SUB-SURFACE RADIO SURFACE WAVE LAUNCHER
First Claim
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1. A system for generating radio surface waves which are propagated along the surface of the earth where it interfaces with the atmosphere comprising:
- an antenna embedded in and beneath the surface of the earth and positioned to point the radiation pattern of said antenna in the direction of the critical angle, where said critical angle is the angle of incidence made by a ray from said antenna with the interface plane such that said ray is propagated tangentially to the interface region, and lens means formed in a circular configuration and having an aperture smaller than the wavelength in air of the propagated wave and fashioned of the material of said embedding medium and disposed on top of the surface of said medium over the region at which the maximum of the radiation pattern of said antenna is directed for directing said radiation tengentially to the surface of the earth.
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Abstract
A large increase in the signal strength of the surface wave transmitted from a buried or sub-surface antenna is achieved by shaping the interface region, at which the sub-surface wave is directed, into a cylindrical or spherical lens.
20 Citations
3 Claims
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1. A system for generating radio surface waves which are propagated along the surface of the earth where it interfaces with the atmosphere comprising:
- an antenna embedded in and beneath the surface of the earth and positioned to point the radiation pattern of said antenna in the direction of the critical angle, where said critical angle is the angle of incidence made by a ray from said antenna with the interface plane such that said ray is propagated tangentially to the interface region, and lens means formed in a circular configuration and having an aperture smaller than the wavelength in air of the propagated wave and fashioned of the material of said embedding medium and disposed on top of the surface of said medium over the region at which the maximum of the radiation pattern of said antenna is directed for directing said radiation tengentially to the surface of the earth.
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2. A system as recited in claim 1 wherein said lens means is a spherical lens.
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3. A system as recited in claim 1 wherein said lens means is a cylindrical lens means.
Specification
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Current AssigneeArthur F. Wickersham, Eugene H. Kopf
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Original AssigneeArthur F. Wickersham, Eugene H. Kopf
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InventorsKopf, Eugene H., Wickersham, Arthur F.
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Primary Examiner(s)Lieberman, Eli
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Application NumberUS05/307,956Time in Patent Office505 DaysField of Search343/719,753,911US Class Current343/719CPC Class CodesH01Q 1/04 Adaptation for subterranean...H01Q 19/09 wherein the primary active ...
