Intelligent Cell Phone Detector System at 4g Bands Of Frequencies
Himanshu Verma, Rudra Dev Tiwari, Sarvesh Kumar Mishra, Shubham Srivastava, Amit Kumar Singh, Harikesh Tripathi · IOSR Journal of Electronics and Communication Engineering · 2017
This handy, pocket-size mobile transmission detector or sniffer can sense the presence of an activated mobile cell phone from a distance of one and-a-half meters.So it can be used to prevent use of mobile phones in examination halls, confidential rooms, etc.It is also useful for detecting the use of mobile phone for Spying and unauthorized video transmission.The circuit can detect the incoming and outgoing calls, SMS and video transmission even if the mobile phone is kept in the silent mode.The moment the Bug detects RF transmission signal from an activated mobile phone, it starts sounding a beep alarm and the LED blinks.The alarm continues until the signal transmission ceases.Assemble the circuit on a general purpose PCB as compact as possible and enclose in a small box like junk mobile case.Carefully solder the capacitor in standing position with equal spacing of the leads.The response can be optimized by trimming the lead length of C3 for the desired frequency.You may use a short telescopic type antenna.The use of the cell phone has made communication easier and faster, integrating the world into a global village as people who are in different geographic location are connected in seconds, it's great to be able to call anyone at any time.There is great need to limit the use of cell phones at particular places and at particular time.Hence, the use of intelligent mobile phone detector is needed.This work concentrates in designing a system that will dictate the presence of GSM signals from an unauthorized user in restricted areas.