RF Power Amplifier Switching Between Parallel and Stacked Modes
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Solution Overview
Problem
Conventional RF power amplifiers face inefficiencies in both high and low output power applications, with stacked amplifiers being less effective for high output power and parallel structures consuming more current for low output power, while existing solutions require expensive components or introduce extra losses.
Innovation Solution
An RF power amplifier with a switching network that allows amplifiers to be configured in either a parallel or stacked structure based on output power demands, using a switch controller to adjust the configuration, thereby optimizing efficiency for both high and low output power levels with minimal components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If amplifiers are configured in parallel structure, then high output power is achieved, but current consumption increases and efficiency decreases for low output power applications
Solution Approach 1:
The patent implements dynamic reconfiguration of amplifier stages by switching between parallel and stacked configurations based on operating conditions. The system dynamically adjusts the amplifier topology to match demand, using switches to reconfigure connections between amplifier stages, thereby optimizing efficiency across different power levels
Solution Approach 2:
The patent divides the power amplifier into multiple independent amplifier stages that can be independently controlled and configured. By segmenting the amplifier into separate stages with individual control, the system can selectively activate and configure specific stages in parallel or stacked arrangements to match power requirements
2Use of energy by moving object
If amplifiers are configured in stacked structure, then efficiency is improved for low output power, but output power capability is reduced for high output power applications
Solution Approach 1:
The system dynamically switches between stacked and parallel configurations based on real-time power demands. When high efficiency is needed at low power, the stacked configuration is activated; when high output power is required, the system transitions to parallel configuration, ensuring optimal performance across the full power range
Solution Approach 2:
The same amplifier stages serve multiple functions by being capable of operating in both stacked and parallel configurations. The amplifier system is designed to be universal, handling both low-power efficient operation and high-power delivery using the same hardware components
3Power
If fixed parallel structure is used, then high output power is maintained, but efficiency is lost for low output power applications
Solution Approach 1:
The patent transforms the fixed parallel structure into a dynamic system that can adapt its configuration. Switching mechanisms enable the system to transition from parallel to stacked configuration when operating at low power levels, eliminating efficiency losses while maintaining high output power capability when needed
4Use of energy by moving object
If fixed stacked structure is used, then efficiency is improved for low output power, but high output power capability is reduced
Solution Approach 1:
The system dynamically reconfigures from a fixed stacked structure to allow parallel operation when high output power is required. The switching network enables transition between configurations, maintaining efficiency at low power while unlocking high power capability when demanded
Data Source
AI summary
Methods and apparatus for providing high efficiency power amplifiers for both high and low output power levels are disclosed. An example apparatus includes a first amplifier to amplify a signal from a host device; and transmit the amplified signal to an antenna; a second amplifier to amplify the signal from the host device; and transmit the amplified signal to the antenna; and first, second, and third switches to: when the first and second switches are closed and the third switch is open, couple the first amplifier to the second amplifier in a parallel structure; and when the first and second switches are open and the third switch is closed, couple the first amplifier to the second amplifier in a stacked structure.