Patent US4028643A successfully refreshed from Google Patents.
US4028643A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Waveguide having strip dielectric structure
Assignee: University of Illinois Foundation
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Filing: 1976-05-12
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Granted: 1977-06-07
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Expires: 1996-05-12
Abstract
Abstract The invention is directed to a waveguide for microwave electromagnetic energy. A conductive ground plane has a first layer of dielectric material disposed on its surface. A second dielectric layer overlays the first dielectric layer. The second dielectric layer has a higher dielectric constant than the first dielectric layer. An elongated dielectric strip is formed on the second dielectric layer, the strip having a width which is substantially less than that of the second dielectric layer. The strip is formed of a material having a dielectric constant which is less than the dielectric constant of the material comprising the second dielectric layer. In operation, the wave energy propagates in the second dielectric layer which has the highest dielectric constant. The dielectric strip provides a lens effect in the transverse direction so most of the wave energy is carried below the strip.
Inventors
- 👤 Tatsuo Itoh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:01
CPC Classifications
H; H01; H01P; H01P5/00; H01P5/12; H01P5/16; H01P5/18; H01P5/188; H01P3/00; H01P3/16; H01P7/00; H01P7/10
Claims Analysis
Total Claims: 30
Claim 1
Independent Claim
92 words
A microwave waveguide, comprising: a conductive ground plane; a first dielectric layer disposed on a surface of said ground plane; a second dielectric layer overlaying said first dielectric layer, said second dielectric layer having a higher dielectric constant than said first dielectric layer; and an elongated dielectric strip formed on said second dielectric layer, said strip having a width which is substantially less than that of said second dielectric layer said strip being formed of material having a dielectric constant which is less than the dielectric constant of said second dielectric layer.
Claim 2
Dependent Claim
92 words
A microwave waveguide, comprising: a conductive ground plane; a first dielectric layer disposed on a surface of said ground plane; a second dielectric layer overlaying said first dielectric layer, said second dielectric layer having a higher dielectric constant than said first dielectric layer; and an elongated dielectric strip formed on said second dielectric layer, said strip having a width which is substantially less than that of said second dielectric layer said strip being formed of material having a dielectric constant which is less than the dielectric constant of said second dielectric layer.
Claim 3
Dependent Claim
30 words
The waveguide as defined by claim 1 wherein said second dielectric layer has a thickness which is of the order of a wavelength of electromagnetic energy to be carried therein.
Claim 4
Dependent Claim
26 words
The waveguide as defined by claim 2 wherein said first layer and said strip are formed of Teflon and said second layer is formed of quartz.
Claim 5
Dependent Claim
50 words
A microwave waveguide, comprising: a conductive ground plane; an elongated dielectric strip disposed on a surface of said ground plane; and a layer of dielectric material overlaying said strip and substantially overlapping the edges thereof, said dielectric layer having a higher dielectric constant than the dielectric constant of said strip.
Claim 6
Dependent Claim
50 words
A microwave waveguide, comprising: a conductive ground plane; an elongated dielectric strip disposed on a surface of said ground plane; and a layer of dielectric material overlaying said strip and substantially overlapping the edges thereof, said dielectric layer having a higher dielectric constant than the dielectric constant of said strip.
Claim 7
Dependent Claim
31 words
The waveguide as defined by claim 4 further comprising clamp means for engaging said ground plane and said layer of dielectric material so as to grip said elongated dielectric strip therebetween.
Claim 8
Dependent Claim
31 words
The waveguide as defined by claim 4 further comprising at least one additional dielectric strip disposed on said surface of said ground plane and overlayed by said layer of dielectric material.
Claim 9
Dependent Claim
30 words
The waveguide as defined by claim 6 further comprising clamp means for engaging said ground plane and said layer of dielectric material so as to grip said dielectric strips therebetween.
Claim 10
Dependent Claim
30 words
The waveguide as defined by claim 4 wherein the thickness of said layer of dielectric material is of the order of a wavelength of electromagnetic energy to be carried therein.
Claim 11
Dependent Claim
30 words
The waveguide as defined by claim 5 wherein the thickness of said layer of dielectric material is of the order of a wavelength of electromagnetic energy to be carried therein.
Claim 12
Dependent Claim
30 words
The waveguide as defined by claim 6 wherein the thickness of said layer of dielectric material is of the order of a wavelength of electromagnetic energy to be carried therein.
Claim 13
Dependent Claim
30 words
The waveguide as defined by claim 7 wherein the thickness of said layer of dielectric material is of the order of a wavelength of electromagnetic energy to be carried therein.
Claim 14
Dependent Claim
65 words
A microwave waveguide device, comprising: a conductive ground plane; first and second substantially perpendicular elongated dielectric strips disposed on a surface of said ground plane, said strips having a gap angularly across the intersection thereof; and a layer of dielectric material overlaying said strips and substantially overlapping the edges thereof, said dielectric layer having a higher dielectric constant than the dielectric constant of the strips.
Claim 15
Dependent Claim
65 words
A microwave waveguide device, comprising: a conductive ground plane; first and second substantially perpendicular elongated dielectric strips disposed on a surface of said ground plane, said strips having a gap angularly across the intersection thereof; and a layer of dielectric material overlaying said strips and substantially overlapping the edges thereof, said dielectric layer having a higher dielectric constant than the dielectric constant of the strips.
Claim 16
Dependent Claim
28 words
The device as defined by claim 12 further comprising clamp means for engaging said ground plane and said dielectric layer so as to grip said dielectric strips therebetween.
Claim 17
Dependent Claim
30 words
The device as defined by claim 12 wherein the thickness of said layer of dielectric material is of the order of a wavelength of electromagnetic energy to be carried therein.
Claim 18
Dependent Claim
30 words
The device as defined by claim 13 wherein the thickness of said layer of dielectric material is of the order of a wavelength of electromagnetic energy to be carried therein.
Claim 19
Dependent Claim
74 words
A microwave waveguide device, comprising: a conductive ground plane; first and second elongated dielectric strips having substantially parallel relatively closely spaced portions disposed on a surface of said ground plane, said strips diverging angularly from each other at an end of said parallel portions; and a layer of dielectric material overlaying said strips and substantially overlapping the edges thereof, said dielectric layer having a higher dielectric constant than the dielectric constant of said strips.
Claim 20
Dependent Claim
74 words
A microwave waveguide device, comprising: a conductive ground plane; first and second elongated dielectric strips having substantially parallel relatively closely spaced portions disposed on a surface of said ground plane, said strips diverging angularly from each other at an end of said parallel portions; and a layer of dielectric material overlaying said strips and substantially overlapping the edges thereof, said dielectric layer having a higher dielectric constant than the dielectric constant of said strips.
Claim 21
Dependent Claim
20 words
The device as defined by claim 16 wherein said strips also diverge at the other end of said parallel portions.
Claim 22
Dependent Claim
28 words
The device as defined by claim 17 further comprising clamp means for engaging said ground plane and said dielectric layer so as to grip said dielectric strips therebetween.
Claim 23
Dependent Claim
30 words
The device as defined by claim 17 wherein the thickness of said layer of dielectric material is of the order of a wavelength of electromagnetic energy to be carried therein.
Claim 24
Dependent Claim
30 words
The device as defined by claim 18 wherein the thickness of said layer of dielectric material is of the order of a wavelength of electromagnetic energy to be carried therein.
Claim 25
Dependent Claim
56 words
A microwave waveguide device, comprising: a conductive ground plane; a dielectric strip in the shape of a ring disposed on a surface of said ground plane; and a layer of dielectric material overlaying said strip and substantially overlapping the edges thereof, said dielectric layer having a higher dielectric constant than the dielectric constant of said strip.
Claim 26
Dependent Claim
56 words
A microwave waveguide device, comprising: a conductive ground plane; a dielectric strip in the shape of a ring disposed on a surface of said ground plane; and a layer of dielectric material overlaying said strip and substantially overlapping the edges thereof, said dielectric layer having a higher dielectric constant than the dielectric constant of said strip.
Claim 27
Dependent Claim
39 words
The device as defined by claim 21 further comprising at least a second dielectric strip disposed between said ground plane and said layer of dielectric material, one end of said strip being adjacent the periphery of said ring-shaped strip.
Claim 28
Dependent Claim
29 words
The device as defined by claim 22 further comprising clamp means for engaging said ground plane and said layer of dielectric material so as to grip said strips therebetween.
Claim 29
Dependent Claim
30 words
The device as defined by claim 22 wherein the thickness of said layer of dielectric material is of the order of a wavelength of electromagnetic energy to be carried therein.
Claim 30
Dependent Claim
30 words
The device as defined by claim 23 wherein the thickness of said layer of dielectric material is of the order of a wavelength of electromagnetic energy to be carried therein.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-06-06 | 1980-12-06 | 1981-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-06-06 | 1984-12-06 | 1985-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-06-06 | 1988-12-06 | 1989-06-07 | $7700.00 | Window Closed / Lapsed |