# US 7,609,748 B2 · Method, system and apparatus for maximizing a jammer's time-on-target and power-on-target

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- Number: US 7,609,748 B2
- Document ID: US7609748B2
- Status: Granted
- Kind: B2
- Application number: 11/377,979
- Filed: 2006-03-17
- Published: 2006-07-27
- Granted: 2009-10-27
- Earliest claimed: 2004-08-06
- Assignees: Agilent Technologies, Inc.
- Inventors: Lars Karlsson
- Web page: https://patentgrep.com/patent/US7609748B2

## CPC

- H04K 3/42: {characterized by the control of the jamming frequency or wavelength}
- H04K 3/45: {characterized by including monitoring of the target or target signal, e.g. in reactive jammers or follower jammers for example by means of an alternation of jamming phases and monitoring phases, called "look-through mode"}
- H04K 2203/34: involving multiple cooperating jammers
- H04K: SECRET COMMUNICATION; JAMMING OF COMMUNICATION

## Abstract

A system and method of electronic signal jamming employ a jamming signal transmitter, an electronic signal tuner and a controller. During a first time period, the transmitter transmits a jamming signal in a first frequency segment comprising first frequencies. In a subsequent second time period, the transmitter stops transmitting, while the tuner collects signals in a second frequency segment comprising second frequencies. In a subsequent third time period, the transmitter resumes transmitting the jamming signal in the first frequency segment, while at a same time the controller processes the signals collected by the tuner in the second frequency segment and the tuner tunes to a third frequency segment comprising third frequencies. Then, before any further signals are collected by the tuner, the transmitter transmits the jamming signal in the second frequency segment responsive to the signals collected in the second frequency segment and processed by the controller.

## Claims

### Claim 1

An electronic signal jamming system, comprising:
a jamming signal transmitter;
an electronic signal tuner;
a jamming system controller for processing electronic signals collected by said electronic signal tuner,
wherein during a first time period, the jamming signal transmitter transmits a jamming signal in a first frequency segment comprising first frequencies,
wherein during a second time period subsequent to the first time period, the jamming signal transmitter stops transmitting, while the electronic signal tuner collects signals in a second frequency segment comprising second frequencies different from the first frequencies, and
wherein during a third time period subsequent to the second time period, the jamming signal transmitter resumes transmitting the jamming signal in the first frequency segment, while at a same time the controller processes the signals collected during the second time period in the second frequency segment by the electronic signal tuner, and then, before any further signals are collected by the electronic signal tuner, the jamming signal transmitter transmits the jamming signal in the second frequency segment responsive to the signals collected during the second time period in the second frequency segment by the electronic signal tuner and processed by the controller.

### Claim 2 (depends on 1)

The signal jamming system of claim 1, wherein said electronic signal tuner tunes to a third frequency segment comprising third frequencies different from the second frequencies at the same time that the controller processes the signals collected during the second time period in the second frequency segment by the electronic signal tuner.

### Claim 3

A method of operating an electronic signal jamming system, the method comprising:
during a first time period, transmitting with a jamming signal transmitter a jamming signal in a first frequency segment comprising first frequencies;
during a second time period subsequent to the first time period, collecting with an electronic signal tuner electronic emissions in a second frequency segment comprising second frequencies different from the first frequency; and
during a third time period subsequent to the second time period, transmitting with the jamming signal transmitter said jamming signal in said first frequency segment, while at a same time a controller processes the electronic emissions collected during the second time period in the second frequency segment by the electronic signal tuner, and then, before any further electronic emissions are collected by the electronic signal tuner, transmitting the jamming signal in the second frequency segment responsive to the electronic emissions collected during the second time period in the second frequency segment by the electronic signal tuner and processed by the controllers.

### Claim 4 (depends on 3)

The method of claim 3, further comprising tuning the electronic signal tuner to a third frequency segment comprising third frequencies different from the second frequencies, said tuning being executed during the third time period in parallel with said with the jamming signal transmitter transmitting said jamming signal.

### Claim 5 (depends on 3)

The method of claim 3, wherein said jamming signal transmitter transmits the jamming signal in said second frequency segment virtually immediately upon completion of said controller processing the electronic emissions collected during the second time period in the second frequency segment.

### Claim 6 (depends on 3)

The method of claim 3, wherein said jamming signal transmitter transmitting the jamming signal in said first frequency segment transitions into transmitting the jamming signal in said second frequency segment virtually without pause.