US4155053A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Enhanced coupling in ferrimagnetic microwave devices
Assignee: Micron Technology Inc
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Filing: 1977-06-30
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Granted: 1979-05-15
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Expires: 1997-06-30
Abstract
Abstract An improved microwave device for filtering and power limiting is described incorporating a yttrium-iron-garnet (YIG) sphere and a transmission line wherein coupling between the YIG sphere and the transmission line is enhanced by placing the YIG sphere in a groove in a ground plane under the transmission line. The current induced in the groove of the ground plane results in enhanced coupling.
Inventors
- 👤 Steven N. Stitzer
- 👤 Harry Goldie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:52
CPC Classifications
H; H01; H01P; H01P1/00; H01P1/20; H01P1/215; H01P1/218; H03; H03G; H03G11/00; H03G11/006
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
103 words
Apparatus for enhancing the magnetic coupling between a transmission line and YIG sphere comprising: a ground plane having a groove transverse to said transmission line; said YIG sphere positioned in said groove of said ground plane to provide magnetic coupling between said ground plane and said sphere; said transmission line positioned over said ground plane and YIG sphere; means for supporting and spacing said transmission line from said ground plane and said YIG sphere; and wherein said groove extends on both sides of said sphere for a predetermined distance to minimize the effects of currents in the ground plane at the groove ends.
Claim 2
Dependent Claim
103 words
Apparatus for enhancing the magnetic coupling between a transmission line and YIG sphere comprising: a ground plane having a groove transverse to said transmission line; said YIG sphere positioned in said groove of said ground plane to provide magnetic coupling between said ground plane and said sphere; said transmission line positioned over said ground plane and YIG sphere; means for supporting and spacing said transmission line from said ground plane and said YIG sphere; and wherein said groove extends on both sides of said sphere for a predetermined distance to minimize the effects of currents in the ground plane at the groove ends.
Claim 3
Dependent Claim
13 words
The apparatus of claim 1 wherein said ground plane is a metal plate.
Claim 4
Dependent Claim
14 words
The apparatus of claim 1 wherein said transmission line is a transmission line resonator.
Claim 5
Dependent Claim
13 words
The apparatus of claim 1 wherein said transmission line is a pseudo-radial resonator.
Claim 6
Dependent Claim
18 words
The apparatus of claim 1 including means for applying a static magnetic bias field to said YIG sphere.
Claim 7
Dependent Claim
75 words
Apparatus for enhancing the magnetic coupling between a transmission line and YIG sphere comprising: a ground plane having a groove orthogonal to said transmission line; said YIG sphere positioned in said groove of said ground plane to provide magnetic coupling between said ground plane and said sphere; said transmission line positioned over said ground plane and YIG sphere; and means for supporting and spacing said transmission line from said ground plane and said YIG sphere.
Claim 8
Dependent Claim
75 words
Apparatus for enhancing the magnetic coupling between a transmission line and YIG sphere comprising: a ground plane having a groove orthogonal to said transmission line; said YIG sphere positioned in said groove of said ground plane to provide magnetic coupling between said ground plane and said sphere; said transmission line positioned over said ground plane and YIG sphere; and means for supporting and spacing said transmission line from said ground plane and said YIG sphere.
Claim 9
Dependent Claim
89 words
Apparatus for enhancing the magnetic coupling between a transmission line and YIG sphere comprising: a ground plane having a groove; said YIG sphere positioned in said groove of said ground plane to provide magnetic coupling between said ground plane and said sphere; said transmission line positioned over said ground plane and YIG sphere; means for supporting and spacing said transmission line from said ground plane and said YIG sphere; and wherein the cross-section shape of said groove is round having a radius equal to the radius of said sphere.
Claim 10
Dependent Claim
89 words
Apparatus for enhancing the magnetic coupling between a transmission line and YIG sphere comprising: a ground plane having a groove; said YIG sphere positioned in said groove of said ground plane to provide magnetic coupling between said ground plane and said sphere; said transmission line positioned over said ground plane and YIG sphere; means for supporting and spacing said transmission line from said ground plane and said YIG sphere; and wherein the cross-section shape of said groove is round having a radius equal to the radius of said sphere.
Claim 11
Dependent Claim
83 words
Apparatus for enhancing the magnetic coupling between a transmission line and YIG sphere comprising: a ground plane having a groove wherein the depth of said groove exceeds the radius of said YIG sphere; said YIG sphere positioned in said groove of said ground plane to provide magnetic coupling between said ground plane and said sphere; said transmission line positioned over said ground plane and YIG sphere; and means for supporting and spacing said transmission line from said ground plane and said YIG sphere.
Claim 12
Dependent Claim
83 words
Apparatus for enhancing the magnetic coupling between a transmission line and YIG sphere comprising: a ground plane having a groove wherein the depth of said groove exceeds the radius of said YIG sphere; said YIG sphere positioned in said groove of said ground plane to provide magnetic coupling between said ground plane and said sphere; said transmission line positioned over said ground plane and YIG sphere; and means for supporting and spacing said transmission line from said ground plane and said YIG sphere.
Claim 13
Dependent Claim
138 words
Apparatus for enhancing the magnetic coupling between a transmission line and first and second YIG spheres comprising: first and second spaced apart ground planes each having a first surface facing one another and having a groove in each of said first surfaces positioned opposite one another and transverse to said transmission line; said first YIG sphere positioned in said groove of said first ground plane to provide magnetic coupling between said ground plane and said first sphere; said second YIG sphere positioned in said groove of said second ground plane to provide magnetic coupling between said ground plane and said second sphere; said transmission line positioned between said first and second ground planes and in between said first and second YIG spheres; and means for supporting and spacing said transmission line between said first and second ground planes.
Claim 14
Dependent Claim
138 words
Apparatus for enhancing the magnetic coupling between a transmission line and first and second YIG spheres comprising: first and second spaced apart ground planes each having a first surface facing one another and having a groove in each of said first surfaces positioned opposite one another and transverse to said transmission line; said first YIG sphere positioned in said groove of said first ground plane to provide magnetic coupling between said ground plane and said first sphere; said second YIG sphere positioned in said groove of said second ground plane to provide magnetic coupling between said ground plane and said second sphere; said transmission line positioned between said first and second ground planes and in between said first and second YIG spheres; and means for supporting and spacing said transmission line between said first and second ground planes.
Claim 15
Dependent Claim
14 words
The apparatus of claim 9 wherein said transmission line is a transmission line resonator.
Claim 16
Dependent Claim
13 words
The apparatus of claim 9 wherein said transmission line is a pseudo-radial resonator.
Claim 17
Dependent Claim
18 words
The apparatus of claim 9 including means for applying a static magnetic bias field to said YIG sphere.
Claim 18
Dependent Claim
138 words
Apparatus for enhancing the magnetic coupling between a transmission line and first and second YIG spheres comprising: first and second spaced apart ground planes each having a first surface facing one another and having a groove in each of said first surfaces positioned opposite one another and orthogonal to said transmission line; said first YIG sphere positioned in said groove of said first ground plane to provide magnetic coupling between said ground plane and said first sphere; said second YIG sphere positioned in said groove of said second ground plane to provide magnetic coupling between said ground plane and said second sphere; said transmission line positioned between said first and second ground planes and in between said first and second YIG spheres; and means for supporting and spacing said transmission line between said first and second ground planes.
Claim 19
Dependent Claim
138 words
Apparatus for enhancing the magnetic coupling between a transmission line and first and second YIG spheres comprising: first and second spaced apart ground planes each having a first surface facing one another and having a groove in each of said first surfaces positioned opposite one another and orthogonal to said transmission line; said first YIG sphere positioned in said groove of said first ground plane to provide magnetic coupling between said ground plane and said first sphere; said second YIG sphere positioned in said groove of said second ground plane to provide magnetic coupling between said ground plane and said second sphere; said transmission line positioned between said first and second ground planes and in between said first and second YIG spheres; and means for supporting and spacing said transmission line between said first and second ground planes.
Claim 20
Dependent Claim
147 words
Apparatus for enhancing the magnetic coupling between a transmission line and first and second YIG spheres comprising: first and second spaced apart ground planes each having a first surface facing one another and having a groove in each of said first surfaces positioned opposite one another; said first YIG sphere positioned in said groove of said first ground plane to provide magnetic coupling between said ground plane and said first sphere; said second YIG sphere positioned in said groove of said second ground plane to provide magnetic coupling between said ground plane and said second sphere; said transmission line positioned between said first and second ground planes and in between said first and second YIG spheres; means for supporting and spacing said transmission line between said first and second ground planes; and wherein the depth of said grooves exceeds the radius of said YIG spheres positioned therein.
Claim 21
Dependent Claim
147 words
Apparatus for enhancing the magnetic coupling between a transmission line and first and second YIG spheres comprising: first and second spaced apart ground planes each having a first surface facing one another and having a groove in each of said first surfaces positioned opposite one another; said first YIG sphere positioned in said groove of said first ground plane to provide magnetic coupling between said ground plane and said first sphere; said second YIG sphere positioned in said groove of said second ground plane to provide magnetic coupling between said ground plane and said second sphere; said transmission line positioned between said first and second ground planes and in between said first and second YIG spheres; means for supporting and spacing said transmission line between said first and second ground planes; and wherein the depth of said grooves exceeds the radius of said YIG spheres positioned therein.
Claim 22
Independent Claim
99 words
A method for enhancing the magnetic coupling between a transmission line having a conductor and ground plane and a YIG sphere comprising the steps of: forming a groove having a length greater than its width in said ground plane; positioning said YIG sphere in said groove and spaced from its ends to provide magnetic coupling between said ground plane and said YIG sphere and to minimize the effects of currents in the ground plane at the groove ends; and positioning said conductor over said ground plane transverse to said groove and over said YIG sphere at a predetermined spacing.
Claim 23
Independent Claim
99 words
A method for enhancing the magnetic coupling between a transmission line having a conductor and ground plane and a YIG sphere comprising the steps of: forming a groove having a length greater than its width in said ground plane; positioning said YIG sphere in said groove and spaced from its ends to provide magnetic coupling between said ground plane and said YIG sphere and to minimize the effects of currents in the ground plane at the groove ends; and positioning said conductor over said ground plane transverse to said groove and over said YIG sphere at a predetermined spacing.
Claim 24
Dependent Claim
23 words
The method of claim 15 wherein said step of forming a groove includes forming a groove with a circular cross-section at its bottom.
References Cited (Backward Citations)
US3740675A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-05-14 | 1982-11-13 | 1983-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-05-14 | 1986-11-13 | 1987-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-05-14 | 1990-11-13 | 1991-05-15 | $7700.00 | Window Closed / Lapsed |