Circuits, systems and methods for constructing a composite signal
View Patent ↗Circuits, systems, and methods for assembling a composite signal include a frequency translation circuit coupled to receive an input signal and operable to generate a plurality of frequency-translated versions of the input signal at a respective plurality of different frequencies, the plurality of frequency-translated input signals defining a group of frequency translated signals. The plurality of frequency translated signals may each be processed to provide a composite signal.
1. A translational switch operable with a system for constructing a composite signal, the translational switch comprising:
a plurality of inputs comprising any combination of Ka band, Ku band and Intermediate Frequency (IF) band inputs, each input configured to receive a respective one of a plurality of input signals from a set of satellites;
a first plurality of outputs;
a second plurality of outputs;
circuitry for switchably outputting, with one single frequency translation on any of the first plurality of outputs, a first frequency-translated version of a first of the plurality of input signals; and
circuitry for switchably outputting, with one single frequency translation on any of the second plurality of outputs,
a second frequency-translated version of the first of the plurality of input signals.
2. The translational switch of claim 1 , wherein the circuitry for switchably outputting, on any of the first plurality of outputs, a first frequency-translated version of the first of the plurality of input signals comprises:
a first mixer, comprising:
a first port coupled to receive the first of the plurality of input signals,
a second port coupled to receive a first mixing frequency signal, and
a third port for providing a first frequency-translated version of the first of the plurality of input signals; and
a second mixer, comprising:
a first port coupled to receive a second of the plurality of input signals,
a second port coupled to receive the first mixing frequency signal, and
a third port for providing a first frequency-translated version of the second of the plurality of input signals.
3. The translational switch of claim 2 , wherein the circuitry for switchably outputting, on any of the second plurality of outputs a second frequency-translated version of the first of the plurality of input signals, comprises:
a third mixer, comprising
a first port coupled to receive the first of the plurality of input signals,
a second port coupled to receive a second mixing frequency signal, and
a third port for providing a second frequency-translated version of the first of the plurality of input signals; and
a fourth mixer, comprising
a first port coupled to receive the second of the plurality of input signals,
a second port coupled to receive the second mixing frequency signal, and
a third port for providing a second frequency-translated version of the second of the plurality of input signals.
4. The translational switch of claim 3 ,
wherein the first frequency-translated versions of the first and second of the plurality of input signals comprise downconverted, upper band versions of the first and second of the plurality of input signals, and
wherein the second frequency-translated versions of the first and second of the plurality of input signals comprise downconverted, lower band versions of the first and second of the plurality of input signals.
5. The translational switch of claim 3 , wherein each of the first, second, third and fourth mixers are operable as downconverting mixers.
6. The translational switch of claim 3 , wherein each of the first and second mixing frequency signals are generated by an oscillator selected from the group consisting of a PLL-controlled oscillator, and a dielectric resonator oscillator.
7. The translational switch of claim 3 ,
wherein each of the first and second of the plurality of input signals comprises a Ku-band signals originating from the same satellite, and
wherein the first frequency-translated version of the first and second of the plurality of input signals, and the second frequency-translated version of the first and second of the plurality of input signals each comprises an L-band signal.
8. The translational switch of claim 1 , wherein the translational switch is monolithically formed on an integrated circuit.
9. The translational switch of claim 7 , wherein the oscillators are located externally from the translational switch.
10. A system for constructing a composite signal, comprising:
a first translational switch, comprising
a first plurality of inputs, comprising Ka band, Ku band and Intermediate Frequency (IF) band inputs, configured to receive a respective first plurality of signals from a set of satellites,
a first plurality of outputs, and
a second plurality of outputs;
wherein the first translational switch is configured to switchably output with one single frequency translation, on any of the first plurality of outputs, a first frequency-translated version a first of the first plurality of input signals, and
wherein the first translational switch is further configured to switchably output with one single frequency translation on any one of the second plurality of outputs a second frequency-translated version of the first of the plurality of input signals; and
a second translational switch, comprising
a second plurality of inputs, comprising Ka band, Ku band and IF band inputs, configured to receive a respective second plurality of signals from the set of satellites,
a third plurality of outputs, and
a fourth plurality of outputs,
wherein the second translational switch is configured to switchably output, with one single frequency translation, on the third plurality of outputs a first frequency-translated version of a first of the second plurality of input signals, and wherein the second translational switch is further configured to switchably output, with one single frequency translation, on the fourth plurality of outputs a second frequency-translated version of the first of the second plurality of input signals; and
an IF band output combining network coupled to each of the first translational switch outputs and to each of the second translational switch outputs, the IF band output combining network operable to construct a composite signal comprising the first frequency-translated version of the first of the first plurality of input signals and the first frequency-translated version of the first of the second plurality of input signals.
11. The system of claim 10 , wherein the combining network comprises:
a plurality of first stage summers, each first stage summer comprising one output and at least two inputs, wherein each first stage summer is operable to combine (i) the first frequency-translated version of the first of the first plurality of input signals with the first frequency-translated version of the first of the second plurality of input signals to provide a summed first frequency-translated signal, or (ii) the second frequency-translated version of the first of the first plurality of input signals with the second frequency-translated version of the first of the second plurality of input signals to provide a summed second frequency-translated signal; and
a plurality of second stage summers, each second stage summer comprising one output and at least two inputs, each input coupled to a respective first stage summer output, wherein each second stage summer is operable to combine a summed first frequency-translated signal with a summed second frequency-translated signal.
12. The system of claim 11 , wherein the combining network further comprises a filter coupled between at least one of the first stage summer outputs and one of the second stage summer inputs.
13. The system of claim 10 ,
wherein the first translation switch is configured to receive the first plurality of input signals from a first source;
wherein the second translation switch is configured to receive the second plurality of input signals from a second source; and
wherein the first translational switch is constructed on a first integrated circuit and wherein the second translational switch is constructed on a second integrated circuit which is separated from the first integrated circuit.
14. The system of claim 10 , wherein the first and second translational switches are each configured to downconvert each of the first of the first plurality of input signals and the first of the second plurality of input signals to a first frequency-translated version of the signal and a second frequency-translated version of the signal, whereby said first frequency-translated version of the signal comprises an upper band of the downconverted signal, and the second frequency-translated version of the signal comprises a lower band of the downconverted signal.
15. A translational switch operable with a system for constructing a composite signal, the translational switch, comprising:
a first input for receiving a first of a plurality of Ka band Ku band or IF band input signals from a set of satellites;
a second input for receiving a second of the plurality of Ka band Ku band or IF band input signals from the set of satellites;
a first mixer comprising:
a first port coupled to receive the first of the plurality of input signals a second port coupled to receive a first mixing frequency signal, and
a third port for providing a first frequency-translated version of the first of the plurality of input signals;
a second mixer comprising:
a first port coupled to receive the second of the plurality of input signals,
a second port coupled to receive the first mixing frequency signal, and
a third port for providing a first frequency-translated version of the second of the plurality of input signals;
a third mixer comprising:
a first port coupled to receive the first of the plurality of input signals,
a second port coupled to receive a second mixing frequency signal, and
a third port for providing a second frequency-translated version of the first of the plurality of input signals;
a fourth mixer comprising:
a first port coupled to receive the second of the plurality of input signals,
a second port coupled to receive the second mixing frequency signal, and
a third port for providing a second frequency-translated version of the second of the plurality of input signals;
a first switch coupled to receive each of the first frequency-translated versions of the first and the second of the plurality of input signals, the first switch operable to selectively couple either: (i) any one of the first frequency-translated versions of the first and second plurality of input signals, or (ii) a null output signal, to any one or more of a plurality of first switch outputs; and
a second switch coupled to receive each of the second frequency-translated versions of the first and the second of the plurality of input signals, the second output switch operable to selectively couple either: (i) any one of the second frequency-translated versions of the first and second plurality of input signals, or (ii) a null output signal, to any one or more of a plurality of second switch outputs,
wherein the first switch and the second switch are coupled to a plurality of combiners directly coupled to a tuner to create the composite signal, and only one stage of frequency translation is performed between the composite signal and the first and second plurality of input signals.