EP1286418A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Resonant antennas
Assignee: Nokia of America Corp
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Filing: 2002-07-16
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Granted: —
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Expires: 2022-07-16
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
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 14:53
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: 10
Claim 1
Independent Claim
49 words
An apparatus, comprising: an object formed of a material having an ε or a µ whose real part is
negative 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 a magnetic field therein.
Claim 2
Dependent Claim
24 words
The apparatus of claim 1, wherein the value of the real part causes the
object to respond resonantly to external electric or magnetic fields.
Claim 3
Dependent Claim
11 words
The apparatus of claim 2, wherein the material is a metamaterial.
Claim 4
Dependent Claim
26 words
The apparatus of claim 3, 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
24 words
The apparatus of claim 2, wherein the sensor is positioned to measure
a resonant response to external fields having frequencies in a preselected range.
Claim 6
Dependent Claim
26 words
The apparatus of claim 4, further comprising: an amplifier is coupled to the one or more sensors and is configured to
amplify signals at microwave frequencies.
Claim 7
Independent Claim
59 words
A method, comprising: exciting an object by receiving microwave radiation, the object having
either a dielectric constant with a negative real part at microwave frequencies or a
magnetic permeability 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.
Claim 8
Dependent Claim
30 words
The method of claim 7, 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 9
Dependent Claim
11 words
The method of claim 7, wherein the object comprises a metamaterial.
Claim 10
Dependent Claim
27 words
The method of claim 7, wherein the detecting further comprises: measuring a resonant response in the object to external fields having
frequencies in a preselected communication range.
References Cited (Backward Citations)
US6002368A
Cited
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