US4638271A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of incrementally adjusting the center frequency of a microstrip-line printed filter by manuevering dielectric layers
Assignee: Thales SA
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Filing: 1984-05-25
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Granted: 1987-01-20
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Expires: 2004-05-25
Abstract
Abstract A method is provided for adjusting the electrical characteristics and particularly the frequency of a microstrip-line printed filter with distributed constants. The method consists in depositing a strip of dielectric material on all the microstrip resonators of the filter.
Inventors
- 👤 Jean-Rene Jecko
- 👤 Marcel Motola
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:08
CPC Classifications
H; H01; H01P; H01P1/00; H01P1/20; H01P1/201; H01P1/203
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
77 words
A method for fabricating a printed circuit filter having a reversibly adjustable center frequency, the method comprising the steps: forming a plurality of microstrip resonators in generally parallel relationship on a substrate; depositing a main dielectric material strip lengthwise along the substrate and generally perpendicularly across the parallel resonators to achieve an initial filter center frequency; incrementally maneuvering dielectric strip sections to and from the main dielectric strip to effect incremental center frequency shifts of the filter.
Claim 2
Independent Claim
77 words
A method for fabricating a printed circuit filter having a reversibly adjustable center frequency, the method comprising the steps: forming a plurality of microstrip resonators in generally parallel relationship on a substrate; depositing a main dielectric material strip lengthwise along the substrate and generally perpendicularly across the parallel resonators to achieve an initial filter center frequency; incrementally maneuvering dielectric strip sections to and from the main dielectric strip to effect incremental center frequency shifts of the filter.
Claim 3
Independent Claim
82 words
A method for fabricating a printed circuit filter having a reversibly adjustable center frequency, the method comprising the steps: forming a plurality of microstrip resonators in generally parallel relationship on a substrate; depositing a stack of aligned individual layers of dielectric material lengthwise along the substrate and generally perpendicularly across the parallel resonators to achieve an initial filter center frequency; incrementally maneuvering individual ones of the dielectric layers to and from the stack corresponding to incremental center frequency shifts of the filter.
Claim 4
Independent Claim
82 words
A method for fabricating a printed circuit filter having a reversibly adjustable center frequency, the method comprising the steps: forming a plurality of microstrip resonators in generally parallel relationship on a substrate; depositing a stack of aligned individual layers of dielectric material lengthwise along the substrate and generally perpendicularly across the parallel resonators to achieve an initial filter center frequency; incrementally maneuvering individual ones of the dielectric layers to and from the stack corresponding to incremental center frequency shifts of the filter.
Claim 5
Dependent Claim
45 words
The method set forth in claim 2 wherein the individual layers of dielectric material have different dielectric constants, the maneuvering of individual layers resulting in a corresponding incremental change in the center frequency of the filter dependent upon the dielectric constant of the maneuvered layer.
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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) | 1990-01-19 | 1990-07-21 | 1991-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-01-19 | 1994-07-21 | 1995-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-01-19 | 1998-07-21 | 1999-01-20 | $7700.00 | Window Closed / Lapsed |