High frequency rectenna
First Claim
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1. A rectifying antenna for rectifying electromagnetic radiation with a wavelength shorter than 3.0 centimeters, comprising:
- an antenna having a first half and a second half; and
a first field emission diode for rectifying a current flow, wherein the first field emission diode has a first anode and first cathode electrically connected between the first half of the antenna and the second half of the antenna, and wherein the first cathode is separated from the first anode by a distance of less than 10 microns and wherein the antenna has a length which is approximately equal to half of the wavelength of the electromagnetic radiation to be rectified.
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Abstract
The invention provides an inexpensive array of rectifying antennas which employ field emission diodes for rectifying electromagnetic waves of microwave frequencies and higher frequencies.
60 Citations
15 Claims
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1. A rectifying antenna for rectifying electromagnetic radiation with a wavelength shorter than 3.0 centimeters, comprising:
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an antenna having a first half and a second half; and a first field emission diode for rectifying a current flow, wherein the first field emission diode has a first anode and first cathode electrically connected between the first half of the antenna and the second half of the antenna, and wherein the first cathode is separated from the first anode by a distance of less than 10 microns and wherein the antenna has a length which is approximately equal to half of the wavelength of the electromagnetic radiation to be rectified. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A rectifying antenna for rectifying electromagnetic radiation with a wavelength shorter than 3.0 centimeters, comprising:
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a substrate comprising a layer of insulating material; a first cathode; a first anode; a first conductive strip on the substrate, with a length in a first direction, wherein the first conductive strip is integrally and electrically connected to the first cathode; a second conductive strip on the substrate, with a length in the first direction, wherein the second conductive strip is integrally and electrically connected to the first anode, and wherein the second conductive strip is located along the first direction with respect to the first conductive strip, and wherein the length of the first conductive strip in the first direction is less than half of the wavelength and wherein the length of the second conductive strip in the first direction is less than half of the wavelength, and wherein the length of the first conductive strip in the first direction summed with the length of the second conductive strip in the first direction make a sum which is approximately equal to half of the wavelength; a first load terminal electrically connected to the first conducting strip; and a second load terminal electrically connected to the second conducting strip, wherein the first cathode is located on the part of the first conductive strip closest to the second conductive strip, and wherein the first anode is located on the part of the second conductive strip closest to the first cathode, and wherein the first anode and the first cathode are separated by a distance less than 10 microns forming a first field emission diode. - View Dependent Claims (10, 11)
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12. A rectifying antenna for rectifying electromagnetic radiation with a wavelength shorter than 3.0 centimeters, comprising:
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a substrate comprising a layer of insulating material with a first surface; a first conductive strip on a first surface of the substrate with a length in a first direction wherein a pointed edge of the first conductive strip forms a cathode of a linear field emission diode; and a second conductive strip on the first surface of the substrate with a length in the first direction wherein the second conductive strip forms an anode of a linear field emission diode, and wherein the second conductive strip is located along the first direction with respect to the first conductive strip, and wherein the length of the first conductive strip in the first direction is less than half the wavelength, and wherein the length of the second conductive strip in the first direction is less than half the wavelength and wherein the length of the first conductive strip in the first direction summed with the length of the second conductive strip in the first direction make a total length which is approximately equal to half of the wavelength. - View Dependent Claims (13, 14, 15)
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Specification