Solid State Power Amplifier System for High-Power Microwave Generation
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Solution Overview
Problem
Existing power amplifier systems, particularly those using magnetrons or vacuum tubes, are fragile and have limited lifespan, and there is a need for a more reliable and efficient solution for generating high-power microwave signals in the 2.0GHz to 3.0GHz frequency range.
Innovation Solution
A solid-state power amplifier system comprising a first power amplifier unit, a power splitter unit, a second power amplifier unit with multiple amplifiers configured in parallel, isolator units, and a power combiner unit, which splits and combines power signals to achieve a unified output of up to 1kW with high efficiency and frequency stability between 2.4GHz and 2.5GHz.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If magnetron or vacuum tubes are used to achieve high power output, then power amplification is improved, but reliability and lifespan deteriorate due to fragility
Solution Approach 1:
The patent divides the power amplifier into multiple solid-state amplifier modules (first power amplifier module, second power amplifier module, third power amplifier module) that process signals in stages. Each module handles a portion of the power amplification task, avoiding the need for a single high-power vacuum tube while achieving cumulative power output through parallel combination of multiple lower-power solid-state devices.
2Reliability
If solid state devices are used to improve reliability, then device lifespan is improved, but power output capability deteriorates compared to vacuum tube systems
Solution Approach 1:
The patent combines multiple solid-state power amplifier modules in a parallel configuration where their outputs are summed by a power combiner. The first, second, and third power amplifier modules each contribute to the total output power, which is then combined to achieve high power levels (e.g., 1kW or more) that would be difficult to obtain from a single solid-state device while maintaining the reliability advantages of solid-state technology.
3Power
If power is split and combined through multiple stages to achieve high output, then power output is improved, but signal phase stability deteriorates
Solution Approach 1:
The patent introduces phase control circuits and synchronization mechanisms as intermediary elements between the parallel power amplifier modules. These intermediaries monitor and adjust the phase of each module's output signal to ensure they are properly aligned before combination, compensating for phase shifts that occur during signal splitting and processing to maintain overall phase stability.
4Power
If multiple power amplifier modules are used in parallel to increase power output, then power capability is improved, but system complexity increases
Solution Approach 1:
The patent designs the power amplifier modules to be substantially identical in structure and function, with each module capable of performing the complete signal amplification process. This modular universality allows the system to scale power output simply by adding or removing identical modules rather than designing increasingly complex custom circuits, reducing overall system complexity while maintaining high power capability.
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AI summary
A microwave generator and power amplifier system (100) for the same are provided. The power amplifier system (100) can include a first power amplifier unit (110) that can receive an input power signal and can provide an output power signal. A power splitter unit (125) can receive the output power signal and can generate a plurality of split power input signals. The split power input signals can be received by a second power amplifier unit (160) that can provide a plurality of split power output signals. At least one isolator unit (175) that can couple at least part of the second power amplifier unit (160) with a power combiner unit (180). The power combiner unit (180) can receive the plurality of split power output signals from the second power amplifier unit (160) via the at least one isolator unit (175) and can combine the plurality of split power output signals.