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US 2020/0007304 A1Published application
Enhanced linearity mixer
AssigneeKumu Networks, Inc.
InventorsWilhelm Steffen Hahn, Alfred Riddle, Ernie Landi
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Abstract
A system for enhanced linearity mixing includes an input-source signal coupler; a local oscillator (LO) signal coupler; a primary mixer that combines, via heterodyning, the primary-mixer-input signal and the primary-mixer-LO signal to generate a primary-mixer-output signal; a distortion-source mixer that combines, via heterodyning, the distortion-mixer-input signal and the distortion-mixer-LO signal to generate a distortion-mixer-output signal; and an output signal coupler that combines the primary-mixer-output signal and the distortion-mixer-output signal to generate an output signal with reduced non-linearity.
Claims22
A system for enhanced linearity mixing, comprising:
- an input coupler comprising:
- an input coupler input, a first coupler output, and a second coupler output;
- wherein the input coupler receives a first input signal at the input coupler input and splits the first input signal into a primary-mixer-input signal and a distortion-source-input signal;
- a primary frequency mixer comprising:
- a primary mixer signal input that receives the primary-mixer-input signal from the first coupler output;
- a primary mixer local oscillator (LO) input that receives a primary-mixer-LO signal defining a first frequency;
- and a primary mixer output that outputs a primary-mixer-output signal, the primary-mixer-output signal comprising a first-order primary-mixer-output signal component and a higher-order primary-mixer-output signal component, wherein:
- the primary frequency mixer generates the primary-mixer-output signal by heterodyning the primary-mixer-input signal with the primary-mixer-LO signal;
- and
- the primary-mixer-output signal defines a first signal power ratio of the higher-order primary-mixer-output signal component divided by the first-order primary-mixer-output signal component;
- a distortion-source frequency mixer comprising:
- a distortion-source mixer signal input that receives the distortion-source-mixer-input signal from the second coupler output;
- a distortion-source mixer LO input that receives a distortion-source-mixer-LO signal defining the first frequency;
- and a distortion-source mixer output that outputs a distortion-source-mixer-output signal, the distortion-source-mixer-output signal comprising a first-order distortion-source-mixer-output signal component and a higher-order distortion-source-mixer-output signal component, wherein:
- the distortion-source frequency mixer generates the distortion-source-mixer-output signal by heterodyning the distortion-source-mixer-input signal with the distortion-source-mixer-LO signal;
- the distortion-source-mixer-output signal defines a second signal power ratio of the higher-order distortion-source-mixer-output signal component divided by the first-order distortion-source-mixer-output signal component;
- and
- the second signal power ratio is greater than the first signal power ratio;
- and
- an output coupler comprising:
- a first coupler input that receives the primary-mixer-output signal from the primary mixer output;
- a second coupler input the receives the distortion-source-mixer-output signal from the distortion-source mixer output;
- and an output coupler output that outputs an output signal, the output signal comprising a first-order output signal component and a higher-order output signal component, wherein:
- the output coupler generates the output signal by combining the primary-mixer-output signal with the distortion-source-mixer-output signal;
- the output signal defines a third signal power ratio of the higher-order output signal component divided by the first-order output signal component;
- and
- the third signal power ratio is less than the first signal power ratio.
24 more elements
A system for enhanced linearity mixing, comprising:
- a radio frequency (RF) input coupler comprising:
- an RF coupler input, a first RF output, and a second RF output;
- a primary frequency mixer comprising:
- a primary mixer signal input coupled to the first RF output;
- a primary mixer local oscillator (LO) input;
- and
- a primary mixer intermediate frequency (IF) output;
- a distortion-source frequency mixer comprising:
- a distortion-source mixer signal input coupled to the second RF output;
- a distortion-source mixer LO input;
- and
- a distortion-source mixer IF output;
- and
- an IF coupler comprising:
- a first IF input coupled to the primary mixer IF output;
- a second IF input coupled to the distortion-source mixer IF output;
- and
- an IF coupler output.
15 more elements
Dependencies are inferred from the claim text.