Excitation and use of guided surface waves
First Claim
Patent Images
1. A method, comprising:
- coupling a receiving structure to a lossy conducting medium, wherein the receiving structure comprises;
a charge terminal suspended at a height over a surface of the lossy conducting medium; and
a receiver network coupled between the charge terminal and the lossy conducting medium, the receiver network comprising a coil coupled to the lossy conducting medium and a supply line conductor coupled between the coil and the charge terminal; and
mode-matching with a guided surface wave established on the lossy conducting medium, wherein;
a traveling wave phase delay (Φ
) of the receiving structure is based upon a phase delay (θ
c) of the coil and a phase delay (θ
y) of the supply line conductor, and matched to a wave tilt angle (Ψ
) associated with the guided surface wave; and
the wave tilt angle (Ψ
) is based at least in part upon characteristics of the lossy conducting medium in a vicinity of the receiving structure.
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Accused Products
Abstract
Disclosed are various embodiments for transmitting and receiving energy conveyed in the form of a guided surface-waveguide mode along the surface of a lossy medium such as, e.g., a terrestrial medium excited by a guided surface waveguide probe.
105 Citations
32 Claims
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1. A method, comprising:
-
coupling a receiving structure to a lossy conducting medium, wherein the receiving structure comprises; a charge terminal suspended at a height over a surface of the lossy conducting medium; and a receiver network coupled between the charge terminal and the lossy conducting medium, the receiver network comprising a coil coupled to the lossy conducting medium and a supply line conductor coupled between the coil and the charge terminal; and mode-matching with a guided surface wave established on the lossy conducting medium, wherein; a traveling wave phase delay (Φ
) of the receiving structure is based upon a phase delay (θ
c) of the coil and a phase delay (θ
y) of the supply line conductor, and matched to a wave tilt angle (Ψ
) associated with the guided surface wave; andthe wave tilt angle (Ψ
) is based at least in part upon characteristics of the lossy conducting medium in a vicinity of the receiving structure. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A receiving structure for mode-matching with a guided surface wave established on a lossy conducting medium, the receiving structure comprising:
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a charge terminal elevated over the lossy conducting medium, wherein the charge terminal has a variable load impedance (ZL) determined based upon an image ground plane impedance (Zin) associated with the lossy conducting medium in a vicinity of the receiving structure and ZL is adjusted to resonate the receiving structure relative to an image plane at a complex depth below a surface of the lossy conducting medium; and a receiver network coupled between the charge terminal and the lossy conducting medium, the receiver network having a phase delay (Φ
) that matches a wave tilt angle (Ψ
) associated with the guided surface wave, the wave tilt angle (Ψ
) based at least in part upon characteristics of the lossy conducting medium in the vicinity of the receiving structure, wherein;resonating the receiving structure establishes a standing wave on the receiving structure based on phase delays from transmission line sections of the receiver network plus phase jumps arising from discontinuities in characteristic impedances of the transmission line sections. - View Dependent Claims (10, 11, 12, 13)
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14. A method, comprising:
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positioning a receive structure relative to a terrestrial medium, wherein the receive structure comprises; a charge terminal suspended at a height over a surface of the terrestrial medium; and a receiver network coupled between the charge terminal and the terrestrial medium, the receiver network comprising a coil coupled to the terrestrial medium and a supply line conductor coupled between the coil and the charge terminal; and receiving, via the receive structure, energy conveyed in a form of a guided surface wave on a surface of the terrestrial medium, wherein; a traveling wave phase delay (Φ
) of the receive structure is based upon a phase delay (θ
c) of the coil and a phase delay (74 y) of the supply line conductor, and matched to a wave tilt angle (Ψ
) associated with the guided surface wave; andthe wave tilt angle (Ψ
) is based at least in part upon characteristics of the terrestrial medium in a vicinity of the receiving structure. - View Dependent Claims (15, 16, 17, 18, 19)
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20. An apparatus, comprising:
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a receive structure that receives energy conveyed in a form of a guided surface wave along a surface of a terrestrial medium, the receive structure comprising; a charge terminal elevated over the terrestrial medium, wherein the charge terminal has a variable load impedance (ZL) determined based upon an image ground plane impedance (Zin) associated with the terrestrial medium in a vicinity of the receive structure and ZL is adjusted to resonate the receiving structure relative to an image plane at a complex depth below a surface of the terrestrial medium; and a receiver network coupled between the charge terminal and the terrestrial medium, the receiver network having a phase delay (Φ
) that matches a wave tilt angle (Ψ
) associated with the guided surface wave, the wave tilt angle (Ψ
) based at least in part upon characteristics of the terrestrial medium in the vicinity of the receive structure, wherein;resonating the receive structure establishes a standing wave on the receive structure based on phase delays from transmission line sections of the receiver network plus phase jumps arising from discontinuities in characteristic impedances of the transmission line sections. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27)
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28. A power transmission system, comprising:
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a guided surface waveguide probe that transmits electrical energy in a form of a guided surface wave along a surface of a terrestrial medium; and a receive structure that receives the electrical energy, the receive structure comprising; a charge terminal elevated over the terrestrial medium, wherein the charge terminal has a variable load impedance (ZL) determined based upon an image ground plane impedance (Zin) associated with the terrestrial medium in a vicinity of the receiving structure and ZL is adjusted to resonate the receiving structure relative to an image plane at a complex depth below a surface of the terrestrial medium; and a receiver network coupled between the charge terminal and the terrestrial medium, the receiver network having a phase delay (Φ
) that matches a wave tilt angle (Ψ
) associated with the guided surface wave, the wave tilt angle (Ψ
) based at least in part upon characteristics of the terrestrial medium in the vicinity of the receive structure, wherein;resonating the receive structure establishes a standing wave on the receive structure based on phase delays from transmission line sections of the receiver network plus phase jumps arising from discontinuities in characteristic impedances of the transmission line sections. - View Dependent Claims (29, 30, 31, 32)
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Specification