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US 9,882,397 B2Granted
Guided surface wave transmission of multiple frequencies in a lossy media
AssigneeCPG Technologies, LLC
InventorsJames F. Corum, Kenneth L. Corum, James D. Lilly, Basil F. Pinzone, Jr., Joseph F. Pinzone
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Abstract
Disclosed are various embodiments for transmitting energy at multiple frequencies via a guided surface wave along the surface of a lossy medium such as, e.g., a terrestrial medium by exciting a guided surface waveguide probe.
Claims20
A system, comprising:
- a guided surface waveguide probe;
- a plurality of power sources coupled to the guided surface waveguide probe, individual power sources of the plurality of power sources configured to excite the guided surface waveguide probe at a respective different frequency;
- the guided surface waveguide probe being adjusted to launch a plurality of guided surface waves along a lossy conducting medium, the plurality of guided surface waves comprising guided surface waves at the respective different frequencies of the individual power sources;
- and
- a feed network electrically coupled to a charge terminal of the guided surface waveguide probe, wherein for each guided surface wave, the feed network is configured to provide a respective phase delay (Φ) that matches a respective wave tilt angle (Ψ) associated with a respective complex Brewster angle of incidence (θi,B) associated with the lossy conducting medium in the vicinity of the guided surface waveguide probe.
2 more elements
A system, comprising:
- a guided surface waveguide probe comprising:
- a charge terminal elevated over a lossy conducting medium;
- a compensation terminal positioned below the charge terminal;
- first and second feed networks coupled to the charge terminal and the compensation terminal and configured to provide a voltage to the charge terminal;
- a first power source coupled to the charge terminal via the first feed network, the first power source exciting the charge terminal at a first frequency;
- and
- a second power source coupled to the charge terminal via the second feed network, the second power source exciting the charge terminal at a second frequency different from the first frequency;
- wherein the guided surface waveguide probe is adjusted to simultaneously launch a first guided surface wave at the first frequency along a lossy conducting medium and a second guided surface wave at the second frequency along the lossy conducting medium;
- and
- wherein the guided surface wave guide probe generates:
- a first resultant field having a first complex angle of incidence at least at a first Hankel crossover distance from the guided surface waveguide probe, the first Hankel crossover distance based at least in part on the first frequency, and
- a second resultant field having a second complex angle of incidence at least at a second Hankel crossover distance from the guided surface waveguide probe, the second Hankel crossover distance based at least in part on the second frequency.
9 more elements
A method, comprising:
- exciting a guided surface waveguide probe with a plurality of signals having different respective frequencies, the guided surface waveguide probe positioned over a lossy medium;
- launching a plurality of guided surface waves at the different respective frequencies in the lossy medium, each of the plurality of guided surface waves having a respective field strength contour that decays exponentially as a function of a distance from the guided surface waveguide probe;
- and
- wherein exciting the guided surface waveguide probe generates a plurality of resultant fields having a complex angle of incidence at least at a respective Hankel crossover distance from the guided surface waveguide probe, each of the plurality of resultant fields corresponding to a respective one of the plurality of signals.
1 more element
Dependencies are inferred from the claim text.