Sweeping mode of jamming system
AssigneeKaonetics Technologies, Inc.
InventorJames Cornwell
Life of this patent
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Abstract
A system includes a generator and at least one device. The generator includes a waveform oscillator and a blanking pulse generator. Each device includes a transmit antenna, a receive antenna, an antenna unit, a mixer and a detector. The antenna unit includes a receiver coupled to the receive antenna, an amplifier coupled to the receiver and a transmitter coupled to the transmit antenna and the blanking pulse generator. The mixer has inputs coupled to the amplifier and the waveform oscillator. The detector is coupled to the mixer.
Claims34
1-3. (canceled)
A system for jamming radio frequency communications comprising:
- a radio frequency generator for producing a radio frequency signal;
- at least two transmit antennas for transmitting a radio frequency signal;
- an antenna unit having at least two amplifiers, each amplifier having an input and an output, and at least two transmitters, each transmitter having an input and an output, the output of each respective amplifier coupled to the input of each respective transmitter and the output of each respective transmitter coupled to its respective transmit antenna;
- and
- a programmable feed device coupled between the radio frequency generator and amplifier of the antenna unit,
- wherein, the radio frequency generator provides the radio frequency signal modulated upon a sweeping radio frequency carrier signal.
The system according to claim 1, wherein control signals and the radio frequency signals are supplied to the programmable feed device, including a signal to control phase shifting of the radio frequency signal, a signal to control attenuation of the radio frequency signal and the radio frequency signal from the radio frequency generator.
The system according to claim 1, wherein the antenna unit includes a programmable balun coupled to receive the radio frequency signal from the programmable feed device, the programmable balun functioning to split the radio frequency signal from the programmable feed device into at least two phase diverse signals to drive respective amplifiers.
The system according to claim 3, wherein two separately controllable attenuation control signals are split by programmable balun so that separate and controllable attenuation signals are coupled to respective first and second amplifiers.
The system according to any claim 1, wherein the frequency transmitted from at least one of the transmit antennas sweeps from a first low frequency not less than about 3 MHz to a second higher frequency not greater than about 3 GHz.
The system according to claim 1, wherein the frequency transmitted from at least one of the transmit antennas sweeps forward from a first low frequency to a second higher frequency and then sweeps back from the second higher frequency to the first lower frequency.
The system according to claim 1, wherein the radio frequency generator provides a randomly varying signal to control at least one of phase shifting and attenuation of the radio frequency signal.
The system according to claim 1, wherein the radio frequency generator is processor controlled wherein a memory stores the modes of operation of the radio frequency generator in the form of a threat table that specifies the parameters to be generated by the radio frequency generator.
The system according to claim 1, wherein the radio frequency generator 1 produces a radio frequency signal characterized by a center frequency and a band width greater than 20% of the center frequency.
The system according to claim 1, wherein the output of the radio frequency generator includes a randomly chopped binary output wave form that is used as a chopping signal to modulate the signal.
The system according to claim 1, further comprising programmable memory, wherein the memory stores attenuation and phase shifting properties to be provided to each programmable feed device.
The system according to claim 1, further including a plurality of driven devices, each driven device having the at least two transmit antennas, the at least two amplifiers, and the at least two transmitters, wherein the plurality of driven devices are coupled to the programmable feed device.
The system according to claim 1, wherein the radio frequency generator has a band specific modulator, the band specific modulator including a waveform generator coupled to a voltage controlled oscillator.
The system according to claim 1, wherein the frequency transmitted from at least one of the transmit antennas sweeps from a first low frequency to a second higher frequency and then sweeps back from the second higher frequency to the first lower frequency, wherein desired frequency bands between the first low frequency and the second higher frequency are scanned at a different rate than other frequency bands between the first low frequency and the second higher frequency.
The system according to claim 1, further comprising a receive antenna for receiving a radio frequency, and a receiver coupled to the receive antenna, wherein the receive antenna is coupled to the amplifier, and the receive antenna, the transmit antenna, the receiver, the transmitter and the amplifier are configured to form an oscillator.
The system according to claim 1, mounted on a movable vehicle.
The system according to claim 1, further comprising:
- a signal mixer having inputs and an output, the output of the amplifier coupled to one of the inputs of the signal mixer and the output of the radio frequency generator physically coupled to another input of the signal mixer, and the output of the radio frequency generator coupled to one of the inputs of the amplifier;
- a detector coupled to the output of the signal mixer for detecting a potential radio frequency threat signal;
- and
- a blanking pulse generator coupled to the transmitter for temporarily silencing or blanking the transmitter so that the transmitter does not output a signal to the transmit antenna.
The system according to claim 1, further including a local oscillator and two additional mixers coupled to the local oscillator, wherein the frequency modulated signal provided by the radio frequency generator is supplied to the input of the first additional mixer and the signal from the local oscillator is supplied to the second input of the first additional mixer;
- the output of the first additional mixer is supplied to the input of the signal mixer which also receives the signal from the receive antenna;
- the output of the signal mixer is provided to the input of the second additional mixer and the output from the local oscillator is also supplied to the input of the second additional mixer, wherein the output of the second mixer is supplied to the detector.
The system according to claim 1, further comprising at least three grounding planes for at least one of the transmit antennas, the grounding planes comprising conductive plates electrically isolated from the at least one of the transmit antennas, wherein the at least one of the transmit antennas is planar in shape and includes a first insulating substrate extending in the plane of the at least one transmit antenna and a radiating element, and the at least one transmit antenna is oriented to transmit electromagnetic radiation which is circularly polarized.
Dependencies are inferred from the claim text.