INTEGRATED MULTI-BEAM ANTENNA RECEIVING SYSTEM WITH IMPROVED SIGNAL DISTRIBUTION
An integrated multi-beam antenna receiving system controls signal flow to a set of frequency translation devices in order to provide the required signals requested by Integrated Receiver Decoder units (IRDs, or set-top-boxes) within the home. The receiving system is compatible with legacy IRDs, or can support delivery of the requested signals in digital format allowing single coaxial cable or twisted pair delivery into the home. The system supports satellite reception from a mixed constellation of Direct Broadcast Satellites (DBS) and Fixed Satellite Service platforms operating in multiple frequency bands.
1 . An integrated multibeam antenna receiving system capable of receiving signals from a plurality of satellites and serving a plurality of Integrated Receiver-Decoder (IRDs), comprising:
a plurality feed elements, each capable of receiving signals from one of the satellites;
an RF switch comprising a plurality of inputs coupled to the plurality of feed elements, and a plurality of outputs of total number equal to the number of the plurality of IRDs, each input of the switch representing a possible feed selection, and the outputs representing selected transponder outputs requested by the IRDs; and,
a low noise block (LNB) assembly receiving signals from the RF switch and providing IF signals in the desired frequency ranges.
2 . The antenna receiving system of claim 1 , further comprising a plurality of low noise RF amplifiers interposed between the plurality of feed elements and the RF switch and each having an input coupled to a corresponding one of the feed elements.
3 . The antenna receiving system of claim 2 , further comprising a plurality of filters interposed between the plurality of low noise RF amplifiers and the RF switch.
4 . The antenna receiving system of claim 3 , wherein each of the filters comprises an input coupled to an output of a corresponding one of the RF amplifiers.
5 . The antenna receiving system of claim 2 , further comprising a plurality of polarization processing modules interposed between the plurality of low noise RF amplifiers and the RF switch.
6 . The antenna receiving system of claim 5 , further comprising a plurality of filters, wherein each of the filters comprises an input coupled to an output of a corresponding polarization processing module.
7 . The antenna receiving system of claim 4 , further comprising a plurality of polarization processing modules interposed between the plurality of low noise RF amplifiers and the RF switch.
8 . The antenna receiving system of claim 4 , further comprising a plurality of polarization processing modules, each comprising inputs coupled to respective filters.
9 . The antenna receiving system of claim 1 , wherein the RF switch comprises a plurality of inputs of total number equal to twice the number of the plurality of feed elements.
10 . The antenna receiving system of claim 1 , further comprising an IF switch having inputs coupled to outputs of the RF switch.
11 . The antenna receiving system of claim 10 , further comprising a multiplexing assembly having inputs coupled to the IF switch and providing a single multiplexed output.
12 . The antenna receiving system of claim 5 , wherein at least one of the polarization processing modules comprises a variable polarization rotation module.
13 . The antenna receiving system of claim 7 , wherein at least one of the polarization processing modules comprises a variable polarization rotation module.
14 . The antenna receiving system of claim 1 , wherein the RF switch comprises a non-blocking RF switch.
15 . The antenna receiving system of claim 5 , wherein at least one of the feed elements comprises a circularly polarized feed element.
16 . The antenna receiving system of claim 15 , wherein at least one of the feed elements comprises a linearly polarized feed element.
17 . The antenna receiving system of claim 5 , wherein at least one of the feed elements comprises a dual polarized feed element.