Patent US5471180A successfully refreshed from Google Patents.
US5471180A
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Low-loss dielectric resonant devices having lattice structures with elongated resonant defects
Assignee: Lockheed Martin Corp
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Filing: 1992-02-13
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Granted: 1995-11-28
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Expires: 2012-02-13
Abstract
Abstract A dielectric resonator comprising a resonant defect structure diposed in a lattice structure formed of a plurality of multi-dimensional periodically arranged dielectric elements confines electromagnetic energy within a frequency band in the photonic band gap. The frequency band of the confined electromagnetic energy is tunable. The unique structure of the dielectric resonator leads to reduced power dissipation losses when used in microwave and millimeter wave components. Accordingly, the dielectric resonator may be used to produce high quality resonant cavities, filters and power generators.
Inventors
- 👤 Karl Brommer
- 👤 Henry Mullaney
- 👤 Robert Meade
- 👤 Andrew Rappe
- 👤 John Joannopoulos
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 14:51
CPC Classifications
H; H01; H01Q; H01Q15/00; H01Q15/0006; H01Q15/006; B; B82; B82Y; B82Y20/00; G; G02; G02B; G02B27/00; G02B27/42; G02B27/46; G02B5/00; G02B5/18; G02B5/20; G02B5/28; G02B6/00; G02B6/10; G02B6/12; G02B6/122; G02B6/1225; H01P; H01P1/00; H01P1/20; H01P1/2005; H01P1/207; G02F; G02F2202/00; G02F2202/32; H01S; H01S5/00; H01S5/10; H01S5/1042; H01S5/11; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/25
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
125 words
A dielectric device comprising: a first dielectric material for receiving electromagnetic energy; a lattice structure comprised of a plurality of elongate elements of a second dielectric material extending substantially in parallel to each other in a two-dimensional periodic arrangement within the first dielectric material, said lattice structure having dimensions proportioned such that electromagnetic energy having frequencies within a first frequency band is prevented from propagating through the lattice structure; and a resonant defect structure located within the lattice structure for introducing a lattice imperfection into the lattice structure, the resonant defect structure having a resonant frequency within a second frequency band within the first frequency band such that electromagnetic energy having frequencies within the second frequency band is allowed to propagate through the lattice structure.
Claim 2
Dependent Claim
125 words
A dielectric device comprising: a first dielectric material for receiving electromagnetic energy; a lattice structure comprised of a plurality of elongate elements of a second dielectric material extending substantially in parallel to each other in a two-dimensional periodic arrangement within the first dielectric material, said lattice structure having dimensions proportioned such that electromagnetic energy having frequencies within a first frequency band is prevented from propagating through the lattice structure; and a resonant defect structure located within the lattice structure for introducing a lattice imperfection into the lattice structure, the resonant defect structure having a resonant frequency within a second frequency band within the first frequency band such that electromagnetic energy having frequencies within the second frequency band is allowed to propagate through the lattice structure.
Claim 3
Dependent Claim
20 words
A dielectric device as claimed in claim 1 wherein each one of the elongate elements is a substantially cylindrical rod.
Claim 4
Dependent Claim
32 words
A dielectric device as claimed in claim 1 wherein the resonant defect structure comprises a low-dielectric elongate cavity extending through the first dielectric material in a direction parallel to the elongate elements.
Claim 5
Dependent Claim
41 words
A dielectric device as claimed in claim 3 wherein the elongate cavity has a circular cylindrical shape and has a resonant frequency corresponding to a center frequency of the second frequency band proportional to a cross-sectional radius of the elongate cavity.
Claim 6
Dependent Claim
25 words
A dielectric device as claimed in claim 1 wherein the first frequency band is within a frequency range of 10 6 to 10 15 Hz.
Claim 7
Dependent Claim
18 words
A dielectric device as claimed in claim 1 in which the lattice structure is a triangular lattice structure.
Claim 8
Dependent Claim
16 words
A dielectric device as claimed in claim 1 in which the first dielectric material comprises air.
Claim 9
Dependent Claim
16 words
A dielectric device as claimed in claim 1 in which the second dielectric material comprises air.
Claim 10
Dependent Claim
26 words
A dielectric device as claimed in claim 1 wherein: the first dielectric material is a high-dielectric material; and the second dielectric material is a low-dielectric material.
Claim 11
Dependent Claim
76 words
A dielectric device as claimed in claim 1 further comprising a waveguide within which the first dielectric material, the lattice structure and the resonant defect are located, the waveguide having an input end for coupling electromagnetic energy into the lattice structure and an output end for coupling out of the lattice structure electromagnetic energy having frequencies within the second frequency band and propagating in a direction substantially orthogonal to a longitudinal axis through each elongated element.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-11-27 | 1999-05-29 | 1999-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-11-27 | 2003-05-29 | 2003-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-11-27 | 2007-05-29 | 2007-11-28 | $7700.00 | Window Closed / Lapsed |