Dielectric waveguide line
AssigneeDaikin Industries, Ltd.
InventorsHiroyuki Yoshimoto, Katsusada Tokuhira, Taku Yamanaka
Life of this patent
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Abstract
A dielectric waveguide including: a center dielectric A1; a dielectric layer A2 surrounding the center dielectric A1; and a dielectric layer A3 surrounding the dielectric layer A2, the center dielectric A1 including polytetrafluoroethylene, the center dielectric A1, the dielectric layer A2, and the dielectric layer A3 having relative permittivities at 25° C. and 6 GHz represented by εA1, εA2, and εA3, respectively, εA1, εA2, and εA3 satisfying the following: εA1 is 2.20 or lower; εA2 is 1.90 or lower; εA3 is 1.55 or lower; and εA1>εA2>εA3 is satisfied.
Claims5
A dielectric waveguide comprising:
- a center dielectric A1;
- a dielectric layer A2 surrounding the center dielectric A1;
- and
- a dielectric layer A3 surrounding the dielectric layer A2,
- the center dielectric A1 comprising polytetrafluoroethylene,
- the center dielectric A1, the dielectric layer A2, and the dielectric layer A3 having relative permittivities εA1, εA2, and εA3 at 25° C. and 6 GHz, respectively,
- εA1, εA2, and εA3 satisfying the following:
- εA1 is 2.20 or lower;
- εA2 is 1.90 or lower;
- εA3 is 1.55 or lower;
- and εA1>εA2>εA3 is satisfied,
- wherein a ratio εA2/εA1 of εA2 to εA1 is 0.65 to 0.95, and
- a ratio εA3/εA2 of εA3 to εA2 is 0.65 to 0.95,
- the specific gravity of the dielectric layer A2 is lower than the specific gravity of the center dielectric A1, and
- the specific gravity of the dielectric layer A3 is lower than the specific gravity of the dielectric layer A2.
A dielectric waveguide comprising:
- a dielectric B comprising polytetrafluoroethylene,
- the dielectric B being seamlessly and integrally formed of a single material and having a relative permittivity that continuously gradually decreases outwardly in a radial direction at 25° C. and 6 GHZ,
- wherein in the dielectric B, the relative permittivity decreasing rate is 0.005% or higher and 20% or lower, per millimeter outwardly in the radial direction.
Dependencies are inferred from the claim text.