Signal Interference Explained: The Jammer Working Principle

Understanding the jammer working principle is crucial for grasping how signal jammers disrupt communication systems. Signal jammers are devices designed to block or interfere with the signals transmitted between devices and their sources, such as mobile phones, Wi-Fi routers, and GPS systems. The jammer working principle involves transmitting signals on the same frequencies used by the targeted devices, causing a denial-of-service effect that prevents communication. By understanding the jammer working principle, you can better recognize the impact of jamming on your mobile network and wireless connections. Whether for security, privacy, or control, knowing jammer how it works can help you assess their role and potential risks in various environments, such as schools or military operations.

Jammer Working Principle: What Is a Signal Jammer?

A signal jammer is a device designed to interfere with or block wireless communication signals, preventing devices from connecting or transmitting properly. The jammer working principle is based on the idea of sending out interference signals on the same frequencies as the targeted communication devices, thus disrupting their ability to maintain a connection. Signal jammers are used in various fields, including military, law enforcement, and commercial applications, to control or disable communication networks temporarily.

Definition of a Signal Jammer

A signal jammer, often referred to as a “cell phone jammer” or “wireless jammer,” is a tool that disrupts communication by transmitting on the same radio frequencies as mobile devices, Wi-Fi routers, GPS systems, or other wireless devices. This disruption can cause a denial-of-service effect, where the jammer device working being targeted is unable to send or receive calls, texts, or data. Signal jammers are designed to block specific signals in a given area, effectively disabling communication for devices within range.

Overview of Types of Jammers

There are several types of jammers, each serving different purposes depending on the type of signals they target. The most common types include:

Cell Phone Jammers

These jammers block mobile phone signals, including voice calls, text messages, and data transmissions. They can affect multiple networks such as GSM, CDMA, and LTE. Cell phone jammers are often used in places where phone use is prohibited, such as theaters, schools, or government buildings.

Wireless Jammers

Wireless jammers are designed to block or interfere with Wi-Fi, Bluetooth, and other wireless communications. They can prevent devices such as laptops, tablets, or GPS systems from establishing or maintaining connections with their network or satellite systems. These jammers are commonly used in environments where securing networks or preventing unauthorized access is crucial.

GPS Jammers

GPS jammers are used to block GPS signals, which can prevent GPS devices from receiving location data. This type of jammer is often used in security-sensitive areas, such as military installations, to prevent unauthorized tracking or surveillance.

General Uses of Jammers

Signal jammers have a variety of applications, particularly in military and law enforcement, where they play a critical role in controlling or disrupting communication channels. The jammer working principle allows these devices to selectively block communication in strategic areas, preventing certain signals from reaching their targets.

Military Applications

In the military, signal jammers are commonly used to disrupt enemy communications, including mobile phones and satellite communications. By blocking signals in enemy territory, military forces can limit the enemy’s ability to coordinate operations and gather intelligence. Jammers also play a role in preventing the use of remote-controlled devices such as bombs, by interfering with the signals used to trigger explosives.

Law Enforcement Applications

Law enforcement agencies use signal jammers in specific operations to control the use of communication devices in certain areas. For instance, during hostage situations or tactical operations, jammers can be used to block cell phone signals, preventing potential threats from communicating. These devices can also be used in prisons to stop illegal cell phone use.

Commercial Applications

Commercial use of signal jammers is also widespread. For example, businesses may use jammers to prevent mobile phone usage during meetings or in areas where focus and productivity are crucial. They are also employed in areas like movie theaters, concert halls, and other public spaces to ensure that mobile phones do not disrupt the experience.

Understanding the jammer working principle is essential to comprehending how these devices impact communication systems. Whether for military, law enforcement, or commercial purposes, jammers function by emitting signals that interfere with or block wireless communication. As these devices continue to be used in various sectors, it is important to be aware of the legal and ethical considerations surrounding their use.

How Does Drone Jammer Work in Modern Applications?

Signal Jamming How Does It Work?

Signal jamming is a technique used to disrupt communication between devices and their intended signal sources. The jammer working principle is based on the interference of signals transmitted from a jammer device, which disrupts the communication channels that devices typically use to send and receive data. This disruption can range from a temporary block to a complete breakdown of the communication system within a particular area. To understand how signal jamming works, it is essential to delve into the basic mechanics and the processes involved.

Basic Working Principle

The core of the jammer working principle lies in the transmission of radio signals on the same frequencies used by the targeted devices. When a signal jammer is activated, it transmits a signal on the same radio frequency as the communication device, such as a mobile phone, Wi-Fi router, or GPS receiver. By sending signals that match or overlap with the frequencies of the devices in the vicinity, the jammer creates interference, effectively “drowning out” the device’s communication.

This interference prevents the device from receiving or sending signals to its source, resulting in a loss of communication. The target device might show a “no service” status or experience dropped calls, poor connectivity, or a complete failure to establish a connection.

Jamming Process

The jamming process involves two primary actions: blocking and degrading the strength of the communication signals.

• Blocking the Signal:
  When the jammer transmits its interference signal on the same frequency, it essentially blocks the communication signal from the device. This blocking action results in the device being unable to establish a stable connection with its network or satellite, effectively halting communication. This method is often used in situations where complete disruption of communication is desired, such as in military operations or during covert law enforcement activities.
• Degrading the Signal:
  In some cases, instead of fully blocking the signal, jammers can degrade the quality of the communication. This might result in weak or intermittent signals, making it difficult for the device to maintain a stable connection. Degraded signals are often used in environments where limited disruption is necessary, such as in theaters or conference rooms, where cell phones are discouraged but not entirely forbidden.

The “denial-of-service attack” is a key mechanism in this process. By transmitting an overwhelming signal that prevents devices from accessing their designated communication channels, the jammer effectively causes a denial of the ability to communicate, making it impossible for the targeted device to work properly.

Different Frequency Blocking

Jammers can vary in their ability to target specific frequencies, and understanding these differences is crucial for assessing their effectiveness.

• Single Frequency Jammers:
  Single frequency jammers are designed to block one specific frequency at a time. These jammers are generally less powerful than multi-frequency jammers, as they target only one frequency range, such as the GSM frequency for mobile phones. These jammers are typically used in more localized environments where blocking a single communication channel is sufficient to achieve the desired effect. For instance, a GSM jammer might be used in a specific area like a theater to prevent cell phone usage.
• Multi-Frequency Jammers:
  Multi-frequency jammers, on the other hand, are more complex and powerful. They can block multiple communication frequencies simultaneously, making them more effective in environments with a variety of devices that operate on different bands. For example, a multi-frequency jammer can block cellular, Wi-Fi, GPS, and Bluetooth signals at the same time, rendering a broad range of devices inoperable. These types of jammers are often used in high-security settings or in military operations where multiple communication channels need to be disrupted.

How Jammers Affect Devices Within Their Range

The impact of a jammer depends on its power, the number of frequencies it targets, and the proximity of the targeted devices. Devices within the jammer’s range will experience varying degrees of interference depending on these factors. For instance, if a jammer targets a single frequency and a device is operating on that frequency, the device will experience a complete loss of signal. If the jammer is multi-frequency, multiple devices may be affected simultaneously, disrupting everything from mobile phone communication to GPS tracking systems.

Jammers have a defined range of effectiveness, and devices outside that range will not be affected. However, within the jammer’s operational range, the interference can be significant, leading to complete communication blackouts or degraded signal quality. This is especially critical in environments where secure or uninterrupted communication is required, such as military zones or sensitive government operations.

Understanding the jammer working principle helps clarify how signal jammers disrupt communication. By transmitting interference signals on the same frequency as the targeted devices, jammers block or degrade signals, preventing devices from functioning as intended. Whether targeting a single frequency or multiple frequencies, jammers can significantly impact communication systems, and their use in various applications underscores the importance of understanding their effects.

How Does GPS Repeater Jammer Work

Types of Jammer Working Principles and Their Specific Working Mechanisms

Understanding the types of jammers and how they operate is essential to grasping the jammer working principle. Different jammers target specific communication networks and technologies, from mobile phone signals to Wi-Fi and GPS systems. The following sections describe the most common types of jammers, their working mechanisms, and their specific applications.

Cell Phone Jammers

Cell phone jammers are designed to block or interfere with mobile networks, preventing phones from making calls, sending texts, or using mobile data. The jammer working principle behind a cell phone jammer involves transmitting signals on the same frequencies as the cellular network, essentially overpowering the network’s communication signals.

• How They Interfere with Mobile Networks (GSM, CDMA, etc.)
  Mobile phones operate on specific frequencies, such as GSM (Global System for Mobile Communications), CDMA (Code Division Multiple Access), and LTE (Long-Term Evolution). Cell phone jammers target these frequencies by broadcasting interference signals that overpower or block the device’s connection to the network. This can cause the phone to lose service, drop calls, or fail to send or receive data. In some cases, the phone may display “no service” or “emergency calls only” statuses.
• GSM and CDMA networks, for example, rely on specific frequency bands to connect users to their network, and a jammer targeting these bands can disrupt all services within the range of the jammer.
• In urban environments, where multiple mobile networks operate, a multi-frequency jammer is used to block various network types simultaneously.
• Impact on Calls, Texts, and Data
  The primary impact of a cell phone jammer is the complete loss of communication for mobile users within the jammer’s range. Calls will drop immediately, and any ongoing texts or data transfers will be interrupted. In environments where communication security is critical, such as government or military settings, cell phone jammers are used to ensure that mobile phones cannot be used for unauthorized communication. This effect extends to mobile internet usage, preventing devices from accessing data services as well.

Wireless Jammers

Wireless jammers, as the name suggests, target all wireless communication systems. They are designed to interfere with a variety of wireless signals, such as Wi-Fi, Bluetooth, GPS, and other unlicensed communication protocols. These jammers work by transmitting signals on the same frequencies that these devices use for communication, resulting in the interruption or blocking of the wireless service.

• Effect on Wi-Fi, Bluetooth, GPS, and Other Wireless Communications
  Wireless jammers are versatile devices capable of disrupting multiple communication channels at once. Common targets include:
• Wi-Fi Jammers: These block Wi-Fi networks by flooding the 2.4 GHz or 5 GHz frequency bands, preventing devices from connecting to the network or causing existing connections to drop.
• Bluetooth Jammers: Bluetooth devices, which operate within the 2.4 GHz frequency, can also be disrupted by wireless jammers, preventing devices like headsets, speakers, and keyboards from maintaining their connections.
• GPS Jammers: GPS jammers prevent GPS receivers from receiving satellite signals, which can interfere with navigation systems or prevent the tracking of vehicles and personnel.

Wireless jammers can be highly effective in preventing unauthorized access to networks, and they are often used in sensitive environments where security is critical, such as in military installations, government buildings, or high-security zones.

Comparison Between Cellular and Wireless Jammers

The table below compares the characteristics of cellular and wireless jammers, outlining their unique features and uses.

The jammer working principle behind cell phone and wireless jammers revolves around the interference of radio signals on the same frequencies used by devices to communicate. Cell phone jammers are specialized to block mobile communication networks, while wireless jammers have a broader scope, targeting various communication technologies like Wi-Fi, Bluetooth, and GPS. The effectiveness and application of each type of jammer depend on the frequency bands they target and their intended use, with more sophisticated jammers designed to disrupt multiple wireless systems simultaneously.

Legality of Jammer Working Principle

The legality of jammers, including their sale, use, and distribution, is a critical aspect to understand, as misuse of these devices can have serious legal implications. The jammer working principle, which revolves around interfering with wireless communication signals, is inherently disruptive to public safety and the efficient functioning of communication networks. Because of these significant disruptions, many countries, including the United States, have stringent laws in place regarding the use of jammers, with severe penalties for illegal activity.

Legal Implications

• Laws Surrounding the Sale and Use of Jammers (e.g., The Communications Act of 1934)
  In the United States, the sale, operation, and distribution of jammers are strictly regulated under the Communications Act of 1934. According to Section 302(b) of this Act, the use of devices that interfere with radio communications is prohibited. This includes devices like cell phone jammers, wireless jammers, and GPS jammers that exploit the jammer working principle to disrupt communication signals.
• The Communications Act of 1934 provides that any device that emits interference signals is illegal to use without authorization from the Federal Communications Commission (FCC).
• Under this law, individuals or businesses caught using, selling, or advertising jamming devices can face hefty fines, equipment seizure, and even imprisonment. The intent behind this legislation is to prevent interference with important public communications, such as emergency services, law enforcement, and air traffic control.
• Risks of Using Jammers for Personal or Commercial Purposes
  While the jammer working principle can be useful in certain controlled environments, such as military operations, unauthorized use of jammers can result in significant risks and consequences.
• Personal Use: Individuals who use jammers in private spaces may inadvertently disrupt essential communication services, such as 911 emergency calls, or interfere with public safety communications. For example, using a cell phone jammer in a public area could prevent nearby phones from receiving emergency calls or hinder the ability of individuals to call for help.
• Commercial Use: For businesses, using jammers to prevent employees or customers from using mobile phones or wireless devices can lead to legal challenges. If the jammer interferes with local wireless networks or mobile service providers, businesses may be held accountable for illegal interference with licensed communication networks.
• The legality of jammers is particularly important in commercial settings such as airports, schools, and hospitals, where devices are often used to control phone usage. However, even in these environments, the risks of using jammers for commercial purposes outweigh any potential benefits. The law typically prohibits businesses from implementing such devices without authorization from the FCC.

FCC’s Role

• The Federal Communications Commission’s Regulations on Jammers
  The Federal Communications Commission (FCC) plays a central role in regulating the use of Jammer Working Principles in the U.S. The FCC enforces the laws set out in the Communications Act of 1934 and ensures that devices that block or disrupt communication signals are either licensed or banned based on their purpose and intended use.
• The FCC’s stance on jammers is clear: they are illegal for general use, and their purpose is restricted to specific sectors, such as law enforcement and the military, under strict supervision.
• The FCC monitors and investigates reports of illegal jamming activities, and individuals or entities found using jammers without proper authorization face severe penalties. For example, the FCC may issue fines for illegal operation or confiscate devices used for jamming if they are determined to be in violation of federal regulations.
• Moreover, the FCC provides guidelines for reporting suspected illegal jamming activities. In many cases, individuals who suspect jamming can file a complaint with the FCC, which may take legal action against those responsible.
• Consequences of Using Illegal Jamming Devices
  The consequences of using illegal jammers extend beyond simple fines.
• Monetary Fines: The FCC has the authority to impose significant fines on individuals or businesses caught using or selling jammers without permission. These fines can range from several thousand dollars to hundreds of thousands, depending on the severity of the violation.
• Seizure of Jamming Devices: In addition to fines, authorities can seize jamming devices if they are being used illegally. The confiscation of devices serves as both a deterrent and a measure to prevent further illegal interference with communication systems.
• Imprisonment: In extreme cases, individuals involved in large-scale illegal jamming operations could face imprisonment. This is particularly true when the use of jammers interferes with critical communications, such as emergency response systems or national security networks.

The legality of jammers is a crucial issue, as misuse of these devices can result in severe consequences for both individuals and businesses. Understanding the jammer working principle, along with the legal implications of using such devices, is essential for anyone considering using or selling jammers. The FCC’s role in regulating these devices ensures that communication systems remain uninterrupted and safe for public and private use. To avoid legal trouble, it is important to seek proper authorization before using jammers, particularly in commercial and personal settings where interference with wireless communication networks could cause significant disruptions.

Jammer Working Principle: How to Detect a Signal Jammer?

Detecting a signal jammer can be a challenging task, as these devices are designed to disrupt wireless communication by emitting interference signals. The jammer working principle involves sending out signals that block or degrade the performance of communication systems such as mobile networks, Wi-Fi, or GPS. Understanding the common signs of jamming and the available detection methods is crucial for identifying and addressing these disruptions.

Common Signs of Jamming

The most noticeable signs of signal jamming include disruptions to communication systems and a failure of devices to connect properly. When a jammer is in operation, it affects the communication signals in the area, and users may experience several symptoms indicating that a jammer is nearby.

• Dropped Calls:
  One of the most common signs of jamming is the sudden dropping of calls. If you are on a call and suddenly lose connection with no apparent reason, it could be the result of a signal jammer. The jammer working principle of overpowering the mobile network’s frequencies can cause communication breakdowns, resulting in dropped calls or a failure to make a call in the first place.
• This is especially evident in areas where mobile phone service is typically stable but suddenly becomes unreliable. If calls are dropped consistently in a specific area without network issues, jamming could be the cause.
• Poor Reception:
  Jamming can cause poor reception on mobile phones, even in areas with strong network signals. If you are experiencing weak signals or unable to make or receive calls, it could indicate the presence of a signal jammer.
• For example, if your phone continually shows “no service” or fluctuates between full bars and no reception, it may be due to interference from a jammer.
• Disrupted Communication:
  Aside from voice calls, signal jamming can also affect other forms of communication, such as text messages and mobile data. You may notice delays in sending or receiving texts, or you may be unable to access the internet altogether. This is another sign that a jammer is actively disrupting communication systems.
• Similarly, Wi-Fi or Bluetooth connections may also experience frequent disconnections or failure to establish a connection, which can be attributed to wireless jamming.

Detection Methods

Detecting a signal jammer requires specialized tools and techniques. While some signs of jamming are visible to the average user, others may not be as apparent and require advanced technology to confirm the presence of interference.

• Specialized Apps and Tools (Limitations)
  Several apps and tools have been developed to help detect signal jammers. These tools work by scanning the wireless environment to identify abnormal interference patterns. Apps can monitor the strength of signals from cellular networks, Wi-Fi, and Bluetooth connections to help detect whether a jammer is affecting the area.
• Cellular Network Scanners: Some apps scan for dropped signals or signal degradation across various frequencies, which may indicate jamming. These apps are particularly useful for detecting mobile network jamming.
• Wi-Fi Signal Detectors: There are tools designed to monitor Wi-Fi channels to detect disruptions caused by jammers. These detectors can identify whether the Wi-Fi signal is being blocked or interfered with.
• GPS Signal Detectors: For jamming affecting GPS systems, specialized GPS detectors can monitor the strength and reliability of satellite signals. Any irregularities or a complete loss of GPS signal could be a result of GPS jamming. While these apps and tools can provide valuable data, they have limitations. For example, many apps require a functioning network or signal to compare disruptions, and some jammers are designed to be more subtle, making them harder to detect. Furthermore, these tools may not always pinpoint the exact location or cause of interference, as jammers can be moved or hidden.
• Importance of Contacting Authorities if Jamming is Suspected
  If you suspect that signal jamming is affecting your communication devices, it is crucial to contact the appropriate authorities. The jammer working principle relies on creating interference over specific frequencies, which could affect many devices in the vicinity. In many cases, jammers are illegal to use without authorization, and their presence can pose a significant risk to public safety and security.
• Law Enforcement: If you believe that a jammer is causing disruptions, especially in sensitive or high-security areas, reporting it to law enforcement is essential. Jammers can interfere with emergency services, so it’s important to ensure that their use is investigated.
• FCC Reporting: In the U.S., the Federal Communications Commission (FCC) plays a key role in regulating jamming devices. If you suspect illegal jamming activities, contacting the FCC is a crucial step in addressing the problem. The FCC has dedicated portals for reporting suspected jammers and can investigate cases of interference.
• Coordination with Service Providers: In some cases, your wireless service provider may be able to help diagnose jamming issues. They can provide support in analyzing network performance and can collaborate with authorities to identify the source of the interference.

Detecting a signal jammer involves recognizing common signs of disruption, such as dropped calls, poor reception, and disrupted communication, and using specialized tools for a more in-depth analysis. While apps and devices can aid in identifying jammers, the jammer working principle makes it difficult to pinpoint their exact location without professional equipment. If jamming is suspected, contacting the relevant authorities such as law enforcement or the FCC is essential to ensure that the issue is addressed legally and efficiently. Recognizing the signs of jamming and knowing the proper steps to take can help prevent further disruption to communication systems.

Jammer Working Principle: How to Stop a Cell Phone Jammer

Dealing with a cell phone jammer can be challenging, as these devices are specifically designed to interfere with mobile network signals, making it difficult to make calls, send texts, or use mobile data. The jammer working principle involves sending interference signals on the same frequencies as those used by mobile networks, effectively blocking or disrupting communication within a certain range. While stopping a cell phone jammer is not always straightforward, there are several approaches you can take to mitigate its effects or eliminate the disruption entirely.

Solutions to Counter Jamming

Physically Locating and Disabling the Jammer

One of the most direct methods of stopping a cell phone Jammer Working Principle is to locate it and physically disable it. Jammers emit radio interference on specific frequencies, and if you can identify their source, you can neutralize the problem.

• Step 1: Identify the Area of Interference
  Jammers usually affect a specific area, causing disruption only within a certain range. To find the source, begin by identifying the location where the signal loss is most severe. This could be an isolated area or a confined space where the jammer may be hidden or in use, such as a building or vehicle.
• You may notice that your phone loses service entirely or fluctuates between full signal and no signal in certain areas, which can give you clues about where the jammer might be located.
• Step 2: Locate the Jammer
  Once you’ve identified the area, attempt to search for the device physically. Jammers are often compact and portable, so they could be concealed in bags, drawers, or behind objects. In some cases, they may be installed as part of a larger security system or be hidden to prevent detection.
• If you have access to specialized equipment, such as a spectrum analyzer, you may be able to pinpoint the jammer more precisely by scanning for abnormal radio frequency signals. These devices can help detect the interference frequencies used by the jammer, guiding you toward its source.
• Step 3: Disable or Turn Off the Jammer
  Once the jammer is located, the most effective solution is to turn it off. Most jammers have simple power switches, but some may be more sophisticated and require additional tools to deactivate. Be sure to check for any additional security measures or safety protocols if the jammer is part of a more complex system.

Changing Phone Frequency or Switching to Another Network

In some cases, switching frequencies or network connections can help mitigate the impact of a cell phone Jammer Working Principle, though this is not always a complete solution.

• Switching Frequencies
  Some jammers target specific frequency bands, such as the GSM, CDMA, or LTE bands. If the jammer is only blocking one frequency band, switching your phone to a different frequency may allow you to regain a connection.
• For example, if your phone is on a 2G or 3G network and the jammer is blocking that band, switching to a 4G or 5G network (if available) may allow you to bypass the interference. However, this will only work if the jammer is not targeting all mobile communication frequencies.
• Switching to Another Network
  If your phone is using a specific carrier’s network and the jammer targets that network, switching to a different network (if you have multiple service providers) may help you regain service. Some mobile phones offer the ability to select between different carriers or network types, allowing users to manually change their network preferences. However, this solution is only effective if the jammer is not blocking multiple networks or technologies simultaneously.

Moving to a Different Location to Escape the Range

If physically disabling the Jammer Working Principle is not possible and changing frequencies or networks doesn’t work, the simplest solution may be to move away from the area affected by the jammer. Since jammers have a limited range, relocating outside of that range may restore your mobile service.

• Relocating to a Different Area
  Jammers generally work within a specific radius, so moving further away from the affected zone may allow your phone to reconnect to the network. This solution is particularly effective in large, open spaces or when the jammer is in use in a confined area like a room, car, or building.
• If you are in a public space, such as a theater or conference room, relocating to a different part of the venue might allow you to find a spot where the signal is not disrupted.
• Seeking Areas with Stronger Coverage
  Moving to a different location with stronger network coverage can also help you bypass the jammer’s interference. For instance, moving closer to a window or an area with better cellular reception may allow you to establish a connection if the jammer is only causing issues in areas with weak signals.

Seeking Help

Reporting to Authorities (FCC, Law Enforcement)

If you are unable to locate the jammer or resolve the issue on your own, the next step is to report the problem to the relevant authorities. Illegal jamming is a violation of federal law, and it is important to ensure that the responsible parties are held accountable.

• Contacting the FCC
  In the United States, the Federal Communications Commission (FCC) is responsible for regulating the use of jammers. The FCC has a dedicated process for reporting suspected jamming activities. If you believe that a jammer is operating illegally and disrupting communication networks, you can file a complaint with the FCC.
• The FCC may investigate the incident, and if the jammer is found to be causing illegal interference, they can take legal action, which may include fines or equipment seizure.
• Law Enforcement Assistance
  In cases where the use of a jammer is disrupting public safety or emergency communications, law enforcement should be contacted immediately. Jamming devices can interfere with 911 calls, emergency communications, or critical operations, and it is vital that they are addressed swiftly.
• Law enforcement agencies may have the tools and expertise to locate and disable jammers, as well as investigate potential criminal activities related to illegal jamming.

Stopping a cell phone jammer involves various strategies, including physically locating and disabling the device, changing phone frequencies, or moving to a different location to escape the jammer’s range. However, if these solutions do not work, it is essential to seek help from the appropriate authorities, such as the FCC or law enforcement. The jammer working principle is designed to interfere with communication systems, but through proper detection and intervention, you can mitigate its impact and restore normal communication.

Pocket WiFi Jammer: How It Works and Blocks Wireless Signals

FAQs about Jammer Working Principle