Conformal log-periodic antenna assembly
First Claim
1. A conformal log-periodic antenna assembly having a broadband frequency response, the antenna assembly comprising:
- a) a printed wiring board having front and back sides;
b) a plurality of non-overlaping log-periodic antennas etched upon at least one side of the printed wiring board, each log-periodic antenna separated by a spacing extending generally radially from a common point, each log-periodic antenna comprising a plurality of antenna elements extending from a common trunk, the trunk of each log-periodic antenna extending generally radially from the common point;
c) a foam spacer having front and back sides disposed at the back side of the printed wiring board;
d) a dielectric layer having front and back sides disposed at the back of the foam spacer;
e) an absorber layer having front and back sides disposed at the back of the dielectric layer;
f) a metal backing disposed at the back side of the absorber layer for reflecting lower frequency electromagnetic radiation back to the antennas so as to enhance an intensity thereof;
g) wherein the dielectric layer enhances response across a broadband and the foam spacer positions the antennas a desired distance from the metal backing.
2 Assignments
0 Petitions
Accused Products
Abstract
A conformal log-periodic antenna assembly having a broadband frequency response as a printed circuit board having a plurality of log-periodic antennas etched thereupon. Each log-periodic antenna has a plurality of antenna elements extending from a common trunk. The trunk of each log-periodic antenna extends generally radially from a common point. A foam spacer is disposed at the backside of the printed wiring board. A dielectric layer is disposed at the backside of the foam spacer. An absorber layer is disposed at the backside of the dielectric layer. A metal backing is disposed at the backside of the absorber layer for reflecting lower frequency electromagnetic radiation back to the antenna so as to enhance an intensity thereof. The dielectric layer enhances response across a broad frequency band and the foam spacer positions the antennas a desired distance from the metal backing such that reflections therefrom enhance operation of the antennas.
63 Citations
29 Claims
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1. A conformal log-periodic antenna assembly having a broadband frequency response, the antenna assembly comprising:
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a) a printed wiring board having front and back sides; b) a plurality of non-overlaping log-periodic antennas etched upon at least one side of the printed wiring board, each log-periodic antenna separated by a spacing extending generally radially from a common point, each log-periodic antenna comprising a plurality of antenna elements extending from a common trunk, the trunk of each log-periodic antenna extending generally radially from the common point; c) a foam spacer having front and back sides disposed at the back side of the printed wiring board; d) a dielectric layer having front and back sides disposed at the back of the foam spacer; e) an absorber layer having front and back sides disposed at the back of the dielectric layer; f) a metal backing disposed at the back side of the absorber layer for reflecting lower frequency electromagnetic radiation back to the antennas so as to enhance an intensity thereof; g) wherein the dielectric layer enhances response across a broadband and the foam spacer positions the antennas a desired distance from the metal backing. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. A conformal log-periodic antenna array, the array comprising a plurality of broadband log-periodic antenna assemblies, each antenna assembly comprising:
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a) a printed wiring board having front and back sides; b) a plurality of non-overlappying log-periodic antennas etched upon at least one side of the printed wiring board, each log-periodic antenna separated by a spacing extending generally radially from a common point, each log-periodic antenna comprising a plurality of antenna elements extending from a common trunk, the trunk of each log-periodic antenna extending generally radially from the common point; c) a foam spacer having front and back sides disposed at the back side of the printed wiring board; d) a dielectric layer having front and back sides disposed at the back of the foam spacer; e) an absorber layer having front and back sides disposed at the back of the dielectric layer; f) a metal backing disposed at the back side of the absorber layer for reflecting lower frequency electromagnetic radiation back to the antennas so as to enhance an intensity thereof; g) wherein the dielectric layer enhances response across a broadband and the foam spacer positions the antennas a desired distance from the metal backing.
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26. A conformal log-periodic antenna array, the array comprising a plurality of broadband log-periodic antenna assemblies, each antenna assembly comprising:
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a) a printed wiring board having front and back sides; b) a plurality of log-periodic antennas etched upon at least one side of the printed wiring board, each log-periodic antenna comprising a plurality of antenna elements extending from a common trunk, the trunk of each log-periodic antenna extending generally radially from a common point; c) a resistive film formed at a distal end of at least one of the plurality of antenna elements so as to enhance a response of the elements; d) a foam spacer having front and back sides disposed at the back side of the printed wiring board; e) a dielectric layer having front and back sides disposed at the back of the foam spacer; f) an absorber layer having front and back sides disposed at the back of the dielectric layer; g) a metal backing disposed at the back side of the absorber layer for reflecting lower frequency electromagnetic radiation back to the antennas so as to enhance an intensity thereof; h) wherein the dielectric layer enhances response across a broadband and the foam spacer positions the antennas a desired distance from the metal backing.
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27. A conformal log-periodic antenna array, the array comprising a plurality of broadband log-periodic antenna assemblies, each antenna assembly comprising:
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a) a printed wiring board having front and back sides; b) a plurality of log-periodic antenna etched upon at least one side of the printed wiring board, each log-periodic antenna comprising a plurality of antenna elements extending from a common trunk, the trunk of each log-periodic antenna extending generally radially from a common point; c) a resistive film formed at a distal end of the plurality of antenna elements so as to increase an apparent length thereof and thus enhance a response of the elements to lower frequencies; d) a foam spacer having front and back sides disposed at the back side of the printed wiring board; e) a dielectric layer having front and back sides disposed at the back of the foam spacer; f) an absorber layer having front and back sides disposed at the back of the dielectric layer; g) a metal backing disposed at the back side of the absorber layer for reflecting lower frequency electromagnetic radiation back to the antennas so as to enhance an intensity thereof; h) wherein the dielectric layer enhances response across a broadband and the foam spacer positions the antennas a desired distance from the metal backing.
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28. A conformal log-periodic antenna assembly having a broadband frequency response, the antenna assembly comprising;
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a) a printed wiring board having front and back sides; b) a plurality of non-overlapping log-periodic antennas etched upon at least one side of the printed wiring board, each log-periodic antenna separated by a spacing extending generally radially from a common point, each log-periodic antenna comprising a plurality of antenna elements extending from a common trunk, the trunk of each log-periodic antenna extending generally radially from the common point; c) a resistive film formed at a distal end of at least one of the plurality of antenna elements so as to enhance a response of the elements; d) a foam spacer having front and back sides disposed at the back side of the printed wiring board; e) a dielectric layer having front and back sides disposed at the back of the foam spacer; f) an absorber layer having front and back sides disposed at the back of the dielectric layer; g) a metal backing disposed at the back side of the absorber layer for reflecting lower frequency electromagnetic radiation back to the antennas so as to enhance an intensity thereof; h) wherein the dielectric layer enhances response across a broadband and the foam spacer positions the antennas a desired distance from the metal backing.
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29. A conformal log-periodic antenna assembly having a broadband frequency response, the antenna assembly comprising:
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a) a printed wiring board having front and back sides; b) a plurality of non-overlapping log-periodic antennas etched upon at least one side of the printed wiring board, each log-periodic antenna separated by a spacing extending generally radially from a common point, each log-periodic antenna comprising a plurality of antenna elements extending from a common trunk, the trunk of each log-periodic antenna extending generally radially from the common point; c) a resistive film formed at a distal end of the plurality of antenna elements so as to increase an apparent length thereof and thus enhance a response of the elements to lower frequencies; d) a foam spacer having front and back sides disposed at the back side of the printed wiring board; e) a dielectric layer having front and back sides disposed at the back of the foam spacer; f) an absorber layer having front and back sides disposed at the back of the dielectric layer; g) a metal backing disposed at the back side of the absorber layer for reflecting lower frequency electromagnetic radiation back to the antennas so as to enhance an intensity thereof; g) wherein the dielectric layer enhances response across a broadband and the foam spacer positions the antennas a desired distance from the metal backing.
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Specification