Claims
- 1. A method of creating an electromagnetic interference field at a distance, comprising:
transmitting a first electromagnetic beam at a first frequency and in a first direction; and transmitting a second electromagnetic beam at a second frequency and in a second direction, wherein the second frequency is offset from the first frequency to define an interference difference frequency, and the first and second electromagnetic beams interfere at a far field distance corresponding to an intersection of the first and second electromagnetic beams.
- 2. The method according to claim 1, further comprising collimating the first and second electromagnetic beams.
- 3. The method according to claim 2, wherein the step of collimating the first and second electromagnetic beams comprises collimating the first electromagnetic beam in a first direction and collimating the second electromagnetic beam in the second direction.
- 4. The method according to claim 2, further comprising combining the first and second beam in a third direction, and wherein the step of collimating the first and second electromagnetic beam comprises collimating the first and second beams in the third direction.
- 5. The method according to claim 1, further comprising combining the first and second electromagnetic beams.
- 6. The method according to claim 5, wherein the step of combining the first and second electromagnetic beams comprises combining linearly polarized first and second beams through a polarization beam combiner.
- 7. The method according to claim 5, wherein the step of combining the first and second electromagnetic beams comprises combining circularly polarized first and second beams through a circular polarization beam combiner.
- 8. A method of creating an electromagnetic interference field at a distance, comprising:
transmitting at least two electromagnetic beams separated by at least one interference difference frequency; and collimating the at least two electromagnetic beams such that the collimated at least two electromagnetic beams interfere at a far field distance.
- 9. The method according to claim 8, further comprising combining the at least two electromagnetic beams.
- 10. An apparatus for creating an electromagnetic interference field at a distance, comprising:
a first transmitter configured to transmit a first electromagnetic beam at a first frequency and in a first direction; and a second transmitter configured to transmit a second electromagnetic beam at a second frequency and in a second direction, wherein the second frequency is offset from the first frequency to define an interference difference frequency, and the first and second transmitters are configured such that the first and second beams interfere at a far field distance corresponding to an intersection of the first and second directions.
- 11. The apparatus according to claim 10, further comprising a beam combiner for combining the first and second electromagnetic beams.
- 12. The apparatus according to claim 11, further comprising a collimator for collimating the combined first and second electromagnetic beams in a third direction.
- 13. The apparatus according to claim 10, further comprising a first collimator for collimating the first electromagnetic beam in the first direction, and a second collimator for collimating the second electromagnetic beam in the second direction.
- 14. The apparatus according to claim 10, wherein the first transmitter comprises:
a frequency generator configured to generate a signal at a predetermined frequency; and an antenna in communication with the frequency generator for radiating the first electromagnetic beam in the first direction.
- 15. The apparatus according to claim 14, wherein the antenna comprises a collimating antenna.
- 16. The apparatus according to claim 15, wherein the frequency generator comprises a microwave synthesizer.
- 17. The apparatus according to claim 15, wherein the first transmitter further comprises:
a frequency multiplier in communication with the frequency generator for multiplying the predetermined frequency to the first frequency; and a power amplifier in communication with the frequency multiplier for increasing the power output of the antenna.
- 18. An apparatus for creating electromagnetic interference, comprising
a frequency reference for providing a reference signal; first and second collimating transmitters, each transmitter comprising,
a frequency generator, in communication with the frequency reference, and configured to generate a signal at a predetermined frequency based upon the frequency reference; a collimating antenna, in communication with the frequency generator, for transmitting and collimating an electromagnetic beam in a direction and at the predetermined frequency, wherein the first transmitter provides a first a collimated beam at a first predetermined frequency and in a first direction, the second transmitter provides a second collimated beam at a second predetermined frequency and in a second direction, and the second frequency is offset from the first frequency to define an interference difference frequency, and the first and second transmitters are configured such that the first and second collimated beams interfere at a far field distance corresponding to an intersection of the first and second directions.
- 19. An apparatus for creating electromagnetic interference, comprising
a frequency reference for providing a reference signal; a first transmitter and a second transmitters, each transmitter for transmitting electromagnetic beams having frequencies separated by an interference difference frequency, each transmitter comprising:
a wave form synthesizer, in communication with the frequency reference, and configured to generate a signal at a predetermined frequency based upon the frequency reference; and an antenna, in communication with the synthesizer, for transmitting an electromagnetic beam in a direction; a beam combiner for combining the electromagnetic beams; and a collimator for collimating the combined electromagnetic beams in a direction.
CROSS-REFERENCE TO RELATED APPLICATIONS
[0001] This application claims the benefit of U.S. Provisional Application No. 60/387,501, filed May 31, 2002, which is hereby incorporated by reference.
Provisional Applications (1)
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Number |
Date |
Country |
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60385290 |
May 2002 |
US |