Balanced dual-band embedded antenna
First Claim
Patent Images
1. A planar antenna, comprising:
- a dielectric layer; and
a first conductive layer mechanically coupled to the dielectric layer, the first conductive layer comprising;
a first arm having a shape defined by a first outer border comprising a first conic section and a first inner border comprising a second conic section;
a feed line coupled to the first arm at a feedpoint location at or near a central axis of the first arm; and
a second arm offset from the first arm along the central axis of the first arm, the second arm defined by a shape at least in part mirroring a shape of the first arm; and
wherein at least a portion of the feed line bifurcates the second arm into at least two portions;
wherein the at least two portions of the second arm are conductively coupled to a return conductor;
wherein the first and second arms comprise respective conductive strips including a lateral width that varies along the central axis;
wherein the respective conductive strips include a lateral width tapering from a wider width near the feedpoint location to a narrower width away from the feedpoint location; and
wherein the respective conductive strips include a lateral width that widens again at respective distal tips of the conductive strips away from the feedpoint location.
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Abstract
A planar antenna, such as included as a portion of a printed circuit board (PCB) assembly, can include a dielectric layer and a first conductive layer mechanically coupled to the dielectric layer. In an example, the first conductive layer can include a first arm having a shape defined by a first outer border comprising a first conic section and a first inner border comprising a second conic section, a feed line coupled to the first arm at a feedpoint location at or near a central axis of the first arm, and a second arm offset from the first arm along the central axis of the first arm, the second arm defined by a shape at least in part mirroring a shape of the first arm.
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Citations
16 Claims
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1. A planar antenna, comprising:
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a dielectric layer; and a first conductive layer mechanically coupled to the dielectric layer, the first conductive layer comprising; a first arm having a shape defined by a first outer border comprising a first conic section and a first inner border comprising a second conic section; a feed line coupled to the first arm at a feedpoint location at or near a central axis of the first arm; and a second arm offset from the first arm along the central axis of the first arm, the second arm defined by a shape at least in part mirroring a shape of the first arm; and wherein at least a portion of the feed line bifurcates the second arm into at least two portions; wherein the at least two portions of the second arm are conductively coupled to a return conductor; wherein the first and second arms comprise respective conductive strips including a lateral width that varies along the central axis; wherein the respective conductive strips include a lateral width tapering from a wider width near the feedpoint location to a narrower width away from the feedpoint location; and wherein the respective conductive strips include a lateral width that widens again at respective distal tips of the conductive strips away from the feedpoint location. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A planar antenna, comprising:
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a dielectric layer; and a first conductive layer mechanically coupled to the dielectric layer, the first conductive layer comprising; a first arm having a shape defined by a first outer border comprising a first conic section and a first inner border comprising a second conic section; a feed line coupled to the first arm at a feedpoint location at or near a central axis of the first arm; and a second arm offset from the first arm along the central axis of the first arm, the second arm defined by a shape at least in part mirroring a shape of the first arm; and wherein at least a portion of the feed line bifurcates the second arm into at least two portions; and wherein the at least two portions of the second arm are conductively coupled to a return conductor; wherein the first and second arms comprise respective conductive strips including a lateral width that varies along the central axis; wherein the respective conductive strips include a lateral width tapering from a wider width near the feedpoint location to a narrower width away from the feedpoint location; and wherein the respective conductive strips include a lateral width that widens again at respective distal tips of the conductive strips away from the feedpoint location; and a second conductive layer mechanically coupled to the dielectric layer, the second conductive layer comprising; a first conductor including a footprint substantially the same as the first arm and conductively coupled through one or more conductive vias through the dielectric layer to the first arm; and a second conductor conductively isolated from the first conductor and including a footprint substantially the same as the second arm and conductively coupled through one or more conductive vias through the dielectric layer to the second arm; and wherein the feed line is located laterally between respective return conductors comprising the at least two portions of the second arm.
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10. A method for providing a planar antenna, comprising
forming a dielectric layer; - and
forming a first conductive layer mechanically coupled to the dielectric layer, the forming the first conductive layer comprising; forming a first arm having a shape defined by a first outer border comprising a first conic section and a first inner border comprising a second conic section; forming a feed line coupled to the first arm at a feedpoint location at or near a central axis of the first arm; and forming a second arm offset from the first arm along the central axis of the first arm, the second arm defined by a shape at least in part mirroring a shape of the first arm; and forming a return conductor; and wherein at least a portion of the feed line bifurcates the second arm into at least two portions; and wherein the at least two portions of the second arm are conductively coupled to the return conductor; wherein the first and second arms comprise respective conductive strips including a lateral width that varies along the central axis; wherein the respective conductive strips include a lateral width tapering from a wider width near the feedpoint location to a narrower width away from the feedpoint location; and wherein the respective conductive strips include a lateral width that widens again at respective distal tips of the conductive strips away from the feedpoint location. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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Specification