US6661392B2
Expired / Lapsed
US
⏱️ 0.0 years remaining
Resonant antennas
Assignee: Nokia of America Corp
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Filing: 2002-03-04
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Granted: 2003-12-09
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Expires: 2022-03-04
Abstract
Abstract An apparatus includes an object and one or more sensors located adjacent to or in the object. The object is formed of a material whose dielectric constant or magnetic permeability has a negative real part at microwave-frequencies. The one or more sensors are located adjacent to or in the object and measure an intensity of an electric or a magnetic field therein.
Inventors
- 👤 Eric D Isaacs
- 👤 Philip Moss Platzman
- 👤 Jung-Tsung Shen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 14:48
CPC Classifications
H; H01; H01Q; H01Q15/00; H01Q15/02; H01Q15/08; H01Q13/00; H01Q13/20; H01Q13/28; H01Q9/00; H01Q9/04; H01Q9/0485
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
76 words
An apparatus, comprising: an object formed of a material in which one of the dielectric constant and the magnetic permeability has a value with a negative real part at microwave frequencies; and one or more sensors located adjacent to or in the object and configured to measure an intensity of an electric or magnetic field therein; and wherein the value of the real part causes the object to respond resonantly to external electric or magnetic fields.
Claim 2
Independent Claim
76 words
An apparatus, comprising: an object formed of a material in which one of the dielectric constant and the magnetic permeability has a value with a negative real part at microwave frequencies; and one or more sensors located adjacent to or in the object and configured to measure an intensity of an electric or magnetic field therein; and wherein the value of the real part causes the object to respond resonantly to external electric or magnetic fields.
Claim 3
Dependent Claim
12 words
The apparatus of claim 1 , wherein the material is a metamaterial.
Claim 4
Dependent Claim
27 words
The apparatus of claim 2 , further comprising: a microwave receiver, the object and one or more sensors configured to function as an antenna for the receiver.
Claim 5
Dependent Claim
28 words
The apparatus of claim 3 , further comprising: an amplifier that is coupled to the one or more sensors and is configured to amplify signals at microwave frequencies.
Claim 6
Dependent Claim
30 words
The apparatus of claim 3 , further comprising: a cellular telephone or handheld wireless device, the microwave receiver configured to receive communications for the cellular telephone or handheld wireless device.
Claim 7
Dependent Claim
20 words
The apparatus of claim 1 , wherein one of the sensors is located adjacent an external surface of the object.
Claim 8
Dependent Claim
39 words
The apparatus of claim 1 , wherein the one or more sensors is positioned to measure a resonant response to external fields having wavelengths in a preselected range, the wavelengths being longer than the linear dimensions of the object.
Claim 9
Dependent Claim
24 words
The apparatus of claim 1 , wherein the object is substantially spherical and the real part is equal to −2±0.2 at a microwave frequency.
Claim 10
Dependent Claim
25 words
The apparatus of claim 1 , further comprising: an amplifier configured to generate electrical signals in the one or more sensors at a microwave frequency.
Claim 11
Dependent Claim
19 words
The apparatus of claim 1 , wherein the object is shaped like one of a cube and a cylinder.
Claim 12
Independent Claim
88 words
A method, comprising: exciting an object by receiving microwave radiation therein, the object being formed of a material in which one of a dielectric constant and a magnetic permeability has a value with a negative real part at microwave frequencies; and detecting a field intensity internal or adjacent to the object in response to the object being excited by the microwave radiation; and wherein the receiving produces a resonant response in one of a magnetic field intensity in the object and an electric field intensity in the object.
Claim 13
Independent Claim
88 words
A method, comprising: exciting an object by receiving microwave radiation therein, the object being formed of a material in which one of a dielectric constant and a magnetic permeability has a value with a negative real part at microwave frequencies; and detecting a field intensity internal or adjacent to the object in response to the object being excited by the microwave radiation; and wherein the receiving produces a resonant response in one of a magnetic field intensity in the object and an electric field intensity in the object.
Claim 14
Dependent Claim
15 words
The method of claim 11 , wherein the detected field intensity is a magnetic flux.
Claim 15
Dependent Claim
14 words
The method of claim 11 , wherein the detected field intensity is a voltage.
Claim 16
Dependent Claim
12 words
The method of claim 11 , wherein the object comprises a metamaterial.
Claim 17
Dependent Claim
39 words
The method of claim 11 , wherein the detecting further comprises: measuring a resonant response in the object to external fields having wavelengths in a preselected communication range, the wavelengths being longer than the linear dimensions of the object.
References Cited (Backward Citations)
US4090198A
Cited
US3543271A
Cited
US3765024A
Cited
US6002368A
Cited
US6046701A
Cited
US6424319B2
Cited
US6473050B2
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2006-12-08 | 2007-06-09 | 2007-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2010-12-08 | 2011-06-09 | 2011-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2014-12-08 | 2015-06-09 | 2015-12-09 | $7700.00 | Window Closed / Lapsed |