US3609613A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low loss transmission-line transformer
Assignee: United States Department of the Army
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Filing: 1970-11-03
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Granted: 1971-09-28
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Expires: 1990-11-03
Abstract
Abstract This disclosure relates to transmission-line transformers and particularly to transmission-line transformers formed of parallel-pair conductors. More particularly, this disclosure relates to parallel-stripline or ribbon-type conductors wound about the periphery of a toroidal core to form a pair of inductively coupled, series-connected loops to serve as the halves of a 4 to 1 ratio, transmission-line transformer.
Inventors
- 👤 Robert E Horn
- 👤 Octavius Pitzalis Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:24
CPC Classifications
H; H03; H03H; H03H7/00; H03H7/38; H01; H01F; H01F27/00; H01F27/28; H01F27/2847; H01F30/00; H01F30/06; H01F30/10; H01F2027/2857
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
100 words
A transmission-line transformer for stripline conductors comprising at least one spiral winding of two turns of a single flat, ribbon-type parallel-stripline conductor, said spiral winding having an outer-end connection, a center tap, and a grounded, inner-end connection; a source of input signals having a grounded side and an ungrounded side; a utilization circuit having a grounded side and an ungrounded side; means for connecting said outer-end connection of said spiral winding to said ungrounded side of said source of input signals; and means for connecting said center tap of said spiral winding to said ungrounded side of said utilization circuit.
Claim 2
Dependent Claim
100 words
A transmission-line transformer for stripline conductors comprising at least one spiral winding of two turns of a single flat, ribbon-type parallel-stripline conductor, said spiral winding having an outer-end connection, a center tap, and a grounded, inner-end connection; a source of input signals having a grounded side and an ungrounded side; a utilization circuit having a grounded side and an ungrounded side; means for connecting said outer-end connection of said spiral winding to said ungrounded side of said source of input signals; and means for connecting said center tap of said spiral winding to said ungrounded side of said utilization circuit.
Claim 3
Dependent Claim
80 words
a transmission-line transformer as in claim 1 having a plurality of said spiral windings of substantially the same size, positioned adjacent to each other, with said center tap at the output of each of said spiral windings being connected to said outer-end connection at the input of the next, adjacent one of said spiral windings; and said center tap at the output of the last one of said spiral windings being connected to said ungrounded side of said utilization circuit.
Claim 4
Dependent Claim
20 words
A transmission-line transformer as in claim 1 having a ferrite core positioned in an inductive relationship with said spiral winding.
Claim 5
Dependent Claim
34 words
A transmission-line transformer as in claim 3 wherein said ferrite core comprises a toroidal structure having a cylindrical outer surface, and said parallel-stripline conductor is wound around said outer surface of said toroidal structure.
Claim 6
Dependent Claim
16 words
A transmission-line transformer as in claim 3 wherein said ferrite core completely surrounds said spiral winding.
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) | 1974-09-27 | 1975-03-29 | 1975-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-27 | 1979-03-29 | 1979-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-27 | 1983-03-29 | 1983-09-28 | $7700.00 | Window Closed / Lapsed |