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A composite mobile phone signal jammer and its jamming method

A mobile phone signal and jammer technology, applied in the direction of communication interference, electrical components, etc.

Active Publication Date: 2018-10-16
RUNJIAN COMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Another object of the present invention is to provide a composite mobile phone signal jammer, which alternately transmits two different signals generated by the suppressing jamming circuit and the sweeping jamming circuit, and jointly interferes with the communication frequency band, thereby overcoming the general signal interference. The jammer uses a single frequency sweep to interfere with the problem of interference blind spots, which ensures a good interference effect; at the same time, the jammer of the present invention only interferes with the downlink frequency and does not interfere with the uplink frequency, and has little impact on the communication base station

Method used

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  • A composite mobile phone signal jammer and its jamming method
  • A composite mobile phone signal jammer and its jamming method
  • A composite mobile phone signal jammer and its jamming method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] Frequency band 1: 869MHz~894MHz; (CDMA800, downlink signal)

[0057] Generation and transmission of the first interference signal: the white noise generated by the noise signal generator is filtered by the first bandpass filter (165-190MHz can be selected), and then amplified by the first radio frequency power amplifier and combined with the local oscillator unit Perform up-conversion (the local oscillator unit can choose to generate a local oscillator signal of 704MHz), the minimum output frequency after up-conversion is 165+704=869MHz, and the maximum frequency is 190+704=894MHz; and then filtered by the second band-pass filter The clutter after mixing is strobed by the RF switch, and then radiated out through the transmitting antenna after passing through the second RF power amplifier; this way is to directly mix the generated noise signal to the corresponding interference frequency band, which is called suppression interference Signal.

[0058] Generation and emiss...

Embodiment 2

[0060] Frequency band 2: 935MHz~960MHz; (GSM900, downlink signal)

[0061] Generation and transmission of the first interference signal: the white noise generated by the noise signal generator is filtered by the first bandpass filter (165-190MHz can be selected), and then amplified by the first radio frequency power amplifier and combined with the local oscillator unit Perform up-conversion (the local oscillator unit can choose to generate a local oscillator signal of 770MHz), the minimum output frequency after up-conversion is 165+770=935MHz, and the maximum frequency is 190+770=960MHz; and then filtered by the second band-pass filter The clutter after mixing is strobed by the RF switch, and then radiated out through the transmitting antenna after passing through the second RF power amplifier; this way is to directly mix the generated noise signal to the corresponding interference frequency band, which is called suppression interference Signal.

[0062] Generation and emissi...

Embodiment 3

[0064] Frequency band 3: 1805MHz~1880MHz; (DCS1800, downlink signal)

[0065] Generation and transmission of the first interference signal: the white noise generated by the noise signal generator is filtered by the first bandpass filter (1005~1080MHz can be selected), and then amplified by the first radio frequency power amplifier and combined with the local oscillator unit Perform up-conversion (local oscillator unit can choose to generate 800MHz local oscillator signal), the minimum output frequency after up-conversion is 1005+800=1805MHz, and the maximum frequency is 1080+800=1880MHz; and then filtered by the second band-pass filter The clutter after mixing is strobed by the RF switch, and then radiated out through the transmitting antenna after passing through the second RF power amplifier; this way is to directly mix the generated noise signal to the corresponding interference frequency band, which is called suppression interference Signal.

[0066] Generation and transm...

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Abstract

The invention discloses a composite-type mobile phone signal interference device and an interference method thereof. The composite-type mobile phone signal interference device comprises a suppressed interference circuit, a sweep frequency-type interference circuit, and a radio frequency switch, wherein the suppressed interference circuit generates a suppressed interference signal interfering a mobile phone signal; the sweep frequency-type interference circuit generates a sweep frequency signal interfering the mobile phone signal and is in parallel connection with the suppressed interference circuit; and one of two input ends of the radio frequency switch is selected to be connected with the output end, the two input ends are electrically connected with the suppressed interference circuit and the sweep frequency-type interference circuit respectively, the radio frequency switch frequently and quickly switches the suppressed interference circuit and the sweep frequency-type interference circuit to select one for output, the output end is electrically connected with a transmitting antenna to alternatively output a suppressed interference single and a sweep frequency signal and the signals are transmitted to three-dimensional space. Through alternatively transmitting the two different kinds of signals for altogether interfering a communication frequency band, the problem of an interference blind point is overcome, and good interference effects are ensured.

Description

technical field [0001] The invention relates to the field of mobile phone signal jammers, more specifically, the invention relates to a composite mobile phone signal jammer and a jamming method thereof. Background technique [0002] In recent years, whether it is using mobile phones to cheat in exams or using the ringing circuit principle of mobile phones to make mobile phone remote-controlled bombs to carry out terrorist activities, it has become increasingly rampant. We must find better and more effective ways to deal with it as soon as possible. Mobile phone signal jamming technology can be applied in the following occasions: (1) to prevent mobile phone cheating in various examinations; (2) to prevent terrorism, mainly to deal with mobile phone remote bombs; (3) in some occasions that have strict control requirements for mobile phones, such as some military Administrative areas, gas stations, conference centers, important buildings, etc. [0003] At present, the research...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04K3/00
CPCH04K3/20H04K3/228H04K3/42H04K3/80H04K2203/00
Inventor 覃团发董鹏琳胡永乐沈湘平陈俊江
Owner RUNJIAN COMM
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