US3585536A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reciprocal,microstrip,latched,ferrite phase shifter
Assignee: Westinghouse Electric Corp
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Filing: 1970-02-16
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Granted: 1971-06-15
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Expires: 1990-02-16
Abstract
Abstract Described is a latching ferrite phase shifter for microstrip transmission lines compatible with integrated circuits and incorporating two ferrite materials deposited by vapor deposition techniques, one of the ferrite materials being in the path of the electromagnetic wave passing along the microstrip circuit and designed to control the amount of phase shift produced by the phase shifter, and the other of the ferrite materials exercising a magnetostatic interaction with the first or forming a connected magnetic circuit and having a coercive force greater than that of the first to hold the first in the magnetized state.
Inventors
- 👤 Aleksander I Braginski
- 👤 Daniel C Buck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 00:06
CPC Classifications
H; H01; H01P; H01P1/00; H01P1/18; H01P1/19
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
124 words
A reciprocal latching ferrite phase shifter comprising a substrate of ferrite material, a metallic microstrip conductor and a latching conductor coplanar with and perpendicular to the said microstrip conductor, both plated on the substrate surface so that portions of said surface are exposed on either side of the conductors, conductive material deposited on the other side of said substrate to form a ground plane, a dielectric nonmagnetic layer covering said conductors and at least a part of the ferrite substrate exposed surface, a second ferrite film deposited on the said dielectric layer and on the exposed substrate portions to form a magnetic circuit with the substrate, and means for connecting a source of pulsed electrical energy to the microstrip conductor and the latching conductor.
Claim 2
Dependent Claim
124 words
A reciprocal latching ferrite phase shifter comprising a substrate of ferrite material, a metallic microstrip conductor and a latching conductor coplanar with and perpendicular to the said microstrip conductor, both plated on the substrate surface so that portions of said surface are exposed on either side of the conductors, conductive material deposited on the other side of said substrate to form a ground plane, a dielectric nonmagnetic layer covering said conductors and at least a part of the ferrite substrate exposed surface, a second ferrite film deposited on the said dielectric layer and on the exposed substrate portions to form a magnetic circuit with the substrate, and means for connecting a source of pulsed electrical energy to the microstrip conductor and the latching conductor.
Claim 3
Dependent Claim
29 words
The phase shifter of claim 1, wherein both of said magnetic films have the same or similar saturation magnetization and microwave properties acceptable in the frequency band of operation.
Claim 4
Dependent Claim
43 words
The phase shifter of claim 1, wherein said second film of magnetic ferrite requires a square hysteresis loop and a greater coercive force to demagnetize it than said substrate of ferrite material in order to preserve the desired magnetization state of the substrate.
Claim 5
Dependent Claim
43 words
The phase shifter of claim 1, wherein said second ferrite film is only partly separated from said substrate by means of said dielectric layer and forms with the substrate completely closed magnetic circuits around said latching conductor and around said microstrip conductor simultaneously.
Claim 6
Dependent Claim
33 words
The phase shifter of claim 1, wherein said second ferrite film is entirely separated from said substrate by means of said dielectric layer and forms with the substrate a magnetostatically coupled magnetic circuit.
Claim 7
Dependent Claim
27 words
The phase shifter of claim 1, wherein said dielectric, nonmagnetic and separating layer is selected from the group consisting of aluminum oxide, magnesia silicate or beryllium oxide.
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) | 1974-06-14 | 1974-12-14 | 1975-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-14 | 1978-12-14 | 1979-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-14 | 1982-12-14 | 1983-06-15 | $7700.00 | Window Closed / Lapsed |