Dual frequency antennas and associated down-conversion method
First Claim
1. A dual frequency antenna, comprising:
- a plurality of dipole antennas configured to receive signals having first and second frequencies, and being arrayed to an effective length to reradiate signals at a third frequency, the third frequency being the difference between the first and second frequencies; and
a plurality of nonlinear resonant circuits, each nonlinear resonant circuit interconnecting at least two of the plurality of dipole antennas and configured to permit reradiation of signals having the third frequency over the effective length.
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Abstract
A dual frequency antenna includes a plurality of dipole antennas configured to receive first and second frequencies. The antennas are arrayed to an effective length to reradiate at a third frequency, which is down-converted from the first and second frequencies. A plurality of nonlinear resonant circuits interconnect the plurality of dipole antennas and are configured to permit reradiation of the third frequency over the effective length through its low frequency dipole resonance. A method of down-converting at least first and second electromagnetic radiation frequencies is also provided. The method includes transmitting first and second electromagnetic beams at first and second frequencies, respectively. The first and second frequencies are converted to the difference frequency through a nonlinear resonant circuit coupling the at least two dipole antennas.
48 Citations
16 Claims
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1. A dual frequency antenna, comprising:
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a plurality of dipole antennas configured to receive signals having first and second frequencies, and being arrayed to an effective length to reradiate signals at a third frequency, the third frequency being the difference between the first and second frequencies; and a plurality of nonlinear resonant circuits, each nonlinear resonant circuit interconnecting at least two of the plurality of dipole antennas and configured to permit reradiation of signals having the third frequency over the effective length. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method of down-converting at least first and second electromagnetic radiation frequencies:
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transmitting a first electromagnetic beam at a first frequency; transmitting a second electromagnetic beam at a second frequency offset from the first frequency by a difference frequency; receiving the first and second electromagnetic beams with at least two dipole antennas; converting the first and second frequencies to the difference frequency through a nonlinear resonant circuit coupling the at least two dipole antennas; and transmitting an electromagnetic beam at the difference frequency from the coupled at least two dipole antennas. - View Dependent Claims (13, 14, 15, 16)
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Specification