US4901028A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Field emitter array integrated distributed amplifiers
Assignee: UNITED STATES OF AMERICAN THENAVY, Secretary of
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Filing: 1988-03-22
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Granted: 1990-02-13
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Expires: 2008-03-22
Abstract
Abstract Distributed amplifiers in integrated circuit form wherein dielectric material and electrically conductive material combine to form field emitter cathodes, grids, and anodes in a module forming one or more amplifier cells embedded in a matrix of reactive impedances that form companion stripline-like transmission lines in a vacuum or sufficiently low pressure gas such that electrons remain unscattered during travel over trajectories from cathode to anode in a cell.
Inventors
- 👤 Henry F. Gray
- 👤 Richard F. Greene
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:36
CPC Classifications
H; H03; H03F; H03F1/00; H03F1/08; H03F1/18; H01; H01J; H01J3/00; H01J3/02; H01J3/021; H01J3/022; H03F3/00; H03F3/60; H03F3/605
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
107 words
A distributed amplifier comprising, a grid; a collector; and a field emitter; wherein said grid and said emitter are adapted to form an input electromagnetic waveguide for said amplifier, and said collector and said emitter are adapted to form an output electromagnetic waveguide for said amplifier, both said input electromagnetic waveguide and said output electromagnetic waveguide being adapted to have equal impedance effective to cause the speed of electromagnetic propagation in each said waveguide to be substantially equal; and wherein said emitter is in the shape of an elongate wedge disposed along an elongate distance substantially parallel to the direction of electromagnetic propagation in each said waveguide.
Claim 2
Dependent Claim
107 words
A distributed amplifier comprising, a grid; a collector; and a field emitter; wherein said grid and said emitter are adapted to form an input electromagnetic waveguide for said amplifier, and said collector and said emitter are adapted to form an output electromagnetic waveguide for said amplifier, both said input electromagnetic waveguide and said output electromagnetic waveguide being adapted to have equal impedance effective to cause the speed of electromagnetic propagation in each said waveguide to be substantially equal; and wherein said emitter is in the shape of an elongate wedge disposed along an elongate distance substantially parallel to the direction of electromagnetic propagation in each said waveguide.
Claim 3
Dependent Claim
25 words
The amplifier of claim 1, wherein said grid is a pair of elongate ridges extending along said elongate distance on either side of said emitter.
Claim 4
Dependent Claim
18 words
The amplifier of claim 2, wherein said elongate wedge has a pointed apex extending along said elongate distance.
Claim 5
Dependent Claim
26 words
The amplifier of claim 3, wherein said elongate wedge is generally triangularly shaped in cross-section taken by a plane perpendicular to said direction of electromagnetic propagation.
Claim 6
Dependent Claim
13 words
The amplifier of claim 4, wherein said elongate distance is a straight line.
Claim 7
Dependent Claim
20 words
The amplifier of claim 5, wherein said grid, said collector, and said emitter are formed unitarily in a semiconductor monolith.
Claim 8
Dependent Claim
18 words
The amplifier of claim 1, wherein said elongate wedge has a pointed apex extending along said elongate distance.
Claim 9
Dependent Claim
27 words
The amplifier of claim 1, wherein said elongate wedge is generally triangularly shaped in cross-section taken by a plane perpendicular to the said direction of electromagnetic propagation.
Claim 10
Dependent Claim
13 words
The amplifier of claim 1, wherein said elongate distance is a straight line.
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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) | 1993-02-12 | 1993-08-14 | 1994-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-02-12 | 1997-08-14 | 1998-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-02-12 | 2001-08-14 | 2002-02-13 | $7700.00 | Window Closed / Lapsed |