Variable Splitter Power Amplifier for PAPR-Adaptive Amplification
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Solution Overview
Problem
Power amplification circuits face challenges in achieving appropriate amplification of input signals with varying power levels and frequencies, as existing solutions struggle to adapt efficiently based on the peak to average power ratio (PAPR) of the input signal.
Innovation Solution
A power amplification circuit incorporating a splitter with variable inductance and capacitance elements to split the input signal into different power levels, paired with a carrier amplifier and a peaking amplifier, and a combiner to combine the amplified signals, allowing for efficient power amplification based on the PAPR of the input signal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed split ratio is used in the splitter, then the circuit configuration is simple, but appropriate amplification cannot be achieved for input signals with varying power levels and frequencies
Solution Approach 1:
The splitter incorporates variable inductance elements and variable capacitance elements that can dynamically adjust their impedance values based on the input signal conditions (PAPR, power level, frequency). This dynamic adjustment enables the splitter to adapt the power split ratio in real-time, resolving the contradiction between maintaining circuit simplicity and achieving adaptability to varying signal conditions.
Solution Approach 2:
The invention changes the electrical parameters (inductance and capacitance values) of the splitter components to adapt to different input signal conditions. By varying these parameters based on PAPR and frequency, the splitter can optimize the power distribution to carrier and peaking amplifiers, achieving appropriate amplification without requiring completely different circuit configurations.
2Power
If the peaking amplifier is always on, then high power output is maintained, but efficiency decreases at low power levels
Solution Approach 1:
The peaking amplifier is configured with dynamic control based on the power level of the input signal. At low power levels, the peaking amplifier remains off while the carrier amplifier handles the signal, maintaining high efficiency. When the power level exceeds a threshold, the peaking amplifier is activated to provide the additional power capability. This dynamic on/off control resolves the contradiction between maintaining high power output capability and preserving efficiency at low power levels.
3Reliability
If amplification is performed without considering PAPR, then the circuit operation is simple, but appropriate amplification for different signal conditions cannot be achieved
Solution Approach 1:
The invention implements feedback mechanisms that monitor the input signal characteristics (PAPR, power level) and use this information to control the splitter's impedance and the peaking amplifier's operation. The variable inductance and capacitance elements are controlled based on feedback about the signal conditions, enabling the system to automatically adjust its behavior to achieve appropriate amplification while maintaining reasonable operational complexity.
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 enables power amplification that is appropriate for the condition of the input signal, optimizing efficiency and output power by dynamically adjusting the power split ratio and operational modes in response to changes in PAPR.
Implementation Method 1
a splitter that includes at least one variable inductance element and at least one variable capacitance element and that is configured to split a first signal into a second signal having a first power level and a third signal having a second power level based on a value of capacitance of each of the at least one variable capacitance element and a value of inductance of each of the at least one variable inductance element
Data Source
AI summary
A power amplification circuit performs power amplification appropriate for the condition of an input signal. The power amplification circuit includes a splitter that includes a variable inductance element and a variable capacitance element and that splits a signal into a signal having a first power level and a signal having a second power level based on a value of inductance of the variable inductance element and a value of capacitance of the variable capacitance element. A carrier amplifier is connected to the splitter and amplifies the signal and output a signal. A peaking amplifier is connected to the splitter and outputs a signal when the second power level is greater than or equal to a predetermined power level, and a combiner (combines the two signals from the respective amplifiers.