Multi module RF / MW amplifier architecture with power combiner feedback

The digital control circuit in the RF power amplifier system automates phase and amplitude alignment of multiple transistors, addressing the inefficiencies of manual tuning in existing technologies by optimizing power combination efficiency and reducing costs.

WO2025186668A1 Publication Date: 2025-09-11SOLIDWATTS SA
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Patent Information

Application Number
PCT/IB2025/052125
Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
Priority Date
2024-03-06
Filing Date
2025-02-27
Publication Date
2025-09-11

AI Technical Summary

Technical Problem

Current solid-state RF power amplifiers require extensive manual tuning to align phases and amplitudes of multiple transistors for efficient power combination, which is costly and time-consuming due to component and production tolerances.

Method used

A digital control circuit adjusts the phase of low-power digital signals driving multiple power amplifier modules using directional couplers for feedback, optimizing power combination efficiency by minimizing signal imbalances through a galvanically decoupled link, such as optical fibers or transformers, and implementing self-testing and diagnostics.

Benefits of technology

This approach reduces the need for manual tuning, enhances efficiency, and reduces costs by automating phase and amplitude alignment, ensuring optimal power combination without significant losses.

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Abstract

A solid-state power amplifier architecture comprises a plurality of switched mode with gate driver circuit and digital input power amplifier modules, and a digital control circuit configured to drive the plurality of switched mode with digital input power amplifier modules with corresponding digital signals, whereby the digital control circuit is further configured for adjusting the phase of the digital signals relative to each other. The solid-state power amplifier architecture further comprises an RF or MW power combiner with load terminations that are equipped each with a corresponding directional coupler that is configured to sample the signal into the load terminations, and a feedback system implemented in the digital control circuit that uses the sample signals to adjust the phase of the digital signals to each other according to a method that maximises the efficiency of the power combination by minimising the signal into the load terminations by adjusting the phase of the digital signals into the power amplifier modules relative to each other.
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