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Real-Time Load Impedance Optimization for Radar Spectral Mask Compliance and Power Efficiency

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This paper presents a fast optimization algorithm for power amplifiers in radar transmitters based upon a metric designed to assess spectral mask compliance.  The search finds the load impedance maximizing the power-added efficiency (PAE) while providing compliance with the assigned spectral mask.   Measurement results illustrate consistency in the chosen optimum values of efficiency, while spectral mask requirements are consistently met at the optimum load impedances chosen by the search.  This algorithm will allow adaptive radar transmitter amplifiers to quickly adjust their load impedances to change frequency bands of operation, change spectral output properties based on nearby spectrum users, and meet dynamically varying spectral mask requirements.  

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Matthew Fellows

Field of Interest

“The field of interest shall be the organization, systems engineering, design, development, integration, and operation of complex systems for space, air, ocean, or ground environments. These systems include but are not limited to navigation, avionics, mobile electric power and electronics, radar, sonar, telemetry, military, law-enforcement, automatic test, simulators, and command and control."

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