10-05-2012, 01:08 PM
RF Jamming System
[attachment=21761]
Objectives:
Working with Professor Bernhard and the engineers at Northrop Grumman (Daniel Blase and Jim Jensen), we have taken on the project of creating a wireless device that will distort communication between another remote device and the object it is controlling. This type of technology is essential in the new age of wireless weaponry and is currently used as a defense mechanism mainly against remote triggers for explosives and also jamming communication lines. We are very excited to have an opportunity to work with Northrop Grumman and also excited to research the type of equipment that is used in defense of this country.
The system would need to cover a large area in real world situations to ensure that the radius of the signal would be sufficient in protecting the given region. In our case, we will be amplifying the signal of the base model of a remote controlled car in order to be certain that we will have greater range as well as signal strength to gain control of the vehicle. This will show, on a smaller-scaled model, the value of having this type of technology on our side by taking away control of a device from a foreign threat.
We are planning to build on top of a radio transmitter circuit using an RF amplifier, larger power source, and possibly antenna design and program in the specific waveforms and noise distortion to create the jamming effect. Our project will provide an effective means of RF jamming as well as a method to communicate above the jamming noise distortion to take command of the device.
Benefits:
• Stop threatening devices in a high-risk area performing their specific function
• Take away the risk of death by being able to disengage weapons from a distance
• Control the device to perform the functions you desire above the noise level
• Stop any given remote apparatus at a given frequency range
Features:
• RF amplification to create a stronger signal and range
• Comply with all FCC regulations by not distorting other important frequencies
• Transmitting high powered signals at 49MHz
• Transmitting a high enough level of noise at 49 MHz to distort signals from the original transmitter
Block Descriptions
Source Controller: This is the transmitter which we want to jam. The star-shaped thing is an antenna.
Transmitter: This is a copy of the controller that came with the car. It outputs modulated control signals that the car interprets as commands. The matching network in the controller is designed for an antenna and may need to be modified to drive wired components.
Noise Generator: This generates a signal that will disrupt the signal sent from the source controller. This disruptive signal is termed ‘noise’. The noise generator will consist of a 49 MHz carrier modulated by some means to create the noise signal.
A1: This is a preamplifier used to ensure the signal from the transmitter is much stronger than the noise source. Otherwise, the transmitter will not be able to control the car!
Summer: This adds the signal from the transmitter to the noise needed to jam the source controller and sends it to the power amplifier.
A2: This is a power amplifier to boost the summed transmitter and noise signal up to the necessary level. A purchased power amplifier, which can be used by future groups, will be best suited to this task.
Matching Network: This is a passive network needed to match the output impedance of the amplifier to the input impedance of the antenna at a specific frequency. Matching networks are fundamental to RF circuits and our group should be able to design one as part of an educational exercise.
Antenna: Transmits or receives radio signals without wires in an efficient manner.
Car: This is the vehicle which we want to take control of. The star-shaped thing is an antenna.
Performance Requirements
• The source controller is able to control the car up to a distance of 45 feet. Therefore, our circuit needs to be able to send a noise and control signal to a distance of at least 45 feet.
• The jammer should use the minimum amount of transmission power necessary to jam the source signal and send out a new control signal. Using more power will increase cost and may interfere undesirably with other systems.
[attachment=21761]
Objectives:
Working with Professor Bernhard and the engineers at Northrop Grumman (Daniel Blase and Jim Jensen), we have taken on the project of creating a wireless device that will distort communication between another remote device and the object it is controlling. This type of technology is essential in the new age of wireless weaponry and is currently used as a defense mechanism mainly against remote triggers for explosives and also jamming communication lines. We are very excited to have an opportunity to work with Northrop Grumman and also excited to research the type of equipment that is used in defense of this country.
The system would need to cover a large area in real world situations to ensure that the radius of the signal would be sufficient in protecting the given region. In our case, we will be amplifying the signal of the base model of a remote controlled car in order to be certain that we will have greater range as well as signal strength to gain control of the vehicle. This will show, on a smaller-scaled model, the value of having this type of technology on our side by taking away control of a device from a foreign threat.
We are planning to build on top of a radio transmitter circuit using an RF amplifier, larger power source, and possibly antenna design and program in the specific waveforms and noise distortion to create the jamming effect. Our project will provide an effective means of RF jamming as well as a method to communicate above the jamming noise distortion to take command of the device.
Benefits:
• Stop threatening devices in a high-risk area performing their specific function
• Take away the risk of death by being able to disengage weapons from a distance
• Control the device to perform the functions you desire above the noise level
• Stop any given remote apparatus at a given frequency range
Features:
• RF amplification to create a stronger signal and range
• Comply with all FCC regulations by not distorting other important frequencies
• Transmitting high powered signals at 49MHz
• Transmitting a high enough level of noise at 49 MHz to distort signals from the original transmitter
Block Descriptions
Source Controller: This is the transmitter which we want to jam. The star-shaped thing is an antenna.
Transmitter: This is a copy of the controller that came with the car. It outputs modulated control signals that the car interprets as commands. The matching network in the controller is designed for an antenna and may need to be modified to drive wired components.
Noise Generator: This generates a signal that will disrupt the signal sent from the source controller. This disruptive signal is termed ‘noise’. The noise generator will consist of a 49 MHz carrier modulated by some means to create the noise signal.
A1: This is a preamplifier used to ensure the signal from the transmitter is much stronger than the noise source. Otherwise, the transmitter will not be able to control the car!
Summer: This adds the signal from the transmitter to the noise needed to jam the source controller and sends it to the power amplifier.
A2: This is a power amplifier to boost the summed transmitter and noise signal up to the necessary level. A purchased power amplifier, which can be used by future groups, will be best suited to this task.
Matching Network: This is a passive network needed to match the output impedance of the amplifier to the input impedance of the antenna at a specific frequency. Matching networks are fundamental to RF circuits and our group should be able to design one as part of an educational exercise.
Antenna: Transmits or receives radio signals without wires in an efficient manner.
Car: This is the vehicle which we want to take control of. The star-shaped thing is an antenna.
Performance Requirements
• The source controller is able to control the car up to a distance of 45 feet. Therefore, our circuit needs to be able to send a noise and control signal to a distance of at least 45 feet.
• The jammer should use the minimum amount of transmission power necessary to jam the source signal and send out a new control signal. Using more power will increase cost and may interfere undesirably with other systems.