Directly emitting dielectric transmission line
First Claim
1. 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, andsaid cladding having a decreasing dielectric constant proceeding axially toward said one end portion.
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Accused Products
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.
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Citations
5 Claims
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1. A dielectric transmission line for transmitting electromagnetic waves into free space comprising:
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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. - View Dependent Claims (2, 3, 4, 5)
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Specification
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- Resources
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Current AssigneeJunkosha Company Limited
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Original AssigneeJunkosha Company Limited
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InventorsImaizumi, Haruo, Yasumoto, Hiromi, Suzuki, Hirosuke
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Primary Examiner(s)Sikes, William L.
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Assistant Examiner(s)Wimer, Michael C.
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Application NumberUS07/129,241Time in Patent Office505 DaysField of Search343/785, 343/753, 343/772, 343/755, 343/786, 343/905, 333/237, 333/236, 333/239, 333/240, 333/242US Class Current343/785CPC Class CodesH01P 3/16 Dielectric waveguides, i.e....H01Q 13/24 constituted by a dielectric...H01Q 19/15 the primary radiating sourc...H01Q 19/19 comprising one main concave...
