Multi-Frequency Power Amplifier With Nonlinear Signal Suppression
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Solution Overview
Problem
Existing power amplifiers exhibit low power amplification efficiency in dual-frequency or multi-frequency concurrent operating modes due to the generation of non-linear increment signals, which interfere with system performance and increase power consumption.
Innovation Solution
The power amplifier incorporates suppression circuits with capacitors and inductors to suppress non-linear increment signals, reducing envelope impedance and preventing the amplification of unwanted signals, thereby improving efficiency in dual-frequency or multi-frequency scenarios.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a power amplifier operates in dual-frequency or multi-frequency concurrent mode, then system capacity and communication capability are improved, but power amplification efficiency deteriorates due to generation of non-linear increment signals
Solution Approach 1:
The patent extracts and removes the harmful non-linear increment signals from the amplification process by introducing suppression circuits that specifically target and eliminate these unwanted frequency components, allowing the amplifier to maintain high efficiency in multi-frequency mode
Solution Approach 2:
The patent converts the harmful non-linear increment signals into a manageable problem by using suppression circuits that transform these unwanted signals into suppressed components, thereby converting energy that would be wasted into efficiently amplified desired signals
2Loss of energy
If suppression circuits are added to remove non-linear increment signals, then power amplification efficiency is improved, but device complexity increases
Solution Approach 1:
The patent applies suppression circuits with specific characteristics tailored to target only the non-linear increment signal frequencies, leaving the desired signal frequencies unaffected. This localized suppression approach improves efficiency without requiring complete system redesign
Solution Approach 2:
The patent changes the impedance parameters at specific frequency points by introducing suppression circuits that modify the output impedance characteristics, creating a low impedance path for non-linear increment signals while maintaining high impedance for desired signals, thereby improving amplification efficiency
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively suppresses non-linear increment signals, enhancing power amplification efficiency and reducing power consumption in dual-frequency or multi-frequency operations.
Implementation Method 1
the first inductor and the first capacitor are configured to perform short-circuit processing on an impedance at a frequency of the first non-linear increment signal. A series resonance is presented at the frequency of the first non-linear increment signal, which approximates to being short-circuited to the ground.
Data Source
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AI summary
A power amplifier is provided. The power amplifier includes: an input end (201), configured to input at least two signals with different frequencies; a power tube (220), configured to amplify the at least two signals input by the input end (210) and generate a first non-linear increment signal of the at least two signals; a first suppression circuit (230), configured to suppress the first non-linear increment signal; and an output end (240), configured to output the at least two signals amplified by the power tube, where the input end (201) is connected to the output end (240) through the power tube (220), and the power tube (220) is connected to the first suppression circuit (230). In this way, power amplification efficiency can be improved.