Directly emitting dielectric transmission line
AssigneeJunkosha Inc.
InventorsHirosuke Suzuki, Hiromi Yasumoto, Haruo Imaizumi
Life of this patent
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Abstract
Means are provided for radiating electromagnetic waves from a receiving end zone of a dielectric line for transmitting electromagnetic waves without the need for a metal horn antenna or a metal waveguide, and matching problems are thereby substantially avoided. Said means are provided by shaping the end of the line to specified contours, by varying the dielectric constant of the material of the line in a gradient longitudinally near the end zone of the line, and by arranging a reflecting mirror or lens to receive the waves emitted from the line. This waveguide is useful in wireless communications, radar transmission and similar applications.
Claims5
A dielectric transmission line for transmitting electromagnetic waves into free space comprising:
- a core of expanded, porous polytetrafluoroethylene,
- said core having a non-metallic cladding thereover,
- one end portion of said transmission line configured to emit electromagnetic waves directly into free space,
- said core having a decreasing dielectric constant proceeding axially toward said one end portion, and
- said cladding having a decreasing dielectric constant proceeding axially toward said one end portion.
Dependencies are inferred from the claim text.