Active-Matched Distributed Power Amplifier for Broadband PAE
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Solution Overview
Problem
Current distributed power amplifiers face challenges in achieving sufficient output power and Power Added Efficiency (PAE) over a broad bandwidth, particularly in multioctave applications such as radar and multifunctional systems.
Innovation Solution
Incorporating an active matching circuit with a power splitter to divide the input signal into two paths, one to the input transmission line and the other to an active matching circuit, which enhances PAE performance and increases power output by successively coupling the input signal through amplifiers connected between the input and output transmission lines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a distributed power amplifier uses traditional transmission line configuration, then it achieves broadband operation, but it suffers from insufficient output power and low Power Added Efficiency (PAE)
Solution Approach 1:
The amplifier is divided into multiple identical stages, each contributing to the overall gain and output power. The segmentation allows the amplifier to achieve high output power through constructive combination of multiple stage outputs while maintaining broadband performance through distributed configuration.
Solution Approach 2:
The patent transitions from a single-dimensional transmission line approach to a two-dimensional configuration by adding multiple amplifier stages arranged in a distributed manner. This dimensional expansion enables simultaneous achievement of broadband operation, high output power, and improved PAE through the synergistic interaction of multiple stages.
2Power
If a distributed power amplifier uses more amplifier stages to increase output power, then power output improves, but device complexity increases
Solution Approach 1:
The amplifier is divided into multiple identical stages, each contributing to the overall gain and output power. The segmentation allows the amplifier to achieve high output power through constructive combination of multiple stage outputs while maintaining broadband performance through distributed configuration.
Solution Approach 2:
All amplifier stages are designed to be identical in structure and parameters, which simplifies the design process and reduces complexity. The homogeneous stages can be easily replicated and tuned, making the overall system less complex despite having multiple stages.
Data Source
AI summary
A distributed power amplifier arranged to operate over a bandwidth. An input side with an input terminal is arranged to receive an input signal and connected to an input transmission line. An output side with an output terminal is adapted to deliver an output signal and connected to an output transmission line. A power splitter is connected to the input terminal, thus being arranged to divide the input signal in a first path to the input transmission line and in a second path to an input of an active matching circuit. The active matching circuit has an output connected to the output transmission line. The other end of the output transmission line is connected to the output terminal. A method to design a distributed power amplifier and to modify existing distributed power amplifiers.