jammer Final Report Jordan University of （干扰机最终报告约旦大学）.pdf

Faculty of Engineering Department of Electrical Engineering Undergraduate project Dual Band Mobile Jammer for GSM 900 GSM 1800 Done by: Ahmed Sudqi Hussein Abdul-Rahman Ahmad Nasr Raja Mohammad Supervised by: Prof. Nihad Dib 1 Table of contents Abstract ………….…3 1. Introduction ……………4 2. Jamming Techniques …………………………5 3. Design Parameter…………………………………6 4. System Design 8 4.1 Power Calculation 8 4.2 Parts of the Jammer Device 8 4.2.1 The Power supply ……………………………….…………………………..………9 4.2.2 The IF-section ……………….………………………….…………………..………10 4.2.3 The RF-section …………………………..………..……………………….…….17 5. Results 22 Conclusions 24 References 25 Appendix 26 2 Abstract This report presents the design, implementation, and testing of a dual-band cell-phone jammer. This jammer works at GSM 900 and GSM 1800 simultaneously and thus jams the three well-known carriers in Jordan (Zain, Orange, and Umniah). This project went through two phases: Phase one: studying the GSM-system to find the best jamming technique, establishing the system design and selecting suitable components. Phase two: buying all the needed components, drawing the overall schematics, fabricating the PCB layout, assembling the devices, performing some measurements and finally testing the mobile jammer. The designed jammer was successful in jamming the three carriers in Jordan as will be shown at the end of this report. 3 1. Introduction Communication jamming devices were first developed a