研究目的
To design, fabricate, and measure a novel transmitting module self-monitoring protection system based on MEMS sensors and actuators for monitoring and protecting microwave amplifier circuits in communication and radar systems.
研究成果
The transmitting module self-monitoring protection system effectively isolates abnormal microwave amplifier circuits and reconfigures the module for impedance matching within 36 ms, with less than 9% error in switching power during overload states. Measured results confirm excellent microwave performance and alignment with theory, enhancing reliability in communication and radar systems.
研究不足
The system is designed for a specific frequency range (8-12 GHz) and may not be applicable to other frequencies; fabrication processes (MetalMUMPs and GaAs MMIC) could be complex and costly; response time of 36 ms might be a limitation for very high-speed applications.
1：Experimental Design and Method Selection:
The system integrates RF MEMS switches, a directional coupler, and MEMS power sensors to detect abnormal states (open, short, overload) in microwave amplifier circuits and reconfigure the module for impedance matching.
2：Sample Selection and Data Sources:
The components are fabricated using MetalMUMPs process for RF MEMS switches and GaAs monolithic microwave integrated circuit process for MEMS power sensors.
3：List of Experimental Equipment and Materials:
Agilent N5244A PNA-X vector network analyzer, Agilent E8257D PSG analog signal generator, Agilent HP83050A signal amplifier, RF MEMS switches, directional coupler, MEMS power sensors, matched resistor.
4：Experimental Procedures and Operational Workflow:
Measure S-parameters and performance of individual components and the integrated system under normal and abnormal conditions; trigger isolation and reconfiguration based on sensor outputs.
5：Data Analysis Methods:
Analyze measured S-parameters, response times, and errors using the specified equipment to validate theoretical predictions.
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