Reconfigurable Output Matching Circuit for Multi-Band Power Amplifiers
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current radio communication equipment requires multiple power amplifiers and output matching circuits for different frequency bands, leading to high costs, complex integration, and design challenges, especially in ensuring broadband characteristics for 50-ohm antenna signal transmission.
Innovation Solution
A broadband reconfigurable output stage matching circuit with impedance transformation and controllable switch elements, allowing for switching between high, medium, and low frequency bands, integrated with a power amplifier that includes preamplifier circuits, transformers, and switch elements to support wider frequency bands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If different groups of power amplifiers and output matching circuits are prepared for high frequency, medium frequency and low frequency, then the power amplifier system can support multiple frequency bands, but the cost increases, the number of components increases, and the integration difficulty increases
Solution Approach 1:
The patent implements a single power amplifier system that can operate across multiple frequency bands (high, medium, and low) by using reconfigurable output matching circuits. The output matching circuit includes switchable impedance transformation components that can be dynamically configured to match different frequency bands, allowing one amplifier to replace multiple frequency-specific amplifiers. This multi-functional design reduces the total number of components while maintaining broad frequency band support.
Solution Approach 2:
The patent employs dynamic reconfiguration of the output matching circuit using controllable switches that can change the circuit's impedance characteristics in real-time. The switching mechanism allows the same physical circuit to adapt its parameters dynamically according to the desired frequency band, enabling a single static hardware structure to perform multiple frequency-specific functions that would traditionally require separate fixed circuits for each band.
2Adaptability or versatility
If different groups of power amplifiers and output matching circuits are prepared for high frequency, medium frequency and low frequency, then the power amplifier system can support multiple frequency bands, but the design difficulty increases
Solution Approach 1:
The patent implements a single power amplifier system that can operate across multiple frequency bands (high, medium, and low) by using reconfigurable output matching circuits. The output matching circuit includes switchable impedance transformation components that can be dynamically configured to match different frequency bands, allowing one amplifier to replace multiple frequency-specific amplifiers. This multi-functional design reduces the total number of components while maintaining broad frequency band support.
Solution Approach 2:
The patent changes the electrical parameters (impedance values) of the output matching circuit by switching between different component configurations. By controlling the switches, the circuit's impedance transformation ratio and matching characteristics can be adjusted to suit different frequency bands, eliminating the need for separate fixed-parameter circuits for each band and simplifying the overall design process.
3Reliability
If broadband characteristics are ensured for 50-ohm antenna signal transmission, then the signal transmission quality is improved, but the output matching circuit complexity increases
Solution Approach 1:
The patent employs dynamic reconfiguration of the output matching circuit using controllable switches that can change the circuit's impedance characteristics in real-time. The switching mechanism allows the same physical circuit to adapt its parameters dynamically according to the desired frequency band, enabling a single static hardware structure to perform multiple frequency-specific functions that would traditionally require separate fixed circuits for each band.
Data Source
AI summary
Provided are an output matching circuit and a power amplifier comprised thereof. The output matching circuit comprises an impedance transformation component and a first matching component connected to the input end of the impedance transformation component to establish matching. The first matching circuit comprises an impedance element and a controllable switch element whose on/off is controlled by an external control signal to form different impedances. The output matching circuit realizes the reconstruction of the output stage matching circuit and the switching of the output operating frequency band. It can be used for high frequency/medium frequency/low frequency, which reduces the cost, the number of components, and the design difficulty, and is easy to be integrated. It can be used for multi-band multiplexing power amplifiers. The wide-band amplifier is realized, the number of components and material cost are reduced, and the system integration degree of the power amplifier is increased.