Dielectric waveguide to TEM transmission line signal launcher
First Claim
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1. A signal launcher for coupling signals of predetermined wavelength between a dielectric waveguide and a TEM mode transmission line comprising:
- a conductive ground plane;
an elongated high permittivity dielectric waveguide of predetermined cross section mounted adjacent to the conductive ground plane;
a TEM mode transmission line halving an elongated conductive portion fixed adjacent to a portion of the dielectric waveguide such that the dielectric waveguide and the conductive portion form a distributed coupling region having a length of at least two times the predetermined wavelength; and
a film of low permittivity dielectric material disposed between the dielectric waveguide and the conductive portion in the coupling region.
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Abstract
Mode converting signal launchers for efficient coupling signals between dielectric insular and image waveguides and TEM mode transmission lines. The launcher includes a conductive ground plane and an elongated high permittivity dielectric waveguide adjacent to the ground plane. A TEM mode transmission line provides an elongated conductive strip fixed adjacent to the dielectric waveguide such that a coupling region is formed having a length of at least two times the wavelength in the dielectric waveguide.
274 Citations
21 Claims
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1. A signal launcher for coupling signals of predetermined wavelength between a dielectric waveguide and a TEM mode transmission line comprising:
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a conductive ground plane; an elongated high permittivity dielectric waveguide of predetermined cross section mounted adjacent to the conductive ground plane; a TEM mode transmission line halving an elongated conductive portion fixed adjacent to a portion of the dielectric waveguide such that the dielectric waveguide and the conductive portion form a distributed coupling region having a length of at least two times the predetermined wavelength; and a film of low permittivity dielectric material disposed between the dielectric waveguide and the conductive portion in the coupling region. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A signal launcher for coupling signals of predetermined nominal wavelength between a dielectric waveguide and a TEM transmission line, comprising:
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a conductive ground plane; a high permittivity dielectric waveguide portion having a front face and a back face mounted adjacent to the conductive ground plane; a conductive mode shield mounted at the front face of the waveguide portion covering a short portion of the outer surface of the waveguide portion including a conductive flange for coupling to the TEM transmission line; and a thin low permittivity film of dielectric material disposed between the conductive mode shield and the dielectric waveguide portion surface. - View Dependent Claims (13, 14, 15)
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16. A signal launcher for coupling signals of predetermined wavelength between a dielectric waveguide and a TEM mode transmission line comprising:
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a conductive group plane; an elongated high permittivity dielectric waveguide of predetermined cross section mounted adjacent to the conductive ground plate; a TEM mode transmission line having an elongated conductive portion fixed adjacent to a portion of the dielectric waveguide such that the dielectric waveguide crosses over the conductive portion at a predetermined angle to form a distributed coupling region having a length of at least two times the predetermined wavelength; and a thin low permittivity film of synthetic organic resin disposed between and secured to both said conductive ground plane and said dielectric waveguide. - View Dependent Claims (17, 18)
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19. A signal launcher for coupling signals of predetermined wavelength between a dielectric waveguide and a TEM mode transmission line comprising:
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a conductive ground plane; an elongated high permittivity dielectric waveguide of predetermined cross section mounted adjacent to the conductive ground plane; a TEM mode transmission line having an elongated conductive portion fixed adjacent to a portion of the dielectric waveguide such that the dielectric waveguide and the conductive portion form a distributed coupling region having a length of at least two times the predetermined wavelength wherein a thin film of low permittivity dielectric material is disposed between the dielectric waveguide and conductive portion in the coupling region and wherein the dielectric waveguide is fixed directly on top and in parallel with the conductive portion in the coupling region; and a thin low permittivity film of synthetic organic resin disposed between and secured to both said conductive ground plane and said dielectric waveguide.
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20. A signal launcher for coupling signals of predetermined wavelength between a dielectric waveguide and a TEM mode transmission lines comprising:
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a conductive ground plane; an elongated high permittivity dielectric waveguide of predetermined cross section mounted adjacent to the conductive ground plane; a TEM mode transmission line having an elongated conductive portion fixed adjacent to a portion of the dielectric waveguide such that the dielectric waveguide crosses over the conductive portion at a predetermined non-zero angle such that the conductive portion is between the dielectric waveguide and the ground plane to form a distributed coupling region having a length of at lest two times the predetermined wavelength. - View Dependent Claims (21)
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Specification