Guided-wave transmission device with non-fundamental mode propagation and methods for use therewith
First Claim
1. An antenna system comprising:
- an antenna;
a transmission medium that facilitates wireless network connectivity via the antenna, wherein the transmission medium comprises a dielectric material having a largest cross sectional dimension;
a coupler that couples a first electromagnetic wave having a carrier frequency to the transmission medium, wherein the coupling of the first electromagnetic wave to the transmission medium results in a second electromagnetic wave that is guided to propagate along the dielectric material via at least one guided-wave mode that includes a non-fundamental mode, wherein the non-fundamental mode has a cutoff frequency, and wherein the carrier frequency is above the cutoff frequency and a majority of an electric field strength of the second electromagnetic wave is concentrated within a distance from the dielectric material that is less than the largest cross sectional dimension.
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Abstract
Aspects of the subject disclosure may include, for example, a transmission device that includes a transmitter that generates a first electromagnetic wave to convey data. A coupler couples the first electromagnetic wave to a single wire transmission medium having an outer surface, to forming a second electromagnetic wave that is guided to propagate along the outer surface of the single wire transmission medium via at least one guided wave mode that includes an asymmetric or non-fundamental mode having a lower cutoff frequency. A carrier frequency of the second electromagnetic wave is selected to be within a limited range of the lower cutoff frequency, so that a majority of the electric field is concentrated within a distance from the outer surface that is less than half the largest cross sectional dimension of the single wire transmission medium, and/or to reduce propagation loss. Other embodiments are disclosed.
2502 Citations
20 Claims
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1. An antenna system comprising:
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an antenna; a transmission medium that facilitates wireless network connectivity via the antenna, wherein the transmission medium comprises a dielectric material having a largest cross sectional dimension; a coupler that couples a first electromagnetic wave having a carrier frequency to the transmission medium, wherein the coupling of the first electromagnetic wave to the transmission medium results in a second electromagnetic wave that is guided to propagate along the dielectric material via at least one guided-wave mode that includes a non-fundamental mode, wherein the non-fundamental mode has a cutoff frequency, and wherein the carrier frequency is above the cutoff frequency and a majority of an electric field strength of the second electromagnetic wave is concentrated within a distance from the dielectric material that is less than the largest cross sectional dimension. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A transmission device comprising:
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means for generating a first electromagnetic wave based on a communication signal to convey data, the first electromagnetic wave having a carrier frequency; and means for coupling the first electromagnetic wave to a conductorless transmission medium that facilitates wireless network connectivity via an antenna, wherein the conductorless transmission medium comprises a dielectric material having a diameter, wherein the coupling of the first electromagnetic wave to the conductorless transmission medium results in a second electromagnetic wave that is guided to propagate along the conductorless transmission medium via at least one guided-wave mode that includes an asymmetric mode, wherein the carrier frequency is within a non-optical frequency band and wherein the asymmetric mode has a cutoff frequency, and wherein the carrier frequency is above the cutoff frequency and a majority of an electric field strength of the second electromagnetic wave is concentrated within a distance from the dielectric material that is less than the diameter. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A method comprising:
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generating a first electromagnetic wave based on a communication signal to convey data, the first electromagnetic wave having a carrier frequency; and coupling, by a coupler, the first electromagnetic wave to a dielectric transmission medium that provides network connectivity via an antenna that radiates free space wireless signals, wherein the dielectric transmission medium has a diameter, wherein the coupling of the first electromagnetic wave to the dielectric transmission medium results in a second electromagnetic wave that is guided to propagate along the dielectric transmission medium via a non-fundamental guided-wave mode, wherein the carrier frequency is within a non-optical frequency band and wherein the carrier frequency is above a cutoff frequency of the non-fundamental guided-wave mode and a majority of an electric field strength of the second electromagnetic wave is concentrated within a distance from the dielectric transmission medium that is less than the diameter. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification