US4091343A
Expired / Lapsed
US
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Insular waveguide directional coupler
Assignee: Epsilon Lambda Electronics Corp
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Filing: 1976-11-08
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Granted: 1978-05-23
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Expires: 1996-11-08
Abstract
Abstract An insular waveguide directional coupler for use in the frequency range from about 1 GHz to about 1,000 GHz including a conductive image plane, a first length of elongated high permittivity dielectric waveguide of finite cross section adjacent to the conductive image plane, a second length of elongated high permittivity dielectric waveguide of finite cross section adjacent to the conductive image plane and spaced from the first length of waveguide to provide a coupling region therebetween, and a thin film of synthetic organic resin disposed between and secured to the conductive image plane and the lengths of waveguide, the thin film being low loss in character and having a low permittivity compared with that of the lengths of waveguide, the first length of waveguide having an inlet port at one end of the coupling region and spaced away from the second length of waveguide a distance substantially greater than the distance between the lengths of waveguide in the coupling region, the first and second lengths of waveguide having respectively first and second outlet ports at the other end of the coupling region and spaced from the other length of waveguide a distance substantially greater than the distance between the lengths of waveguide in the coupling region.
Inventors
- 👤 Robert M. Knox
- 👤 Peter P. Toulios
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:08
CPC Classifications
H; H04; H04B; H04B3/00; H04B3/52; H01; H01P; H01P1/00; H01P1/16; H01P3/00; H01P3/16; H01P5/00; H01P5/12; H01P5/16; H01P5/18; H01P5/188; H01P7/00; H01P7/10; H03; H03B; H03B9/00; H03B9/12; H03B9/14; H03B9/145; H03B9/146; H03B2009/126
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
304 words
An insular waveguide directional coupler for use in the frequency range from about 1 GHz to about 1,000 GHz comprising a conductive image plane, a first length of elongated high permittivity dielectric waveguide of finite cross section adjacent to said conductive image plane, a second length of elongated high permittivity dielectric waveguide of finite cross section adjacent to said conductive image plane and spaced from said first length of waveguide to provide a coupling region therebetween, and a thin film of synthetic organic resin disposed between and secured to said conductive image plane and said lengths of waveguide and extending laterally beyond the said lengths of waveguide and into said coupling region, said thin film being low loss in character and having a low permittivity compared with that of said lengths of waveguide, said first length of waveguide having an inlet port at one end of said coupling region and spaced away from said second length of waveguide a distance substantially greater than the distance between said lengths of waveguide in said coupling region, said first and second lengths of waveguide having respectively first and second outlet ports at the other end of said coupling region and spaced from the other length of waveguide a distance substantially greater than the distance between the lengths of waveguide in said coupling region, all of the energy injected into said inlet port being coupled from said first length of waveguide across said coupling region to said second length of waveguide and out said second outlet port when said coupling region has a length equivalent to an odd number of coupling lengths and all of the energy injected into said inlet port being transmitted through said coupling region to said first outlet port when saud coupling region has a length equivalent to an even number of coupling lengths.
Claim 2
Dependent Claim
304 words
An insular waveguide directional coupler for use in the frequency range from about 1 GHz to about 1,000 GHz comprising a conductive image plane, a first length of elongated high permittivity dielectric waveguide of finite cross section adjacent to said conductive image plane, a second length of elongated high permittivity dielectric waveguide of finite cross section adjacent to said conductive image plane and spaced from said first length of waveguide to provide a coupling region therebetween, and a thin film of synthetic organic resin disposed between and secured to said conductive image plane and said lengths of waveguide and extending laterally beyond the said lengths of waveguide and into said coupling region, said thin film being low loss in character and having a low permittivity compared with that of said lengths of waveguide, said first length of waveguide having an inlet port at one end of said coupling region and spaced away from said second length of waveguide a distance substantially greater than the distance between said lengths of waveguide in said coupling region, said first and second lengths of waveguide having respectively first and second outlet ports at the other end of said coupling region and spaced from the other length of waveguide a distance substantially greater than the distance between the lengths of waveguide in said coupling region, all of the energy injected into said inlet port being coupled from said first length of waveguide across said coupling region to said second length of waveguide and out said second outlet port when said coupling region has a length equivalent to an odd number of coupling lengths and all of the energy injected into said inlet port being transmitted through said coupling region to said first outlet port when saud coupling region has a length equivalent to an even number of coupling lengths.
Claim 3
Dependent Claim
27 words
The insular waveguide directional coupler set forth in claim 1, wherein the portions of said lengths of waveguide in said coupling region are parallel to each other.
Claim 4
Dependent Claim
48 words
The insular directional coupler set forth in claim 1, wherein said coupling length is the minimum length of said first and second lengths of waveguide over which the energy injected into said inlet port shifts completely from said first length of waveguide to said second length of waveguide.
Claim 5
Dependent Claim
56 words
The insular waveguide directional coupler set forth in claim 1, wherein the spacing between said lengths of dielectric waveguide in said coupling region is constant, and the ratio between said spacing and the square root of the cross-sectional area of said length of dielectric waveguide is in the range of from about 0.1 to about 0.8.
Claim 6
Dependent Claim
87 words
The insular directional coupler set forth in claim 1, wherein the lengths of dielectric waveguide in said coupling region are rectangular in cross section, the ratio between the thickness of said thin film and the thickness of said lengths of dielectric waveguide in said coupling region is in the range from about 0.02 to about 1.0, the ratio between the spacing of said lengths of waveguide in said coupling region and the width of said dielectric waveguides is in the range from about 0.1 to about 0.8.
Claim 7
Dependent Claim
60 words
The insular waveguide directional coupler set forth in claim 1, wherein said inlet port is coupled to said first length of waveguide at said one end of said coupling region by a curved section of waveguide extending away from said second length of waveguide and having a radius of curvature long enough to prevent radiation from said curved waveguide section.
Claim 8
Dependent Claim
63 words
The directional coupler set forth in claim 1, wherein said first and second outlet ports are coupled respectively to said first and second lengths of waveguide at the other end of said coupling region by curved waveguide sections extending away from the other lengths of waveguide and each having a radius of curvature long enough to prevent radiation from said curved waveguide sections.
References Cited (Backward Citations)
US3896402A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-05-22 | 1981-11-21 | 1982-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-22 | 1985-11-21 | 1986-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-22 | 1989-11-21 | 1990-05-23 | $7700.00 | Window Closed / Lapsed |