Linearizer for a power amplifier
First Claim
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1. A predistortion linearizer comprising;
- a signal separator for receiving a signal and for dividing the signal into a first signal and a second signal, a first path for carrying said first signal, a second path for carrying said second signal, a signal combiner for combining the signals from the first and second paths, and wherein said second path between said separator and combiner includes a non-linear device for receiving said second signal and generating distortion therefrom, and vector modulator means for controlling at least one of the amplitude and phase of the second signal.
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Abstract
A predistortion linearizer for a microwave power amplifier comprises a signal separator for receiving a signal and dividing the signal into first and second signals, a first path for carrying the first signal and a second path for carrying the second signal, and a signal combiner for combining the signals from the first and second paths. The second path between the separator and combiner includes a non-linear device for receiving the second signal and generating distortion therefrom, and a vector modulator for controlling at least one of the amplitude and phase of the second signal.
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Citations
31 Claims
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1. A predistortion linearizer comprising;
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a signal separator for receiving a signal and for dividing the signal into a first signal and a second signal, a first path for carrying said first signal, a second path for carrying said second signal, a signal combiner for combining the signals from the first and second paths, and wherein said second path between said separator and combiner includes a non-linear device for receiving said second signal and generating distortion therefrom, and vector modulator means for controlling at least one of the amplitude and phase of the second signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A predistortion linearizer for a microwave power amplifier comprising:
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a signal separator for receiving a signal and for dividing the signal into a first signal and a second signal, a first path for carrying said first signal, said first path comprising an amplifier and means for attenuating the input power of said first signal to said amplifier, a second path for carrying said second signal, said second path comprising a non-linear device for receiving said second signal and generating distortion therefrom and means for attenuating the power of the distorted signal from said non-linear device, a signal combiner for combining the signals from said amplifier and said non-linear device into a signal for feeding into a power amplifier, wherein one of said first and second paths is longer than the other to add a phase difference between the signals in the first and second paths. - View Dependent Claims (22, 23, 24, 25, 27, 28, 29, 30, 31)
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26. A vector modulator comprising a signal separator for dividing a signal into a first modulator signal and a second modulator signal, a first path for carrying said first modulator signal, a second path for carrying said second modulator signal and a signal combiner for combining the first and second modulator signals received from said first and second paths, wherein the first path includes means for changing the phase of the first modulator signal and means for controlling the amplitude of the first modulator signal, and the second path includes means for controlling the amplitude of the second modulator signal.
Specification