Cascaded GSM Detector-Jammer Design

Recently, communication and technology are emergently increased with the assistance of electronic devices, which are widely used in erroneous ways such as in the examination halls, confidential rooms, and so on. Among the electronic devices one of them may be the use of mobile phones. The unauthorized use of mobile phones is a dominant problem in different sectors of society. These devices are a significant threat to security and the monitoring process even inside the prison. The proposed system is very helpful in places where the use of cell phones is hardly permitted. Spying and unauthorized video transmission can be detected and blocked by this suggested design. The proposed system can detect as well as block incoming and outgoing calls, messages, and video transmissions even if the mobile phone is in soundless mode. This pocket-sized cascaded detector-jammer circuit described here using LM358 IC can identify the presence of mobile phones by detecting the RF transmission signal in the frequency ranges of 2G, 3G, and 4G networks and can block the signals of the same frequency range.