US3594812A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Strip line ferrite phase shifter
Assignee: Westinghouse Electric Corp
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Filing: 1969-07-17
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Granted: 1971-07-20
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Expires: 1989-07-17
Abstract
Abstract Described is a small, lightweight ferrite phase shifter, constructed in a strip line wave energy transmission assemblage, which is small enough to fit into a steerable antenna array while at the same time providing good electrical isolation between adjacent phase shifters in the array.
Inventors
- 👤 Daniel C Buck
- 👤 Theodore M Nelson
- 👤 Robert A Moore
- 👤 Leonard Dubrowsky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:48
CPC Classifications
H; H01; H01Q; H01Q3/00; H01Q3/26; H01Q3/30; H01Q3/34; H01Q3/36; H01P; H01P1/00; H01P1/18; H01P1/19
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
73 words
A ferrite phase shifter for electromagnetic wave energy comprising a strip line conductor sandwiched between a pair of ferrite slabs, a casing of metallic material surrounding said ferrite slabs and comprising a ground plane, an electromagnetic coil surrounding said casing and adapted to produce A magnetic field extending along the length of said strip line conductor, and a magnetic shield of magnetically permeable material surrounding said coil and connected to said ground plane.
Claim 2
Dependent Claim
73 words
A ferrite phase shifter for electromagnetic wave energy comprising a strip line conductor sandwiched between a pair of ferrite slabs, a casing of metallic material surrounding said ferrite slabs and comprising a ground plane, an electromagnetic coil surrounding said casing and adapted to produce A magnetic field extending along the length of said strip line conductor, and a magnetic shield of magnetically permeable material surrounding said coil and connected to said ground plane.
Claim 3
Dependent Claim
20 words
The ferrite phase shifter of claim 1 wherein wave energy travels along said strip line conductor in the TEM mode.
Claim 4
Dependent Claim
24 words
The ferrite phase shifter of claim 1 wherein said casing of metallic material, said coil and said shield are generally rectangular in cross section.
Claim 5
Dependent Claim
25 words
The ferrite phase shifter of claim 1 wherein said shield is provided with tabs at at least one end thereof extending beyond said ferrite slabs.
Claim 6
Dependent Claim
22 words
The ferrite phase shifter of claim 3 wherein said shield is provided with tabs at both ends thereof on opposite sidewalls thereof.
Claim 7
Dependent Claim
55 words
The ferrite phase shifter of claim 5 including a dipole antenna at one end of the phase shifter, one element of the dipole antenna being connected to said casing and the other element of the dipole antenna being connected to one end of said strip line conductor at said one end of the phase shifter.
Claim 8
Dependent Claim
38 words
The ferrite phase shifter of claim 6 including a strip line transmission line connected to said phase shifter with the center conductor of the transmission line in engagement with the strip line conductor sandwiched between said ferrite slabs.
Claim 9
Dependent Claim
30 words
The ferrite phase shifter of claim 7 wherein the ground planes of said strip line transmission line are in engagement with said casing of metallic material surrounding said ferrite slabs.
Claim 10
Dependent Claim
25 words
The ferrite phase shifter of claim 1 including permanent magnets at opposite ends of said ferrite slabs, said coil being interposed between said permanent magnets.
Claim 11
Dependent Claim
34 words
The ferrite phase shifter of claim 9 wherein said permanent magnets produce a north pole at one end of said ferrite slabs and a south pole at the other end of the ferrite slabs.
Claim 12
Dependent Claim
38 words
The ferrite phase shifter of claim 1 wherein said casing is provided with flanges at opposite ends thereof and said shield is wound around and connected to said flanges, said casing and flanges acting as a heat sink.
Claim 13
Dependent Claim
22 words
The ferrite phase shifter of claim 6 wherein said other element of the dipole antenna is integral with said strip line conductor.
Claim 14
Dependent Claim
35 words
The ferrite phase shifter of claim 6 wherein said one element of the dipole antenna is integral with said casing and said other element of the dipole antenna is integral with said strip line conductor.
References Cited (Backward Citations)
US3225318A
Cited
US3289115A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-19 | 1975-01-18 | 1975-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-19 | 1979-01-18 | 1979-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-19 | 1983-01-18 | 1983-07-20 | $7700.00 | Window Closed / Lapsed |