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US3900806A
Expired / Lapsed
US
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Group-delay equalizer using a meander folded transmission line
Assignee: SELENIZ IND ELETTRONICHE ASSOC
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Filing: 1974-04-04
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Granted: 1975-08-19
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Expires: 1994-04-04
Abstract
Abstract A group-delay equalizer for microwave frequencies, comprising a meander folded transmission line, comprising means for separately changing the electric wave lengths of said folded transmission line associated with two different modes of propagation of the electromagnetic energy along said line.
Inventors
- 👤 Ignazio Caroli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 05:55
CPC Classifications
H; H01; H01P; H01P9/00; H01P9/003
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
156 words
A group-delay equalizer for microwave frequencies, comprising a meander folded transmission line, and adjusting means for changing separately the electric lengths of said folded transmission line associated to two different modes of propagation of the electromagnetic energy along said line, wherein said folded line is located between two ground planes, said adjusting means comprising a first block of substantially homogeneous dielectric material into which is immersed the aforesaid strip line partially folded lengthwise, a second block of dielectric material substantially similar to said first dielectric block of which it is possible to adjust the immersion of said line; means for changing the distance of one of said ground planes with respect to the outeR surface of said first dielectric block, and means for changing the distance of the other of said ground planes to which is fixed said second dielectric block in order to change the immersion of said second dielectric block into said folded line.
Claim 2
Dependent Claim
156 words
A group-delay equalizer for microwave frequencies, comprising a meander folded transmission line, and adjusting means for changing separately the electric lengths of said folded transmission line associated to two different modes of propagation of the electromagnetic energy along said line, wherein said folded line is located between two ground planes, said adjusting means comprising a first block of substantially homogeneous dielectric material into which is immersed the aforesaid strip line partially folded lengthwise, a second block of dielectric material substantially similar to said first dielectric block of which it is possible to adjust the immersion of said line; means for changing the distance of one of said ground planes with respect to the outeR surface of said first dielectric block, and means for changing the distance of the other of said ground planes to which is fixed said second dielectric block in order to change the immersion of said second dielectric block into said folded line.
Claim 3
Dependent Claim
24 words
A device as claimed in claim 1, characterized in that said blocks of dielectric material comprise different amounts of dielectric in the active zone.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-08-18 | 1979-02-17 | 1979-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-18 | 1983-02-17 | 1983-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-18 | 1987-02-17 | 1987-08-19 | $7700.00 | Window Closed / Lapsed |