US4103236A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic jamming system
Assignee: Siemens AG
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Filing: 1961-09-18
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Granted: 1978-07-25
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Expires: 1981-09-18
Abstract
Abstract 1. A method of jamming wireless communications having a frequency falling within a predetermined frequency band, by means of a powerful jamming transmission, comprising the steps of separating out from the predetermined frequency band, by an electrical filtering operation, a suspect transmission signal falling therein, producing an interference signal band having a band width sufficient to include all filtered frequencies, separating out, by an electrical filtering operation, a signal having a frequency corresponding to the frequency of the previously filtered suspect signal, from said interference signal band, and utilizing said last filtered signal at the interference frequency in the wireless transmission of a jamming signal, the frequency of which corresponds to the frequency of the suspect transmission signal so detected.
Inventors
- 👤 Peter Deserno
- 👤 Hans Prost
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:49
CPC Classifications
H; H04; H04K; H04K3/00; H04K3/40; H04K3/45; H04K3/42
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
119 words
A method of jamming wireless communications having a frequency falling within a predetermined frequency band, by means of a powerful jamming transmission, comprising the steps of separating out from the predetermined frequency band, by an electrical filtering operation, a suspect transmission signal falling therein, producing an interference signal band having a band width sufficient to include all filtered frequencies, separating out, by an electrical filtering operation, a signal having a frequency corresponding to the frequency of the previously filtered suspect signal, from said interference signal band, and utilizing said last filtered signal at the interference frequency in the wireless transmission of a jamming signal, the frequency of which corresponds to the frequency of the suspect transmission signal so detected.
Claim 2
Independent Claim
119 words
A method of jamming wireless communications having a frequency falling within a predetermined frequency band, by means of a powerful jamming transmission, comprising the steps of separating out from the predetermined frequency band, by an electrical filtering operation, a suspect transmission signal falling therein, producing an interference signal band having a band width sufficient to include all filtered frequencies, separating out, by an electrical filtering operation, a signal having a frequency corresponding to the frequency of the previously filtered suspect signal, from said interference signal band, and utilizing said last filtered signal at the interference frequency in the wireless transmission of a jamming signal, the frequency of which corresponds to the frequency of the suspect transmission signal so detected.
Claim 3
Dependent Claim
108 words
A method of jamming wireless communications as defined in claim 1, wherein said suspect transmission signal is converted to a signal of an intermediate frequency falling within a predetermined intermediate frequency band, filtering from said intermediate frequency band a signal corresponding to the intermediate frequency representing the suspect signal, producing said interference signal with a band width corresponding to that of said intermediate frequency band, filtering from said interference signal a signal having the frequency corresponding to the intermediate frequency of the suspect signal, and converting said filtered signal having such interference frequency to the frequency of said suspect signal to form the jamming signal to be transmitted.
Claim 4
Dependent Claim
57 words
A method of jamming wireless communications as defined in claim 1, comprising the steps of simultaneously respectively filtering from the predetermined frequency band, all suspect transmission signals, simultaneously respectively filtering from said interference signal all signals having frequencies corresponding to the previously filtered suspect signals, and simultaneously transmitting a jamming signal for each detected suspect transmission signal.
Claim 5
Dependent Claim
117 words
A method of jamming wireless communications as defined in claim 1, wherein all suspect transmission signals, falling within said predetermined frequency band, are converted to respective signals having intermediate frequencies falling within a predetermined intermediate frequency band, filtering from said intermediate frequency band all signals having intermediate frequencies representing respective suspect signals, producing said interference signal with a band width corresponding to that of said intermediate frequency band, respectively filtering from said interference signal all signals having frequencies corresponding to the intermediate frequencies of the respective suspect signals, and respectively converting said filtered signals having interference frequencies to signals having the respective frequencies of the corresponding suspect signals to form the respective jamming signals to be transmitted.
Claim 6
Independent Claim
114 words
A method of jamming wireless communications, operating on frequencies falling within a predetermined frequency band, by means of a powerful jamming transmission, comprising the steps of alternatively detecting suspect transmissions over a predetermined wave range and radiating jamming signals upon a wave length of any suspect transmission so detected, simultaneously testing during a detection period said frequency band in a multitude of mutually bordering narrow frequency channels so as to ascertain suspect transmission therein, marking each channel upon determining a transmission therein, and passing over each so marked channel a signal having an interference frequency spectrum, forming from each of the latter a corresponding jamming signal and simultaneously transmitting all jamming signals so formed.
Claim 7
Independent Claim
114 words
A method of jamming wireless communications, operating on frequencies falling within a predetermined frequency band, by means of a powerful jamming transmission, comprising the steps of alternatively detecting suspect transmissions over a predetermined wave range and radiating jamming signals upon a wave length of any suspect transmission so detected, simultaneously testing during a detection period said frequency band in a multitude of mutually bordering narrow frequency channels so as to ascertain suspect transmission therein, marking each channel upon determining a transmission therein, and passing over each so marked channel a signal having an interference frequency spectrum, forming from each of the latter a corresponding jamming signal and simultaneously transmitting all jamming signals so formed.
Claim 8
Independent Claim
126 words
A system for jamming wireless communications within a predetermined wave band, with the aid of a powerful jamming transmitter, employing detection periods followed by jamming periods, means for controlling the duration of the respective periods, means for automatically selecting a respective frequency representative of the transmitted frequency of each suspect transmitter ascertained during the detection period, means for producing a signal comprising an interference frequency spectrum having a band width corresponding to said predetermined wave band, means cooperable with said selection means for obtaining from said interference frequency spectrum the respective frequencies thereof corresponding to each selected frequency, and means utilizing each respective interference frequency for forming and transmitting during the following jamming period a corresponding jamming signal having the frequency of the corresponding suspect transmitter.
Claim 9
Independent Claim
126 words
A system for jamming wireless communications within a predetermined wave band, with the aid of a powerful jamming transmitter, employing detection periods followed by jamming periods, means for controlling the duration of the respective periods, means for automatically selecting a respective frequency representative of the transmitted frequency of each suspect transmitter ascertained during the detection period, means for producing a signal comprising an interference frequency spectrum having a band width corresponding to said predetermined wave band, means cooperable with said selection means for obtaining from said interference frequency spectrum the respective frequencies thereof corresponding to each selected frequency, and means utilizing each respective interference frequency for forming and transmitting during the following jamming period a corresponding jamming signal having the frequency of the corresponding suspect transmitter.
Claim 10
Dependent Claim
41 words
In a system according to claim 22, wherein said selection means includes a series of mutually bordering frequency measuring channels for effecting during the detection period a frequency analysis of the ascertained received frequency, said channels covering said predetermined wave band.
Claim 11
Dependent Claim
19 words
In a system according to claim 7, wherein said frequency measuring channels comprise a corresponding number of channel filters.
Claim 12
Dependent Claim
37 words
In a system according to claim 8, wherein said system is provided, at the transmitting side, with a series of transmitter channels and transmitter filters corresponding in number to the frequency measuring channels and frequency measuring filters.
Claim 13
Dependent Claim
46 words
A system according to claim 9, wherein a series of common channels and channel filters are employed for the frequency measurement and the transmitting, respectively, and means for switching said common channels and filters from the detection operation to the jamming transmission operation and vice versa.
Claim 14
Dependent Claim
40 words
A system according to claim 10, comprising means for effecting at least one conversion of the received frequency into a lower frequency position prior to frequency analysis thereof, and effecting reconversion to the original frequency position at the transmitter side.
Claim 15
Dependent Claim
42 words
A system according to claim 11, comprising suitable switch means for designating the received frequencies, and circuit means for operatively actuating said switch means over the involved frequency measuring channels and channel filters by the received frequencies ascertained in the detection periods.
Claim 16
Dependent Claim
43 words
A system according to claim 12, comprising a noise generator for producing the jamming frequency spectrum, and means for connecting said generator in an intermediate frequency position to the transmitter over the transmitter channels and transmitter filters corresponding to the ascertained received frequencies.
Claim 17
Dependent Claim
14 words
A system according to claim 13, comprising switching means for blocking given jamming channels.
Claim 18
Dependent Claim
35 words
A system according to claim 7, comprising means for automatically regulating the amplification of the jamming transmitting means so as to maintain in the presence of fluctuating numbers of jamming channels a maximum output power.
Claim 19
Dependent Claim
34 words
A system according to claim 15, wherein the formation of harmonic waves, in channels which are to be held free for communication, is prevented by means including linear amplifier means and feedback coupling, respectively.
References Cited (Backward Citations)
US2653222A
Cited
US2985754A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-07-24 | 1982-01-23 | 1982-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-07-24 | 1986-01-23 | 1986-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-07-24 | 1990-01-23 | 1990-07-25 | $7700.00 | Window Closed / Lapsed |