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US3903488A Expired / Lapsed US ⏱️ 0.0 years remaining

Planar dielectric waveguide and associated components for integrated circuits

Assignee: Raytheon Co
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Filing: 1974-06-10
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Granted: 1975-09-02
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Expires: 1994-06-10
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Abstract

Abstract A waveguide for sustaining the propagation of electromagnetic energy at frequencies corresponding to the millimeter wave range and through the optical frequency range, i.e. from 30 GHz up to about 106 GHz, and including a dielectric layer mounted atop and substantially coextensive with a ground plane. The waveguide includes at least one metal strip or other waveguiding metal pattern mounted atop the dielectric layer to thereby form a metal-dielectric-ground plane composite structure. The thickness of the dielectric layer is at least greater than 0.1 lambda 0, where lambda 0 is any wavelength within the above specified frequency range, whereby the waveguide structure will not support the TEM or quasi-TEM mode of propagation as characterized by a zero cut-off frequency.

Inventors

  • 👤 Timothy T Fong

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-23 04:41
CPC Classifications
H; H01; H01P; H01P3/00; H01P3/02; H01P3/08; H01P3/081; G; G02; G02B; G02B6/00; G02B6/10; G02B6/12; G02B6/122; G02B6/125

Claims Analysis

Total Claims: 11
Claim 1
Independent Claim 148 words
A waveguide structure for propagating electromagnetic energy at frequencies corresponding to millimeter waves, sub-millimeter waves and extending to the optical frequency range, including in combination: a. a ground plane, b. a layer of dielectric material mounted on said ground plane substantially coextensive therewith, c. at least one metallic strip member mounted on said dielectric layer for confining energy propagation in said dielectric layer to regions beneath said strip member; and d. the thickness of said dielectric layer being at least 0.1 lambda 0 where lambda 0 is a wavelength of electromagnetic energy within the above frequency range, whereby the magnitude of the dominant electric field polarizing vector Ey varies as a function of two dimensions of said dielectric layer, insuring that electromagnetic waves undergo strong reflections at the open ends of said dielectric layer and trapping substantial amounts of energy in said dielectric layer beneath said metal strip.
Claim 2
Dependent Claim 148 words
A waveguide structure for propagating electromagnetic energy at frequencies corresponding to millimeter waves, sub-millimeter waves and extending to the optical frequency range, including in combination: a. a ground plane, b. a layer of dielectric material mounted on said ground plane substantially coextensive therewith, c. at least one metallic strip member mounted on said dielectric layer for confining energy propagation in said dielectric layer to regions beneath said strip member; and d. the thickness of said dielectric layer being at least 0.1 lambda 0 where lambda 0 is a wavelength of electromagnetic energy within the above frequency range, whereby the magnitude of the dominant electric field polarizing vector Ey varies as a function of two dimensions of said dielectric layer, insuring that electromagnetic waves undergo strong reflections at the open ends of said dielectric layer and trapping substantial amounts of energy in said dielectric layer beneath said metal strip.
Claim 3
Dependent Claim 21 words
The structure defined in claim 1 wherein the thickness of said layer is between 0.1 lambda 0 and 1.0 lambda 0.
Claim 4
Dependent Claim 154 words
A waveguide structure for propagating electromagnetic energy at frequencies betwEen 30 GHz and 106 GHz including, in combination: a. a ground plane, b. a substantially planar layer of dielectric material mounted on said ground plane and substantially coextensive therewith, c. at least one metallic member mounted on said dielectric layer for confining energy propagation in said dielectric layer to regions beneath said metallic member, and d. said dielectric layer being of at least a thickness equal to 0.1 lambda 0, where lambda 0 is a wavelength of electromagnetic energy within the above frequency range, whereby relatively thick dielectric layers may be utilized in forming said waveguide without the requirement for machining and etching dielectric strips of a predetermined cross section, and the regions in which electromagnetic energy is propagated within said dielectric layer is controlled by the width of said metallic member and is independent of the cross sectional area of said dielectric layer.
Claim 5
Dependent Claim 154 words
A waveguide structure for propagating electromagnetic energy at frequencies betwEen 30 GHz and 106 GHz including, in combination: a. a ground plane, b. a substantially planar layer of dielectric material mounted on said ground plane and substantially coextensive therewith, c. at least one metallic member mounted on said dielectric layer for confining energy propagation in said dielectric layer to regions beneath said metallic member, and d. said dielectric layer being of at least a thickness equal to 0.1 lambda 0, where lambda 0 is a wavelength of electromagnetic energy within the above frequency range, whereby relatively thick dielectric layers may be utilized in forming said waveguide without the requirement for machining and etching dielectric strips of a predetermined cross section, and the regions in which electromagnetic energy is propagated within said dielectric layer is controlled by the width of said metallic member and is independent of the cross sectional area of said dielectric layer.
Claim 6
Dependent Claim 42 words
The structure defined in claim 3 wherein the thickness of said dielectric layer is between about 0.1 lambda 0 and 1.0 lambda 0, whereby the dominant electromagnetic field polarizing vector, Ey, varies as a function of two dimensions of said dielectric layer.
Claim 7
Dependent Claim 94 words
A waveguide structure for propagating electromagnetic energy at frequencies between 30 GHz and 106 GHz including, in combination: a. a ground plane, b. a substantially planar layer of dielectric material mounted on said ground plane and substantially coextensive therewith, c. at least one metallic member mounted on said dielectric layer for confining energy propagation in said dielectric layer to regions beneath said metallic member, and d. said dielectric layer being of at least a thickness equal to 0.1 lambda 0, where lambda 0 is a wavelength of electromagnetic energy within the above frequency range.
Claim 8
Dependent Claim 94 words
A waveguide structure for propagating electromagnetic energy at frequencies between 30 GHz and 106 GHz including, in combination: a. a ground plane, b. a substantially planar layer of dielectric material mounted on said ground plane and substantially coextensive therewith, c. at least one metallic member mounted on said dielectric layer for confining energy propagation in said dielectric layer to regions beneath said metallic member, and d. said dielectric layer being of at least a thickness equal to 0.1 lambda 0, where lambda 0 is a wavelength of electromagnetic energy within the above frequency range.
Claim 9
Dependent Claim 145 words
In a waveguide structure for propagating electromagnetic energy in a layer of dielectric material mounted on a ground plane and being substantially coextensive therewith, and further having at least one metallic strip mounted atop said dielectric layer for confining energy propagation in said dielectric layer to regions beneath said strip, the improvement comprising said dielectric layer having a thickness at least equal to 0.1 lambda 0 where lambda 0 is a wavelength of electromagnetic energy within a range of frequencies corresponding to the millimeter wave, submillimeter wave and extending to the optical frequency range, whereby the magnitude of the dominant electric field polarizing vector Ey varies as a function of two dimensions of said dielectric layer, insuring that electromagnetic waves undergo strong reflections at the open ends of said dielectric layer and trapping substantial amounts of energy in said dielectric layer beneath said metal strip.
Claim 10
Dependent Claim 145 words
In a waveguide structure for propagating electromagnetic energy in a layer of dielectric material mounted on a ground plane and being substantially coextensive therewith, and further having at least one metallic strip mounted atop said dielectric layer for confining energy propagation in said dielectric layer to regions beneath said strip, the improvement comprising said dielectric layer having a thickness at least equal to 0.1 lambda 0 where lambda 0 is a wavelength of electromagnetic energy within a range of frequencies corresponding to the millimeter wave, submillimeter wave and extending to the optical frequency range, whereby the magnitude of the dominant electric field polarizing vector Ey varies as a function of two dimensions of said dielectric layer, insuring that electromagnetic waves undergo strong reflections at the open ends of said dielectric layer and trapping substantial amounts of energy in said dielectric layer beneath said metal strip.
Claim 11
Dependent Claim 42 words
The structure defined in claim 6 wherein the thickness of said dielectric layer is between about 0.1 lambda 0 and 1.0 lambda 0, whereby the dominant electromagnetic field polarizing vector, Ey, varies as a function of two dimensions of said dielectric layer.

References Cited (Backward Citations)

US3563630A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1978-09-01 1979-03-03 1979-09-02 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1982-09-01 1983-03-03 1983-09-02 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1986-09-01 1987-03-03 1987-09-02 $7700.00 Window Closed / Lapsed

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