Radiating waveguide and radio communication system using same
First Claim
1. A radiating waveguide comprisingan elongated waveguide having a transverse cross-section dimensioned to carry only the dominant mode at a selected operating frequency,one wall of said waveguide forming a continuous non-resonant longitudinal slot to produce a radiated field polarized perpendicularly to the slot,said slot extending substantially parallel to the axis of the waveguide and having a transverse dimension that is sufficiently narrow to substantially avoid the radiation of a field polarized parallel to the slot, said slot being dimensioned and located so that the amount of transverse currents intersected by the slot are sufficiently small to avoid significant radiation-attenuation of signals propagating longitudinally through the waveguide, andmeans for feeding the waveguide at one end thereof.
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Accused Products
Abstract
A radiating waveguide comprises an elongated waveguide with a transverse cross-section dimensioned to carry only the dominant mode at a selected operating frequency. One wall of the waveguide forms a continuous non-resonant longitudinal slot or equivalent thereof to produce a radiated field polarized perpendicularly to the slot. The slot extends substantially parallel to the axis of the waveguide and has a transverse dimension that is sufficiently narrow to substantially avoid the radiation of a field polarized parallel to the slot.
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Citations
39 Claims
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1. A radiating waveguide comprising
an elongated waveguide having a transverse cross-section dimensioned to carry only the dominant mode at a selected operating frequency, one wall of said waveguide forming a continuous non-resonant longitudinal slot to produce a radiated field polarized perpendicularly to the slot, said slot extending substantially parallel to the axis of the waveguide and having a transverse dimension that is sufficiently narrow to substantially avoid the radiation of a field polarized parallel to the slot, said slot being dimensioned and located so that the amount of transverse currents intersected by the slot are sufficiently small to avoid significant radiation-attenuation of signals propagating longitudinally through the waveguide, and means for feeding the waveguide at one end thereof.
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7. A radiating waveguide comprising
an elongated rectangular waveguide dimensioned to carry only the dominant mode at the operating frequency, a wide wall of said waveguide containing a continuous non-resonant longitudinal slot to produce a radiated field polarized perpendicularly to the slot, said slot extending parallel to the axis of the waveguide and having a narrow transverse dimension so that no significant axial currents are cut by the slot and thus no significant cross-polarized fields are generated, and said slot being dimensioned and located to intersect transverse currents in the waveguide wall so that signals propagating longitudinally through the waveguide are radiated laterally from the waveguide at an angle θ - from the waveguide'"'"'s axis with cos θ
=(v/c)-1 = 1-(fc /f)2 !-1/2, v being the phase velocity of the signal propagated through the waveguide, c being the speed of light, fc being the cutoff frequency of the waveguide and f the operating frequency, the amount of transverse currents intersected by the slot being sufficiently small to avoid significant radiation-attenuation of signals propagating longitudinally through the waveguide.
- from the waveguide'"'"'s axis with cos θ
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8. A method of communicating among a multiplicity of radio units selected from the group consisting of radio transmitters, receivers, or transceivers located within a prescribed area, said method comprising
locating an elongated waveguide within or adjacent to said prescribed area for transmitting radiated signals to, and receiving radiated signals from, said radio units along the length of the waveguide, the waveguide including at least one continuous longitudinal slot to produce a radiated field polarized perpendicularly to the axis of the waveguide, and having a near field encompassing the prescribed area containing the radio units, the dimensions and location of the slot in the waveguide being selected to produce a substantially flat amplitude response in the near field along the length of the waveguide, said slot being dimensioned and located so that the amount of transverse currents intersected by the slot are sufficiently small to avoid significant radiation-attenuation of signals propagating longitudinally through the waveguide.
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18. A method of communicating among a multiplicity of radio units selected from the group consisting of radio transmitters, receivers, or transceivers located within a prescribed area, said method comprising
locating an elongated waveguide within or adjacent to said prescribed area for transmitting radiated signals to, and receiving radiated signals from, said radio units along the length of the waveguide, the waveguide including at least one longitudinal slot to produce a radiated field polarized perpendicularly to the axis of the waveguide, and having a near field encompassing the prescribed area containing the radio units, the dimensions and location of the slot in the waveguide being selected to produce a near-field pattern having an amplitude that is substantially constant, at a given frequency, along the length of the waveguide, said slot being dimensioned and located so that the amount of transverse currents intersected by the slot are sufficiently small to avoid significant radiation-attenuation of signals propagating longitudinally through the waveguide.
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26. A digital communication system having the capability of two-way transmission of digital signals at high data rates with negligible bit error rates, said system comprising
a multiplicity of radio units selected from the group consisting of radio transmitters, receivers, or transceivers located within a prescribed area, an elongated waveguide located within or adjacent to said prescribed area for transmitting radiated signals to, and receiving radiated signals from, said radio units along the length of the waveguide, the waveguide including at least one continuous longitudinal slot to produce a radiated field polarized perpendicularly to the axis of the waveguide, and having a near field encompassing the prescribed area containing the radio units, the dimensions and location of the slot in the waveguide wall being selected to produce a substantially flat amplitude response in the near field along the length of the waveguide, said slot being dimensioned and located so that the amount of transverse currents intersected by the slot are sufficiently small to avoid significant radiation-attenuation of signals propagating longitudinally through the waveguide.
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33. A digital communication system having the capability of two-way transmission of digital signals at high data rates with negligible bit error rates, said system comprising
a multiplicity of radio units selected from the group consisting of radio transmitters, receivers, or transceivers located within a prescribed area, an elongated waveguide located within or adjacent to said prescribed area for transmitting radiated signals to, and receiving radiated signals from, said radio units along the length of the waveguide, the waveguide including at least one longitudinal slot to produce a radiated field polarized perpendicularly to the axis of the waveguide, and having a near field encompassing the prescribed area containing the radio units, the dimensions and location of the slot in the waveguide being selected to produce a near-field pattern having an amplitude that is substantially constant, at a given frequency, along the length of the waveguide, said slot being dimensioned and located so that the amount of transverse currents intersected by the slot are sufficiently small to avoid significant radiation-attenuation of signals propagating longitudinally through the waveguide.
Specification