Broadcast signal waveguide
AssigneeInvacom Ltd.
InventorGary Stafford
Life of this patent
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Abstract
A waveguide for use in apparatus for receiving transmitted data signals is provided. The waveguide includes first, second and third channels with the received data entering the first channel and components of the received data, signals being selectively deflected from the first channel into the second or third channels. The form of the components depends on whether the data signals have circular or linear polarity. The components leave the waveguide in substantially the same phase as which they entered the waveguide thereby allowing the same to be subsequently processed. The provision of the waveguide allows the receiving apparatus to be used to receive data signals with either circular and/or linear polarity and be subsequently processed.
Claims20
A waveguide apparatus for use with received data, said waveguide apparatus including an inlet into a first channel into which received signals pass, said received signals including two orthogonal components of at least one polarization, said first channel having located therein a first deflection means which causes at least a first component of said polarization to be deflected to leave said first channel through a first aperture in the first channel into a second channel, and a second deflection means which causes at least a second component of said polarization to be deflected to leave said first channel through a second aperture in the first channel into a third channel, wherein said components are guided through said second and third channels to outlets in substantially the same phase wherein distances travelled by said first and second components of said polarization between entering the waveguide apparatus at the inlet and leaving the waveguide apparatus at said respective outlets are substantially the same.
An apparatus for receiving transmitted circular or linear polarity signals, said apparatus including a feedhorn or antenna to receive data, interfaced with a waveguide, said waveguide including an inlet into a first channel into which the received circular or linear polarity signals pass, said first channel having located therein a first deflection means which causes a first orthogonal component of said data to be deflected to leave said first channel through a first aperture in the first channel, and a second deflection means disposed downstream from the first deflection means which causes a second orthogonal component of said data to be deflected to pass through a second aperture, and wherein said first and second orthogonal components are guided towards respective outlets from said waveguide, and wherein the distances traveled by said first and second components between entering the inlet into the first channel and the respective outlets from the waveguide are substantially the same.
Dependencies are inferred from the claim text.