EXCITATION AND USE OF GUIDED SURFACE WAVES
First Claim
Patent Images
18. A guided surface waveguide probe, comprising:
- a charge terminal elevated over a lossy conducting medium; and
a feed network configured to couple an excitation source to the charge terminal, the feed network configured to provide a voltage to the charge terminal with a phase delay (Φ
) that matches a wave tilt angle (Ψ
) associated with a complex Brewster angle of incidence (θ
i,B) associated with the lossy conducting medium, and the charge terminal having a load impedance (ZL) that is determined based upon an image ground plane impedance (Zin) associated with the lossy conducting medium.
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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.
17 Citations
28 Claims
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18. A guided surface waveguide probe, comprising:
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a charge terminal elevated over a lossy conducting medium; and a feed network configured to couple an excitation source to the charge terminal, the feed network configured to provide a voltage to the charge terminal with a phase delay (Φ
) that matches a wave tilt angle (Ψ
) associated with a complex Brewster angle of incidence (θ
i,B) associated with the lossy conducting medium, and the charge terminal having a load impedance (ZL) that is determined based upon an image ground plane impedance (Zin) associated with the lossy conducting medium. - View Dependent Claims (1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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28. A method comprising:
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positioning a charge terminal of a guided surface waveguide probe at a defined height over a lossy conducting medium; adjusting a traveling wave phase delay (Φ
) of the guided surface waveguide probe to match a wave-tilt angle (Ψ
) of a surface wave of the lossy conducting medium;simultaneously exciting a superposed standing wave on the guided surface waveguide probe by exploiting phase delays from transmission line sections of the guided surface waveguide probe plus phase jumps arising from discontinuities in characteristic impedances of the transmission line sections, the superposed standing wave based upon a complex image plane located at a complex depth from a base of the guided surface waveguide probe; and exciting the charge terminal with an excitation voltage via the transmission line sections, where an excitation charge distribution establishes an electric field that couples into a guided surface-wave waveguide mode along a surface of the lossy conducting medium.
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Specification