jammerstore's Blog

　　Prison signal shielding technology is widely used to prevent people inside prisons from engaging in illegal activities through mobile phones, especially telecommunications fraud. However, although this measure is crucial to prison safety, signal shielding has a significant impact on the normal lives of residents around prisons. cell phone jammer This article explores the background of the use of signal shielding technology and its impact on residents in surrounding areas, and discusses the responsibilities and challenges of relevant operators at the legal and technical levels. GPS jammer

　　Background and legal provisions of signal shielding

　　With the widespread popularity of mobile communication technology, mobile phones have become an important tool for prisoners to communicate illegally with the outside world. Wifi jammer This not only threatens the security of prison management, but also makes outsiders vulnerable to criminal acts such as telecommunications fraud. In order to solve this problem, many countries have introduced signal shielding technology to prevent the spread of mobile phone signals inside prisons. signal jammer Taking Costa Rica as an example, Article 49 of the General Telecommunications Law clearly stipulates that telecommunications service providers are obliged to shield mobile phone signals in prisons and ensure that they do not affect communication services in areas surrounding prisons.

　　This legal provision places high technical requirements on telecommunications service providers, because they must not only ensure signal shielding inside prisons, but also avoid interfering with the normal communications of users in surrounding areas. The law, passed in 2018, aims to strictly restrict wireless telecommunications services in prisons through technical means, but its complexity also brings many challenges to practical operations.

　　Real-life user troubles

　　Take user Glenda Cabrera Valverde as an example. Her case reveals the impact of prison signal blocking on ordinary users. On January 31, Cabrera and her husband were driving through Boaz, Alajuela, when they suddenly lost their mobile phone signal and could not even send messages through the network. She did not realize at first that she had passed through a signal-blocked prison area, and found that the problem still existed after returning home. After contacting telecom operator Claro several times, she learned that her mobile phone signal was blocked because she passed through a shielded area near the prison.

　　This phenomenon is not an isolated case, especially when users near the prison experience long periods of signal interruption without knowing it. Similar to Cabrera, many residents may miss important work calls or lose contact with the outside world due to the blocking effect, bringing inconvenience to their lives.

　　Recently, a robbery case that has attracted widespread attention occurred in Neuquen Province, Argentina. The suspect used a signal jammer to circumvent the vehicle alarm system and successfully carried out theft. signal jammerThe police conducted multiple raids during the investigation and finally successfully arrested the suspect and seized relevant criminal tools and equipment.cell phone jammer

　　Brief description of the case: High technology promotes traditional crime

　　The case began with a report from a resident. When the victim returned to his home in Junín de los Andes in the afternoon, he found that some valuables and cash had been stolen from his car parked on the roadside. GPS jammerAfter preliminary investigation, the police found that the vehicle was not forced open, which ruled out the suspicion of traditional theft tools. As the investigation deepened, the police suspected that a signal jammer was used in the robbery.Wifi jammer

　　After parking the car, the victim used a remote control to lock the car and activated the alarm system, but he did not manually confirm whether the vehicle was actually locked. It was this loophole that gave criminals an opportunity to take advantage of. They blocked the signal of the alarm system through a signal jammer, causing the owner to misjudge.

　　Raid: Initial collapse of criminal network

　　The police finally locked the suspect and the vehicle he was driving by analyzing the surveillance video around the scene. After obtaining key information, the police applied for two search warrants, one for the suspect's residence in Junín de los Andes and the other for another property in the capital of Neuquén.

　　During the raid, the police not only arrested the suspect, but also seized a variety of electronic devices, computers, ammunition and other evidence, including signal jammers. These devices further verified the fact that the suspect used modern technology to commit crimes.

　　The criminal risks of signal jammers

　　The use of signal jammers in robbery cases is not the first time, but the exposure of this case has once again aroused social attention to the legality of such devices. Signal jammers were originally used for legal confidentiality or to prevent communication leaks, but on the black market, such devices were traded and abused by criminals and became a powerful tool for committing high-tech crimes.

　　In this case, the suspect used a signal jammer to block the vehicle's alarm system, resulting in the owner's failure to effectively prevent property losses. This method highlights the evolution of criminal methods, and traditional anti-theft devices are powerless in the face of signal jammers. This not only requires car owners to be vigilant, but also puts higher technical response requirements on law enforcement agencies.

　　Future Challenges: The Necessity of Combating Technological Crimes

　　The emergence of signal jammer crimes reflects the increasing complexity of technological crimes. In order to deal with these new types of crimes, law enforcement agencies need to constantly update technical means and combine them with laws and regulations to crack down on the illegal use of signal jammers.

　　Signal jammers, as a technical tool, have been widely used by criminals to commit car thefts in recent years, especially in the frequent "asphalt pirate" crimes in Argentina and other places.signal jammer This technology not only changes the traditional way of stealing cars, but also makes it easier and faster for criminals to succeed. However, behind this new crime model, there are a series of complex technical means and social problems.cell phone jammer

　　1. Working principle of signal jammers

　　The core function of signal jammers is to block wireless communication between cars and car owners by transmitting interference signals.GPS jammer In most modern cars, car owners use remote control keys to lock the car, and the signal sent by the remote control communicates with the receiving system in the car to activate the alarm system and lock the doors. Signal jammers transmit interference signals with the same frequency as the car alarm system, so that the remote control signal cannot be transmitted to the car normally, causing the owner to think that the car door has been locked, but in fact the car door is not really locked.

　　Typically, the effective range of signal jammers can reach 40 to 50 meters, which means that criminals do not need to get close to the target vehicle, and can achieve interference by remote operation in the parking lot. This method not only makes it difficult for car owners to detect, but also brings great difficulties to the police in solving the case.

　　2. Evolution of crime patterns and case analysis

　　Signal jammers were first used in car theft crimes in Cordoba Province, Argentina, and then quickly spread to large cities such as Buenos Aires. Criminals usually choose large shopping malls, supermarkets and other public places with large traffic as the crime scene. Car owners often neglect to check whether the car doors are really locked when shopping, which gives criminals an opportunity to take advantage of.

　　A typical case occurred in the Villa Urquiza area of ​​Buenos Aires. A businessman Sebastian and his wife went shopping in a shopping mall in the suburbs. When they locked the car and entered the mall, the car's alarm system and locking function were actually blocked by the jammer, and the car door was not really locked. The criminals took advantage of this loophole to easily enter the vehicle, steal the items in the car and obtain Sebastian's home address, and then carried out a burglary.

　　This case reveals the key role of signal jammers in the implementation of efficient and organized car theft crimes. Criminals can easily obtain property inside the car without damaging the exterior of the car, and even further commit burglary.

　　3. Technology Source and Market Demand

　　The widespread use of signal jammers is inseparable from their low cost. These devices are usually imported from China through black market channels, with prices ranging from $100 to $400, and some advanced devices cost up to thousands of dollars. However, in recent years, due to the development of technology and the increase in market demand, the price of jammers used by criminals has dropped to a more civilian level, and some hand-assembled devices cost as low as around $1,000.

　　According to reports from the Argentine security department, car theft gangs often use these portable jammers to commit crimes, and the equipment is small and easy to hide, which further increases the difficulty of police arrest. Although it is not illegal to own a jammer, once it is used for crime, criminals will be punished by law.

　　4. Impact on society and safety hazards

　　The increasing rampant crime of car theft with signal jammers has aroused widespread concern from all walks of life. Especially in large cities and public parking lots, car owners often neglect to check the safety of their vehicles when they go out shopping or doing business, giving criminals an opportunity to take advantage. Data shows that car thefts in Buenos Aires, Argentina, were on the rise in 2018, with an average of 3.5 cases per day.

　　In addition, the use of signal jammers has also extended to other criminal areas. For example, high-value goods on freight trucks are often targeted by criminals. In 2017, a large-scale cargo theft occurred in Argentina, in which criminals used signal jammers to hijack a truck carrying nearly a thousand Playstation 4 game consoles, involving hundreds of thousands of dollars.

　　V. Countermeasures and prevention suggestions

　　In the face of the safety hazards brought by signal jammers, car owners can take a series of preventive measures to reduce the risk of theft. The first and simplest measure is to personally check whether the car door is really closed after locking the car every time, instead of just relying on the "beep" sound of the remote control to confirm whether the car door is locked. This simple action can effectively prevent the door from being unlocked due to signal jammers.

　　Secondly, when parking, you should choose an area with good visibility and dense traffic, and try to avoid parking in remote places. In addition, when parking, try to minimize the storage of valuables in the car, especially documents, keys and other items, which should be carried with you to avoid giving criminals an opportunity to take advantage of them.

　　In addition, the government and parking lot management can also take a series of measures, such as installing high-definition cameras in the parking lot, strengthening the monitoring of vehicle entry and exit, and setting up safety reminder signs when necessary to remind car owners to pay attention to vehicle safety.

　　The New Bilibid Prison (NBP) in the Philippines has long been a hub for drug trafficking, with inmates using smuggled cell phones to continue to manipulate drug trade. signal jammer Despite a series of government measures, including the installation of signal jammers, drug lords are still able to stay in touch with the outside world through their phones and control operations outside the prison. cell phone jammer This problem not only exposes the security loopholes of the Philippine prison system, but also reveals corruption in prison management. GPS jammer

　　Drug lords’ connection with the outside world

　　Through smuggled cell phones, inmates are able to continue to control drug trade outside the prison.Wifi jammer According to Arsenio Evangelista, president of the Volunteers Against Crime and Corruption (VACC), drug lords in prison are still able to direct drug trade through their cell phones. The problem of illegal drugs in prisons has become a major challenge in the Duterte government’s war on drugs, with the circulation of drugs in prisons making the government’s crackdown outside the prisons less effective.

　　Senator Panfilo Lacson showed screenshots of some inmates’ public posts on Facebook at a Senate hearing, including Raymond Dominguez, who was sentenced for robbery and murder. This shows that even in a high-security prison, prisoners are still able to communicate with the outside world through mobile phones. This is not only a challenge to prison management, but also a warning to the entire Philippine law enforcement system.

　　Limitations of signal jammers

　　Although the Philippine government has installed signal jammers in prisons, these devices have not achieved the desired effect. According to Evangelista, the jammers are turned off at certain times of the day, allowing prisoners to use their phones. This obviously weakens the role of the jammers, allowing prisoners to continue to manipulate drug transactions through their phones.

　　Senator Lacson questioned the management and use of jammers at the hearing, asking questions such as "Who controls the jammers?" and "Who can profit from it?" In fact, the management and use of jammers may have become a tool for corruption, and even technicians may profit from it. This makes the role of jammers not only weakened, but may even be used to facilitate illegal activities.

　　Corruption in prisons

　　The practice of smuggling mobile phones into prisons involves widespread corruption in prisons. According to witness Yolanda Camilon's husband Godfrey Gamboa, prison guards conspired with prisoners to bring contraband such as mobile phones and televisions into prisons. The smuggling of contraband has formed a black economy chain inside the prison, and prisoners obtain these items by bribing prison guards.

　　In addition to mobile phones, prisoners can also obtain food and other items by bribing guards. According to Gamboa, the price of these transactions depends on the mood of the prison guards and the amount of bribes they are willing to accept. This corruption makes prison management more complicated and hinders the government's efforts to combat drugs and contraband.

　　Government response

　　Although the Philippine government has taken some measures, such as installing signal jammers and strengthening security measures in prisons, the effect is limited. The lack of coordination between the Bureau of Prisons and the Philippine Drug Enforcement Agency has further weakened the fight against drugs and contraband. Evangelista pointed out that the Drug Enforcement Agency once had an office inside the prison, but the sudden withdrawal of the office made it impossible for the Drug Enforcement Agency to continue to effectively monitor drug transactions.

　　Against the backdrop of high violent crime rates, Pinheiro Prison in Santa Fe Province launched a cell phone jammer system in July 2023 to cut off prisoners' illegal communications with the outside world. signal jammer This article will explore in detail the implementation process of the technology, the challenges it faces, and future improvements.cell phone jammer

　　1. Background: The threat of prison-to-outside communication

　　In recent years, it has become a serious social problem for prisoners in prison to direct criminal activities outside the prison through mobile phones. GPS jammer Several shootings in Rosario in 2023 showed that criminal organizations in prisons used mobile phones to collaborate with external accomplices to plan a series of violent attacks and extortion incidents.Wifi jammer

　　Shootings in Rosario

　　Data from Santa Fe prosecutors show that 80% of shootings were issued through mobile phone commands inside the prison. These shootings, including violent attacks on Lionel Messi's family, highlight the current situation of uncontrolled communication management inside the prison.

　　The scale of communication abuse in prisons

　　Not only in Rosario, but in prisons throughout Santa Fe Province, prisoners are facing the problem of prisoners using mobile phones to plan crimes. In 2022, there were 288 murders in Rosario, 70% of which were carried out by prison orders. This phenomenon has become a problem that the local government needs to solve urgently.

　　2. Technical implementation and application of mobile phone jammers

　　Faced with the threat of illegal communications in prisons, Pinheiro Prison has introduced an advanced mobile phone signal jamming system. The system is designed to block all mobile phone signals inside the prison without affecting communication services outside.

　　Technical principle: how to block mobile phone signals

　　The jammer prevents mobile phones from connecting to the provider's network by emitting interference signals. These directional antennas are installed within the prison's security perimeter to ensure that only communications within the prison are affected, while external areas are not interfered with.

　　Challenges in implementation

　　Although the system has started to work, its effectiveness still needs further testing and calibration. For example, how to optimize the use of jammers without affecting legitimate communications in prisons (such as lawyer interviews and emergency handling) is still a problem that needs to be solved.

　　3. Future prospects: technological progress and policy adjustments

　　Although the deployment of mobile phone jammers has achieved initial results, the system still faces many challenges in the future with the development of communication technologies (such as 5G).

　　The proliferation of cell phones in Mexico City prisons has become a growing problem. Although the Federal District government installed signal jammers as early as 2010 in an attempt to prevent prisoners from using cell phones for criminal activities, it turns out that these devices have not achieved the desired effect. cell phone jammer Since 2006, more than 21,000 illegal cell phones have been seized in prisons in Mexico City, showing the failure of signal jammers and loopholes in prison management.GPS jammer

　　How prisoners get cell phones

　　There are many ways for prisoners to obtain cell phones, and corruption among prison security guards is one of the most serious problems. drone jammer According to relevant reports, some security guards inside the prison not only failed to prevent the entry of cell phones, but even directly participated in criminal activities to help prisoners obtain cell phones.

　　In a 2017 video investigation, a ransomware network was recorded operating smoothly in the prison through multiple cell phones, and the security guards acted as accomplices of this network. This situation shows that the management inside the prison is no longer effective in preventing illegal activities from happening, and the proliferation of cell phones has become a daily phenomenon.

　　The Diamond Module’s Cell Phone Dilemma

　　As Mexico City’s most secure prison module, the Diamond Module was designed to house the most dangerous criminals and prevent any unauthorized devices from entering. However, data shows that more than 1,000 cell phones were seized in the prison between 2012 and 2017. This number not only exceeds other prisons, but even larger prisons such as the South Prevention Prison and Santa Martha Acatitla Women’s Prison.

　　The Diamond Module is equipped with a three-layer security filtering system designed to prevent illegal devices such as cell phones from entering. However, even so, cell phones continue to flow into the prison, indicating loopholes in prison management and the failure of signal jammers.

　　Failure of signal jammers

　　In 2010, the Federal District government of Mexico announced an investment of more than 24 million pesos to install signal jammers to block the spread of mobile phone signals. However, six years later, the authorities know very little about the operation and maintenance of these devices. In accordance with government transparency requirements, both federal and local governments said they were not aware of the operation of these devices.

　　Local governments claimed that the equipment was installed and operated by the federal government, so they had no right to know the details of the equipment. The federal government said that local governments should be responsible for the prison's signal blocking system. The two sides shirked the responsibility, resulting in the problem never being solved.

　　The Chilean government recently announced that it will implement a new cell phone blocking system in some prisons starting March 19. The move aims to cut off prisoners from contact with the outside world, thereby preventing criminal activities in prisons.signal jammer However, the implementation of the blocking system not only involves technical and economic issues, but may also lead to legal disputes. cell phone jammer This article will explore the background, implementation challenges and potential impact of this new policy in Chile.GPS jammer

　　1. Policy background: the urgent need to curb crime in prisons

　　The use of mobile phones in Chilean prisons has become a hotbed for criminal activities. Prisoners use their mobile phones to communicate with the outside world, continue to engage in illegal activities such as drug trafficking and extortion, and even plan prison escapes.Wifi jammer This situation not only threatens the security of society, but also poses a serious challenge to prison management.

　　In response to this problem, Chilean President Gabriel Boric announced in November last year that the government will use appropriate technical means to block cell phone signals in prisons to curb criminal activities. The implementation date of March 19 marks the entry of this policy into the actual operation stage.

　　2. Technical features and scope of implementation of the new system

　　The core of the new system lies in its selective blocking function. Unlike the previous system that completely blocked the entire prison area, the new shielding system can identify every device in the prison and selectively block the mobile phone signals used by prisoners. This technological advancement reduces interference with residents and police officers outside the prison and improves the accuracy and effectiveness of the system.

　　The first implementation sites of the new system include the Santiago South Preventive Detention Center, the Santiago I Preventive Detention Center, and the Special High Security Prison Facility. It is expected to cover about 10,000 prisoners, accounting for 20% of the total prison population in the country. In addition, the Chilean government also plans to extend this system to 9 other prison institutions in the future, thereby achieving coverage of about 50% of the prison population in the country.

　　3. Economic cost and financial pressure

　　Although the new system is technologically advanced, its high cost has also brought considerable financial pressure to the Chilean government. According to estimates by Deputy Minister of Justice Jaime Gajardo, the government will spend more than 3 billion pesos in 2024 to implement the shielding system in the Pedro Monte area alone. If full coverage is to be achieved nationwide, it is expected to cost about 600 billion pesos, accounting for one-third of the annual budget of the gendarmerie.

　　Such a huge fiscal expenditure is undoubtedly a heavy burden for a developing country like Chile. The government must therefore give priority to some prisons for system deployment and gradually promote it in the next few years. This decision is not only about the rational allocation of fiscal resources, but also reflects the government's difficult balance between combating prison crime and maintaining economic stability.

　　4. Legal Challenges and Human Rights Disputes

　　In addition to technical and economic issues, the implementation of the mobile phone blocking system may also trigger legal challenges and human rights disputes. Should prisoners' communication rights be protected? This issue is still undecided internationally. In Chile, opponents believe that completely cutting off prisoners' contact with the outside world may violate their basic human rights, especially when there are no other alternative means of communication.

　　In addition, the blocking system may interfere with the communications of the gendarmerie and prison staff, further exacerbating security risks. How to find a balance between ensuring security and respecting human rights will be a major challenge that the Chilean government needs to face in the future.

　　5. Learning from international experience and Chile's future direction

　　Chile is not the first country to try to implement a mobile phone blocking system in prisons. El Salvador is a pioneer in this field in the region, and the country has passed legislation to force operators to block mobile phone signals in prisons. However, the experience of El Salvador shows that although the blocking system has curbed criminal activities to a certain extent, technical limitations, legal challenges and high costs remain insurmountable obstacles.

　　In recent years, with the widespread use of the Global Navigation Satellite System (GNSS), GPS signals have become an indispensable part of modern warfare and civilian life.signal jammer However, since December 2022, GPS jamming incidents in the western Russian cities of Saratov, Volgograd and Penza have increased sharply, marking Russia's tougher electronic warfare strategy in response to geopolitical threats. cell phone jammer This trend has not only affected Ukraine's drone operations, but also had a profound impact on global aviation security and geopolitical situations.GPS jammer

　　1. Background and motivations of GPS jamming incidents

　　As the Russian-Ukrainian conflict escalates, the security situation in Russia is becoming increasingly tense.Wifi jammer Especially in the context of frequent long-range drone attacks in Ukraine, Russia has taken a variety of defensive measures to protect its homeland security. GPS jamming may be one of the key strategies. The direct motivation for this jamming is to prevent Ukrainian drones that rely on GPS navigation from accurately striking Russian targets. Eric Kannick, project manager at SensusQ Defense Intelligence, pointed out that the scale of these jamming signals is unprecedented, covering hundreds of kilometers around tactical cities.

　　From a strategic perspective, Russia's move also reflects its technological development and practical capabilities in the field of electronic warfare. Interference with GPS signals can effectively weaken the enemy's combat capabilities, especially in drone operations that rely on high-precision navigation. This interference can not only prevent the navigation of drones, but also affect the enemy's communication, positioning and missile guidance systems, thereby weakening the enemy's overall combat effectiveness.

　　2. Technical Implementation and Impact Range of GPS Interference

　　Russia's GPS interference is mainly achieved through high-power jammers, which can cover a range of hundreds of kilometers, making it impossible for GPS receivers in the area to receive effective navigation signals. According to Aurora Insight's observations, GPS signal levels in western Russia have increased significantly since early December, and this change may be caused by interference. Although these interferences were initially concentrated around Moscow, since December 11, the interference range has rapidly expanded to include more areas such as Saratov, Volgograd and Penza.

　　These GPS interferences not only affect military targets, but may also cause significant interference to civil aviation, ground transportation and other industries that rely on GPS navigation. For example, the GPSJam system tracks global navigation satellite system (GNSS) problems by monitoring ADS-B signals emitted by aircraft. Although much of this interference is concentrated in areas where aircraft fly, discussions on Russian-language social media about ground-based GPS signal outages are also increasing, reflecting the expanding impact of interference.

　　Todd Walter, director of the Stanford University GNSS Laboratory, said that GPSJam is a "valuable resource" for tracking GPS interference, but its technology for monitoring using ADS-B data also has certain limitations. For example, it has difficulty detecting weak interference or interference on other frequencies. In addition, the fuselage of the aircraft may shield the interference source, making some local GPS jammers difficult to detect.

　　3. International Impact and Future Outlook of GPS Interference

　　The increase in Russian GPS interference incidents not only poses a direct threat to Ukraine, but also poses new security challenges to the international community. With the widespread use of GPS technology, countries are highly dependent on this technology in the military, aviation, navigation, finance and infrastructure fields. Russia's interference behavior may trigger other countries to take corresponding countermeasures, further exacerbating international tensions.

　　In addition, Russia's actions in the field of electronic warfare may trigger other countries to strengthen the protection of GPS signals and the development of alternative technologies. For example, the United States has begun to study the use of low-orbit satellites and multiple signal sources to enhance the anti-interference ability of navigation systems. Countries such as Europe and Japan are also actively promoting the development of local navigation systems to reduce their dependence on the US GPS system.

　　In the future, as the global geopolitical situation becomes more complicated, the security and stability of GPS signals will face greater challenges. Countries may increase their investment in the field of electronic warfare and develop more advanced jamming and anti-jamming technologies to ensure their technological advantages in future wars.

　　In recent years, Colombia's prison system has faced unprecedented challenges, one of which is the surge in extortion cases inside prisons, which has forced the government to reevaluate its use of signal jammers used to control communications. signal jammer However, due to the outdated technology of these jammers and the restrictions imposed by court orders on many occasions, Inpec (National Institute of Penitentiaries and Prisons) announced that it would stop using these devices. cell phone jammer This decision not only reveals the complexity of criminal activities inside prisons, but also reflects the country's dilemma in dealing with new criminal methods.GPS jammer

　　Limitations of signal jammers and reasons for closure

　　Signal jammers were once seen as an effective means to prevent prisoners from using their mobile phones for illegal activities, especially extortion. Wifi jammer However, over time, these devices have gradually exposed their limitations. Colonel Gutierrez Rojas, director of Inpec, pointed out that most of these jammers are based on old 3G technology and cannot cope with 4G and 5G signals. This means that criminals can easily bypass these jammers and continue to carry out criminal activities.

　　What's more serious is that the use of signal jammers not only affects the inside of prisons, but also causes trouble to the daily lives of surrounding residents. Due to the interference of signal jammers, residents near the prison frequently suffer communication interruptions, affecting their work and study. This situation has triggered a large number of complaints, which eventually led to the courts ordering the closure of these devices several times. Colonel Gutierrez Rojas admitted that these devices have now stopped working nationwide.

　　Government response and challenges

　　Faced with the increase in extortion cases in prisons, the Colombian government has had to take urgent measures to deal with this problem. The Attorney General's Office has asked the Ministry of Justice and Law, the Ministry of Information and Communications Technology, Inpec, and Gaula (military and police) to strengthen technical and human teams to actively respond to this phenomenon. However, due to the closure of signal jammers, the government faces greater challenges in combating these crimes.

　　In the absence of effective technical means, the government has to rely on other strategies to curb criminal activities in prisons. For example, Inpec is studying plans to isolate and transfer criminals to other detention centers to reduce the chances of them continuing to engage in illegal activities. In addition, the government also plans to build a special surveillance unit for repeat offenders to more effectively control their activities.

　　On March 8, 2021, the feminist protests in Mexico City attracted widespread attention, not only because of its scale and topics, but also because the Mexican government used drone jammers in the process. This technical means is used to restrict the activities of drones, aiming to protect sensitive areas from aerial surveillance. However, this move has caused widespread controversy among the public, both questioning the government's actions and exploring the technology itself.

　　Technical principles and characteristics of drone jammers

　　A drone jammer is a device specially designed to interfere with the communication between drones and their operators. cell phone jammer Its basic working principle is to generate interference signals on the radio frequencies used by drones by emitting high-power electromagnetic noise. signal jammer Specifically, these devices can block drones from receiving control signals from the operator, making it impossible to continue flying or transmitting video data.

　　Hikvision's Defender series drone jammers are a typical example. According to its specifications, the device has an interference range of 800 meters and a wide coverage area, and does not require precise aiming. It is designed to effectively restrict the activities of low-altitude drones without damaging other electronic equipment. These features make the Defender series ideal for protecting sensitive areas, especially where illegal drone flights need to be prevented.

　　Specific applications of drone jammers in women's rights protests

　　During International Women's Day 2021, the Mexican government used drone jammers to prevent drone flights over the protest site. Presidential spokesman Jesús Ramírez Cuevas explained that this was to protect the safe area around the palace and was not an action by the armed forces.

　　However, this action did not quell the controversy. During the protest, a photographer's drone was shot down by a jammer and he accused the government of suppressing freedom of information. Although the government emphasized that this was for public safety, the move undoubtedly raised questions about the legitimacy of the government's actions.

　　Social and legal impact

　　The use of drone jammers is not just a technical issue, but also involves a series of legal and social issues. In Mexico, although the Federal Telecommunications and Broadcasting Law does not directly mention the legality of drone jammers, its Article 190 bis prohibits the use of any device that blocks, cancels or eliminates radio communications except in cases of federal public safety and national security.