generally presented. Chapter two presents the literature review and the theoretical framework. Chapter three presents the methodology and equations used in the design, simulation and construction. Chapter four presents the results of the design. The findings and conclusion are presented in chapter five.
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ABSRACT - [ Total Page(s): 1 ]ABSTRACT COMING SOON ... Continue reading---
APPENDIX A - [ Total Page(s): 1 ]APPENDIX AList of Components• Vero Board • Connecting wire • Power Switch • 30 Amps Fuse • Soldering Lead • Soldering Iron • LEDs • 240V/ 60V Transformer • 12 volts D.C battery • • IN9004, IN4004.1 diode, • 750 Ω, 750.1Ω, 100Ω, 1KΩ, 2KΩ, 22KΩ, 100KΩ, 1KΩ, 2KΩ, 22kΩ resistors • 555 timer • ... Continue reading---
APPENDIX B - [ Total Page(s): 2 ] ... Continue reading---
CHAPTER TWO - [ Total Page(s): 3 ]CHAPTER TWOLITERATURE REVIEW AND THEORETICAL FRAMEWORK2.1 INTRODUCTIONWireless networking plays an important role in achieving ubiquitous computing where network devices embedded in environments provide continuous connectivity and services, thus improving human’s quality of life. However, due to the exposed nature of wireless links, current wireless networks can be easily attacked by jamming technology. Jamming can cause Denial-of- Service (DoS) problem which may result in several o ... Continue reading---
CHAPTER THREE - [ Total Page(s): 11 ]The operation of power supply is as shown:The transformer which transforms 220V AC to other levels of voltages. Its functions are outlined below:i. Rectification: Convert the AC voltage to DC voltage.ii. Filtering: “Eliminate the noise†so that a constant DC voltage is produced. This filter is just alarge capacitor used to minimize the ripple in the output.iii. Voltage Regulation: It provides the desired DC voltage.The step down transformer steps down the input volt ... Continue reading---
CHAPTER FOUR - [ Total Page(s): 5 ]The bar chart in figure 4.9 above shows the jamming strength of the jammer at Eigbejila, Odota and Garin Alimi area of Ilorin west Local government area kwara State, Nigeria. It is obvious from table 4.2 above that as the distance between the cell phone and the base station increases, the effective jamming distance increases. This is due to the fact that the amount of power reaching the cell phone from the base station decreases as the cell phone moves farther from the base station and vice ve ... Continue reading---
CHAPTER FIVE - [ Total Page(s): 1 ]CHAPTER FIVECONCLUSION, CHALLENGES, RECOMMENDATION 5.1 ConclusionsThis project is very useful for mobile phones restricted places such as private meetings, examination hall, defense establishments, military camp, Hospitals; Petrol pumps, Libraries etc. This device can scramble/jam mobile devices in a given area within the operating frequency range of 800MHz - 2100MHz at the range of 2-7 meters. The designed device works in Tri-band. It jams the GSM 800 band, GSM 1800 band and the add ... Continue reading---
REFRENCES - [ Total Page(s): 1 ]REFERENCES1. Science Journal of Physics ISSN: 2276-6367 http://www.sjpub.org/sjp.html.2. Radio Jamming", Wikipedia Foundation, Inc. 2012. 3. "Electronic Warfare", Wikipedia Foundation, Inc. 2012. 4. "Electronic Counter-Countermeasures", Wikipedia Foundation, Inc. 2012. 5. Scourias, John (1997): Overview of the Global System for Mobile Communications, University of Waterloo.6. "Mobile Phone Jammers", Wikipedia Foundation, Inc. 2012.7. Semiconductor device ... Continue reading---
