Parallel Power Amplifier Module With Phase Correction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Power amplifiers in multi-mode multi-band mobile communication terminals often experience phase differences due to environmental variations, leading to oscillations when operating in parallel.
Innovation Solution
A power amplification module with two power amplifiers that can be selectively connected in parallel, featuring a phase correction circuit to eliminate phase differences between their output signals, ensuring stable operation across various communication systems and frequency bands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple power amplifiers are connected in parallel to support multi-mode multi-band communication, then the communication system's versatility is improved, but phase differences between output signals cause oscillations
Solution Approach 1:
A phase correction circuit is introduced as an intermediary component between the power amplifiers and the output. This circuit actively compensates for phase differences by adjusting the phase of each amplifier's output signal, thereby eliminating oscillations while maintaining the ability to support multiple communication systems and frequency bands
2Power
If power amplifiers operate in parallel to increase transmission power, then the power output is improved, but phase differences due to environmental factors cause oscillations
Solution Approach 1:
The phase correction circuit employs feedback mechanisms to continuously monitor and adjust the phase of output signals from parallel power amplifiers. By detecting phase differences caused by environmental variations such as temperature changes and load variations, the circuit dynamically compensates to maintain signal stability while preserving high transmission power capability
Data Source
AI summary
Provided is a power amplification module that supports a plurality of communication systems. The power amplification module includes: two power amplifiers that can be selectively connected in parallel with each other; a switch that, in accordance with one communication system selected from among the plurality of communication systems, selects one power amplifier that is to operate by itself from among the two power amplifiers or selects the two power amplifiers and connects the two power amplifiers in parallel with each other; and a phase correction circuit that, when the two power amplifiers are both selected, corrects a phase difference by being selectively connected between the outputs of the two selected power amplifiers such that a phase difference is not generated between the output signals of the two selected power amplifiers.